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Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Jenseits des Standard Modells  

NLE Websites -- All DOE Office Websites (Extended Search)

The Standard Model The Standard Model Unngelöste Rätsel Jenseits des Standard Modells Das Standard Modell gibt auf viele Fragen, über Struktur und Stabilität der Materie eine Antwort. Dazu braucht es nur die sechs Sorten von Quarks und Leptonen und die vier fundamentalen Kräfte. Aber das Standard Modell ist nicht vollständig; es gibt noch viele unbeantwortete Fragen. Eigentlich sollten wir aus Gründen der Symmetrie im Weltraum gleichviel Materie wie Antimaterie beobachten. Wir finden aber praktisch nur normale Materie! Warum? Woraus besteht die "Dunkle Materie", die wir nicht sehen können, die aber im Universum sichtbare Gravitationswirkungen zeigt? Warum kann das Standard Modell die Massen der Teilchen nicht vorhersagen? Sind Quarks and Leptonen wirklich fundamentae Teilchen, oder sind sie aus noch elementareren Partikeln aufgebaut?

2

Das Standard Modell  

NLE Websites -- All DOE Office Websites (Extended Search)

Model Model Was ist fundamental? Das Standard Modell Physiker haben eine Theorie - Das Standard Modell - entwickelt, welche erklärt, woraus die Welt besteht und was sie zusammenhält. Es ist eine einfache und überzeugende Theorie, welche hunderte von Teilchen und ihre gegenseitigen Wechselwirkungen erklärt. Dazu braucht sie nur wenige elementare Teilchen : 6 Quarks. 6 Leptonen. Das bekannteste Lepton ist das Elektron. Wir reden gleich von Leptonen. Kraft-Träger Teilchen, wie z.B. das Photon. Wir werden später über diese Teilchen reden. Alle bekannten materiellenTeilchen sind aus Quarks und Leptonen zusammengesetzt und sie wechselwirken untereinander durch den Austausch von Kraft-Träger Teilchen. Das Standard Modell ist eine gute Theorie. Eine grosse Zahl von Experimenten haben ihre Voraussagen mit unglaublicher Präzision bestätigt und alle Teilchen, welche die Theorie bis heute vorausgesagt hat, wurden auch gefunden. Aber die Theorie kann nicht alles erklären. Die Schwerkraft zum Beispiel ist nicht im Standard Modell eingeschlossen.

3

Quark Interactions  

NLE Websites -- All DOE Office Websites (Extended Search)

Interacciones del quark Interacciones del quark Volver Principal ESTOY PERDIDO!!! Los quarks tienen carga eléctrica, por lo que sufren interacciones electromagnéticas. Los quarks tienen carga de color, de modo que sufren las interacciones fuertes. Las interacciones fuertes causan que los quarks se combinen formando hadrones. Las interacciones fuertes residuales mantienen a los hadrones juntos, para formar núcleos. Los diferentes tipos de quark (u, d, c, ...) se denominan sabores. El sabor sólo se altera por medio de interacciones debiles cargadas. Por ejemplo: Todos los quarks del lado izquierdo también aparecen del lado derecho . Sin embargo, cuando un quark emite un bosón ( virtual) W+ o W-, debe cambiar su carga eléctrica y, por lo tanto, su sabor. El proceso débil predominante es el que involucra transiciones entre quarks de la misma

4

Wrme und Klteversorgungsanlagen  

Science Journals Connector (OSTI)

Nach den Grundlagen der Berechnung des Wrmeberganges (Heizlast und Khllast) werden Wrme- und Klteversorgungsanlagen, aufgeteilt nach Erzeugung und Verteilung, erlutert. Unterschieden wird nach Energietr...

Dirk Bohne

2014-01-01T23:59:59.000Z

5

Funny Quarks  

NLE Websites -- All DOE Office Websites (Extended Search)

graciosos quarks graciosos quarks Volver Principal ESTOY PERDIDO!!! Un poco de la historia del quark: En 1964 Murray Gell-Mann y George Zweig sugirieron que cientos de las partículas conocidas hasta el momento, podrían ser explicadas como una combinación de sólo 3 partículas fundamentales. Gell-Mann eligió el nombre caprichoso de "quarks" para estos constituyentes. Esta palabra aparece en la frase "three quarks for Muster Mark" en la novela de James Joyce, Finnegan's Wake. La parte revolucionaria de la idea era que ellos debieron asignarle a los quarks cargas eléctricas de 2/3 y -1/3 (en unidades de la carga del protón): nunca habían sido observadas cargas como esas. Primero los quarks fueron considerados como un truco matemático, pero los experimentos

6

Fehlermglichkeits- und Einflussanalyse (FMEA)  

Science Journals Connector (OSTI)

Zur Analyse von Fehlern in Konstruktion und Fertigung wird die Fehlermglichkeits- und Einflussanalyse (FMEA auch: Failure Mode and Effects Analysis...

2007-01-01T23:59:59.000Z

7

Quark Matter  

NLE Websites -- All DOE Office Websites (Extended Search)

Quark Quark Matter in Neutron Stars Prashanth Jaikumar Argonne National Laboratory, (PHY) September 7th, 2006 . - p.1/29 Outline * Neutron stars: observations by a theorist . - p.2/29 Outline * Neutron stars: observations by a theorist * Mass-Radius constraints on Equation of State (EoS) . - p.2/29 Outline * Neutron stars: observations by a theorist * Mass-Radius constraints on Equation of State (EoS) * Is quark matter inside neutron stars ruled out? . - p.2/29 Outline * Neutron stars: observations by a theorist * Mass-Radius constraints on Equation of State (EoS) * Is quark matter inside neutron stars ruled out? ------------------------ * Strange Quark stars: Features and "Findings" . - p.2/29 Outline * Neutron stars: observations by a theorist * Mass-Radius constraints on Equation of State (EoS) * Is quark matter inside neutron stars ruled out? ------------------------

8

Thermodynamik und Kinetik der Brennstoffzelle  

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Leistungsdaten und Betriebsverhalten einer Brennstoffzelle werden von der Thermodynamik und Kinetik der...

Peter Kurzweil

2013-01-01T23:59:59.000Z

9

Heizungs- und Lftungsanlagen  

Science Journals Connector (OSTI)

Aufgabe und Ziel der Heizungs- und Lftungstechnik [1, 2, 3] ist es, in Rumen aller Art, gleichgltig, ob es sich um solche fr den Aufenthalt von Menschen oder um Lagerrume und Fertigungssttten handelt, Raumk...

Chr. Keler

1961-01-01T23:59:59.000Z

10

Kupplungen und Bremsen  

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Kupplungen (Unterteilung s. [13] und VDI-Richtlinie 2240), auch Wellenschalter genannt, dienen zur bertragung von Leistungen bzw. Drehmomenten zwischen fluchtenden oder nahezu fluchtenden Wellenenden und zwis...

2008-01-01T23:59:59.000Z

11

Licht- und Beleuchtungstechnik, Elektrowrmegerte  

Science Journals Connector (OSTI)

Elektrische Lampen (Glhlampen und Gasentladungslampen) wandeln elektrische Energie in Lichtenergie um. Eine elektrische Beleuchtungseinrichtung besteht aus der Lampe als Lichtquelle und der Leuchte. Die Leuch...

Hille; Schneider; Gromann; Lensch

1991-01-01T23:59:59.000Z

12

Przisionsanalyse und Stchiometriebestimmung  

Science Journals Connector (OSTI)

Die Aufklrung von Art und Menge der in chemischen Verbindungen oder Stoffsystemen vorkommenden Elemente ist von grundlegender Bedeutung fr die Entwicklung von Naturwissenschaft und Technik. Aus den gewonnene...

Rudi Stahlberg; Peter Grndler

1991-01-01T23:59:59.000Z

13

Institut fr Werkzeugmaschinen und Fabrikbetrieb  

E-Print Network (OSTI)

Institut für Werkzeugmaschinen und Fabrikbetrieb Fachgebiet Montagetechnik und Fabrikbetrieb Univ h/Monat) Ausschreibungsnummer: MF-13-RH-01 Die Arbeiten im Fachgebiet Montagetechnik und

Berlin,Technische Universität

14

Prnatale und perinatale Infektionen  

Science Journals Connector (OSTI)

Infektionskrankheiten der Mutter in der Graviditt knnen die Frucht einbeziehen und sie direkt oder indirekt schdigen.

Professor Dr. Karl Knrr

1989-01-01T23:59:59.000Z

15

Graduiertenkolleg Experimentelle und  

E-Print Network (OSTI)

Moonshine ,,Mathieu Moonshine" bezeichnet einen kürzlich von Eguchi, Ooguri und Tachikawa ge- fundenen

16

Remarks on quark-quark and quark-antiquark potentials  

Science Journals Connector (OSTI)

The quark-quark potential in antisymmetrical color states and the quark-antiquark potential in color-singlet states are given to the fourth order in perturbative quantum chromodynamics. We have also corrected an error involving the charge conjugation of color matrices in our recent derivation of the quark-antiquark potential for arbitrary color states.

Suraj N. Gupta and Stanley F. Radford

1982-06-15T23:59:59.000Z

17

Minor Chemie und Molekulare Wissenschaften und Major Biologie und Erdwissenschaften  

E-Print Network (OSTI)

Minor Chemie und Molekulare Wissenschaften und Major Biologie und Erdwissenschaften Stundenplan 1 Chemie I Dr. M. Rech U113 5 ECTS 10.15-11.00 Allgemeine Chemie I Dr. M. Rech U113 Allgemeine Chemie I Dr. M. Rech U113 11.15-12.00 12.15-13.00 Allgemeine Chemie I Dr. M. Rech U113 13.15-14.00 14.15-15.00 15

Mühlemann, Oliver

18

Bentzung und Betrieb  

Science Journals Connector (OSTI)

Dieses Kapitel enthlt Hinweise fr den Planer und Projektentwickler, der neben der Beachtung der allgemein gltigen Richtlinien fr den Garagenbau sein Projekt bedarfsgerecht ausfhren und dem Bauherrn bei de...

Dipl.-Ing. Dr. techn Anton Pech; Ing. Gnter Warmuth

2009-01-01T23:59:59.000Z

19

Titel des Moduls: Schallmesstechnik und  

E-Print Network (OSTI)

Titel des Moduls: Schallmesstechnik und Signalverarbeitung (Measurement Technique and Signal. Fortgeschrittene" und/oder mit Modulen TA 2 und TA 6 "Noise and Vibration Control", "Advanced Noise and Vibration

Berlin,Technische Universität

20

Synthese und Eigenschaften von Kohlenstoffnitriden.  

E-Print Network (OSTI)

??In der hier vorliegenden Arbeit ber die Synthese und Eigenschaften von Kohlenstoffnitriden wird im ersten Teil ber die Synthese, die Strukturaufklrung, thermische Stabilitt und die (more)

Horvath-Bordon, Elisabeta

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Wert und Verwertung neuer Technologien  

Science Journals Connector (OSTI)

Ob die Wasserstoff- und Brennstoffzellentechnologien sich als erfolgreiche Alternative zum Verbrennungsmotor etablieren knnen, hngt nicht nur von ihrer technischen Leistungsfhigkeit und von der notwendigen ...

Dr. Weert Canzler; Dr. Lutz Marz

2011-06-01T23:59:59.000Z

22

Aktuelles aus Physik und Technik  

Science Journals Connector (OSTI)

Die Beitrge ber aktuelle Forschungsergebnisse aus Physik und Technik sollen ein qualitatives Verstndnis vermitteln und dazu anregen, sich mit diesen Themen weiter zu beschftigen. Es wurden Bereiche ausgew...

Priv. Doz. Dr. Ernst Kircher

2002-01-01T23:59:59.000Z

23

Energiespartipps und Checklisten  

Science Journals Connector (OSTI)

Sehr viele Energiespartipps sind in Broschren, bei den lokalen Energieversorgern und natrlich auch im Internet zu finden. Doch die unberschaubare Menge an Information hilft nicht immer.

Jrgen Eiselt

2012-01-01T23:59:59.000Z

24

Klima und Energie  

Science Journals Connector (OSTI)

Bei der Lsung von globalen Umweltproblemen besitzt der Klimaschutz mit seinen beiden strategischen Handlungsfeldern Erneuerbare Energien und Energie- Effizienz hchste Prioritt. Im Abschn. 4.1 werden die...

Prof. Dr. Ulrich Frstner

2012-01-01T23:59:59.000Z

25

Geschichte und Statistik  

Science Journals Connector (OSTI)

Die Nachrichten ber die Grndung der Colonie und die ersten Jahre ihres Bestehens haben nur mhsam, theils aus zuverlssigen mndlichen Ueberlieferungen, theils aus zerstreuten schriftlichen Auszeichnungen ei...

A. Wichgraf

1862-01-01T23:59:59.000Z

26

Boden- und Pflanzenkunde  

Science Journals Connector (OSTI)

Der Standort der landwirtschaftlichen Nutzpflanzen ist der gewachsene Boden. Er besteht aus festen, flssigen und gasfrmigen Teilen. Die festen Teile sind entweder mineralischer oder organischer Art (Humussto...

Dr.-Ing. Gerhard Schroeder

1937-01-01T23:59:59.000Z

27

Wrme und Wrmeeffekte  

Science Journals Connector (OSTI)

Berechnungen ber Wrmebildung und Wrmetransport gehren untrennbar zum Themenkreis der Biomechanik, obwohl der Begriff Wrme normalerweise nicht zur eigentlichen Mechanik gezhlt wird...

Werner Nachtigall

2001-01-01T23:59:59.000Z

28

Strategisches Management und Strategiegenese  

Science Journals Connector (OSTI)

Im vorhergenden Kapitel wurden die theoretischen Grundlagen von Total Quality Management erlutert und differenzierte Untersuchungen zu Umsetzungsversuchen im betrachteten Unternehmen angestellt. Ergebnis dies...

Martin Boehme

1998-01-01T23:59:59.000Z

29

Region und Geschlechterverhltnis  

Science Journals Connector (OSTI)

Die zweite Dimension der Transformation wurde in Kapitel 1.3.2 als regionaler Anforderungsdruck beschrieben. Um den Zusammenhang zwischen der Transformation als gesamtstaatlichem Proze und seinen Wechselwirku...

Ute Luise Fischer

2001-01-01T23:59:59.000Z

30

Spannungsregelung und Spannungsstabilitt  

Science Journals Connector (OSTI)

Im lokalen und regionalen Verteilnetz wird der Blindleistungsbedarf vorwiegend durch die Lasten bestimmt. Zweckmig ist dann eine Kompensation mittels Parallelkondensatoren, die je nach Bedarf stufenweise zu-...

Prof. Dr.-Ing. Valentin Crastan

2012-01-01T23:59:59.000Z

31

Verlustwinkelnormale und Verlustwinkelvariatoren  

Science Journals Connector (OSTI)

Es werden verschiedene Typen von festen, stufenweise vernderlichen und kontinuierlich vernderlichen Verlustwinkelnormalen (Kondensatoren mit zugeschaltetem Widerstand) beschrieben. Die beim Aufbau zu beachte...

Dr. Helmut Hoyer

1954-01-01T23:59:59.000Z

32

Investition und Ersatzbedarf  

Science Journals Connector (OSTI)

Verglichen mit dem privaten Verbrauch hat die private Investition zwar ein deutlich geringeres Gewicht als Komponente ... das Verbindungsglied zwischen Gternachfrage und Gterangebot: Die Investition dieser Peri...

Professor Dr. Uwe Westphal

1994-01-01T23:59:59.000Z

33

Investition und Ersatzbedarf  

Science Journals Connector (OSTI)

Verglichen mit dem privaten Verbrauch hat die private Investition zwar ein deutlich geringeres Gewicht als Komponente ... das Verbindungsglied zwischen Gternachfrage und Gterangebot: Die Investition dieser Peri...

Professor Dr. Uwe Westphal

1988-01-01T23:59:59.000Z

34

Windenergieausbau und Verwaltungsverfahren  

Science Journals Connector (OSTI)

Die auch im weltweiten Vergleich beeindruckende Windenergieentwicklung in Deutschland war nur mglich durch zielfhrende Rechtsnormensetzung, gerade auch im Bereich der Genehmigungsverfahren und der Flchenaus...

Prof. Dr. Lorenz Jarass; Prof. Dr. Gustav M. Obermair; Wilfried Voigt

2009-01-01T23:59:59.000Z

35

Montage-und Kontaktiertechnologien  

Science Journals Connector (OSTI)

Der konventionelle technologische Aufbau von elektronischen Schaltungen mit ungehusten Halbleiterchips erfolgt mit dem Die-und Drahtbonden (Chip and Wire). Die Halbleiterchips werden auf dem Substrattrger mo...

Prof. Dr. Herbert Reichl

1998-01-01T23:59:59.000Z

36

Beurteilung Investition und Wirtschaftlichkeit  

Science Journals Connector (OSTI)

Der Kapitalaufwand fr eine Investition und der zeitliche Verlauf des Kapitalrckflues bis hin zu einem angestrebten Nutzungsgewinn sind entscheidende Kriterien, die im Zusammenhang mit dem voraussichtlichen ...

Peter Konold; Herbert Reger

1997-01-01T23:59:59.000Z

37

Zwischen Skylla und Charybdis  

Science Journals Connector (OSTI)

..._ Das Thrombosemanagement im klinischen Alltag zwischen Anspruch und Wirklichkeit beleuchtete Prof. Dr. Martin Wehling, Mannheim. Er verwies dabei auf Parallelen in der griechischen Mythologie. Thrombosemanage...

Dr. Yvette Zwick

2014-03-01T23:59:59.000Z

38

Gesundheit und Gerechtigkeit  

Science Journals Connector (OSTI)

Der vorliegende Beitrag errtert Fragen der Gerechtigkeit, die sich im Zusammenhang mit Gesundheit und Krankheit ergeben. Unter Rckgriff auf die Theorie einer gerechten Gesundheitsversorgung von Norman Daniel...

Prof. Dr. med. Georg Marckmann MPH

2008-08-01T23:59:59.000Z

39

Zusammenarbeit zwischen Orthoptistin und Augenarzt und die Ausbildung in Pie- und Orthoptik  

Science Journals Connector (OSTI)

Die Untersuchung und Behandlung von Schielpatienten lag frher allein in den Hnden der Augenrzte. Spter entwickelte sich der Beruf der Orthoptistin, der Fachwissen, viel Geduld und Einfhlungsvermgen erforder...

Priv. Doz. Dr. Wolf Dieter Schfer

1976-01-01T23:59:59.000Z

40

Verbraucherverhalten angesichts baulicher und technischer Rahmenbedingungen  

Science Journals Connector (OSTI)

Der Energieverbrauch fr Raumheizung und Warmwasserbereitung privater Haushalte wird weitgehend durch gebudetechnische Merkmale und systemtechnische Kriterien bei den Heiz- und Warmwasserbereitungsanlagen bes...

Dr.-Ing. B. Geiger

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Schulbuchanalyse im Fachbereich Ernhrung und Chemie.  

E-Print Network (OSTI)

??Ziel der Arbeit ist, ausgewhlte Schulbcher zu analysieren und mittels Fragebogenerhebung festzustellen, welche Unterrichtsmaterialien und fcher-bergreifende Inhalte verwendet und welche Experimente bzw. praktische bungen in (more)

Stramayer, Daniela

2009-01-01T23:59:59.000Z

42

Unternehmenbewertung und -steuerung  

Science Journals Connector (OSTI)

Das Problem der Bewertung und Steuerung von Unternehmen kann man von einer theoretischen oder einer praktischen Ebene angehen. Von der theoretischen Seite hat man sich in den 90er-Jahren mit diesem Thema zu be...

Walter S. A. Schwaiger

2001-01-01T23:59:59.000Z

43

Handelsarten und Kursnotierung  

Science Journals Connector (OSTI)

So verschieden wie die Marktsegmente der Wertpapierbrse, sind auch die Arten, wie Kurse fr die gehandelten Wertpapiere festgestellt werden. Wir sagten schon, da sich die Brse in den Rententeil und in den A...

Rdiger Diedrigkeit

1991-01-01T23:59:59.000Z

44

Spannungsregelung und Spannungsstabilitt  

Science Journals Connector (OSTI)

Konstanz von Frequenz und Spannung sind wichtige Qualittsmerkmale des Netzes. Das Problem der Frequenzhaltung ist in Kap. 11 behandelt worden. Die Frequenz ist in einem groen Verbundnetz sehr stabil, da die ...

Dr.-Ing. Valentin Crastan

2004-01-01T23:59:59.000Z

45

Spannungsregelung und Spannungsstabilitt  

Science Journals Connector (OSTI)

Konstanz von Frequenz und Spannung sind wichtige Qualittsmerkmale des Netzes. Das Problem der Frequenzhaltung ist in Kap. 11 behandelt worden. In einem groen Verbundnetz ist die Frequenz sehr stabil, da die ...

2009-01-01T23:59:59.000Z

46

Belastung und Belastbarkeit. Verluste  

Science Journals Connector (OSTI)

Unter Belastung oder Leistung einer Maschine versteht man diejenige Leistung, die von der Maschine jeweils verlangt und geliefert wird, sie ist also nicht eine Eigenschaft der Maschine, sondern hngt von den V...

Dr.-Ing. K. Hoerner

1928-01-01T23:59:59.000Z

47

Planung und Baudurchfhrung  

Science Journals Connector (OSTI)

Die Baudurchfhrung von WV-Anlagen, von dem Entschlu zu bauen bis zur Inbetriebnahme der gebrauchsfertigen Anlage, erfordert eine Vielzahl von Arbeiten und das Einschalten einer Reihe von Spezialisten auf den...

Dipl.-Ing. Manfred Edenhofner

1999-01-01T23:59:59.000Z

48

Fehlermglichkeits- und -einflussanalyse (FMEA)  

Science Journals Connector (OSTI)

Die Fehlermglichkeits- und -einflussanalyse (engl.: Failure-Mode-and-Effects Analysis), kurz FMEA, wird im Rahmen des Qualittsmanagements zur prventiven ... 2003, S. 74). Frehr beschreibt die FMEA als eine Ma...

2006-01-01T23:59:59.000Z

49

Anwendungskonzeptionen und Einsatzbereiche  

Science Journals Connector (OSTI)

Die wichtigste Voraussetzung fr den erfolgreichen Einsatz von Windkraftanlagen sind gute Windverhltnisse. So banal diese Feststellung auch ist, so wichtig ist sie und kann deshalb nicht oft genug wiederholt ...

Dipl.-Ing. Erich Hau

1996-01-01T23:59:59.000Z

50

Gehuse- und Montagetechnik  

Science Journals Connector (OSTI)

Nach der Prozessierung der Halbleiterscheiben (vgl.Abschn.8) werden die einzelnen rechteckfrmigen Integrierten Schaltungen (Chips) getestet und anschlieend herausgesgt. Die Chips (Abb.9.1 zeigt einen Silizi...

Dr.-Ing. Ingolf Ruge; Dr.-Ing. Hermann Mader

1991-01-01T23:59:59.000Z

51

Kraftwerke, Technik und Kosten  

Science Journals Connector (OSTI)

Kraftwerke sind Anlagen zur ausschlielichen Erzeugung von elektrischer Energie. Sie werden unterschieden nach der Art des Prozesses, der Art der eingesetzten Primrenergie und der Art ihres Einsatzes im Verbu...

2009-01-01T23:59:59.000Z

52

Atrien und Vordcher  

Science Journals Connector (OSTI)

Glasdcher sind seit Mitte des 19. Jahrhunderts ein Merkmal moderner Architek tur und durch die ffnung eines Gebudes zum Himmels Ausdruck des Strebens nach Licht (Abb. 10.1). Deren Konstruktion ist jedoch mit n...

Simon Roberts; Nicol Guariento

2009-01-01T23:59:59.000Z

53

Bnderstruktur und Ladungstransport  

Science Journals Connector (OSTI)

Wir przisieren unsere Vorstellung von einem Halbleiter und leiten daraus ab, wie viele Ladungstrger in den jeweiligen Bndern fr die elektrische Leitung zur Verfgung stehen. Wir werden sehen, dass ein Halb...

2005-01-01T23:59:59.000Z

54

Bnderstruktur und Ladungstransport  

Science Journals Connector (OSTI)

Wir przisieren unsere Vorstellung von einem Halbleiter und leiten daraus ab, wie viele Ladungstrger in den jeweiligen Bndern fr die elektrische Leitung zur Verfgung stehen. Wir werden sehen, dass ein Halb...

Frank Thuselt

2011-01-01T23:59:59.000Z

55

Ausleseverfahren und Institutionen der nationalen Elitebildung und ihre internationalen Herausforderungen  

Science Journals Connector (OSTI)

In dem Beitrag wird das Thema der Elitebildung in historisch-vergleichender Perspektive und konzentriert auf drei Aspekte diskutiert: Zunchst werden 1.) die historische Genese und die unterschiedlichen Verfah...

Prof. Dr. Bernd Zymek

2014-07-01T23:59:59.000Z

56

Zwischen Skylla und Charybdis: Motive von Ma und Mitte  

Science Journals Connector (OSTI)

Das Bild der mavollen Mitte geht begrndungslogisch der Rede von den Extremen voraus. Mit Mitte wird bis heute Ebenma, Wohlgestalt und Harmonie assoziiert, und das nicht nur politisch wie im Hufe...

Tobias Prwer

2011-01-01T23:59:59.000Z

57

Quark Condensates: Flavour Dependence  

E-Print Network (OSTI)

We determine the q-bar q condensate for quark masses from zero up to that of the strange quark within a phenomenologically successful modelling of continuum QCD by solving the quark Schwinger-Dyson equation. The existence of multiple solutions to this equation is the key to an accurate and reliable extraction of this condensate using the operator product expansion. We explain why alternative definitions fail to give the physical condensate.

R. Williams; C. S. Fischer; M. R. Pennington

2007-03-23T23:59:59.000Z

58

Methoden und Begriffe im Umfeld (und deren Schnittstellen zur FMEA)  

Science Journals Connector (OSTI)

In diesem Kapitel haben Sie die Mglichkeit, etwas ber den blichen FMEA-Horizont hinauszuschauen, um Zusammenhnge und Prozessschwchen schneller...

Dipl.-Ing. Martin Werdich

2012-01-01T23:59:59.000Z

59

Methoden und Begriffe im Umfeld (und deren Schnittstellen zur FMEA)  

Science Journals Connector (OSTI)

In diesem Kapitel haben Sie die Mglichkeit, etwas ber den blichen FMEA-Horizont hinauszuschauen, um Zusammenhnge und Prozessschwchen schneller...

Martin Werdich

2011-01-01T23:59:59.000Z

60

Top Quark Mass Measurements  

Science Journals Connector (OSTI)

First observed in 1995 the top quark is one of a pair of third?generation quarks in the Standard Model of particle physics. It has charge +2/3e and a mass of 171.4 GeV about 40 times heavier than its partner the bottom quark. The CDF and D collaborations have identified several hundred events containing the decays of top?antitop pairs in the large dataset collected at the Tevatron proton?antiproton collider over the last four years. They have used these events to measure the top quarks mass to nearly 1% precision and to study other top quark properties. The mass of the top quark is a fundamental parameter of the Standard Model and knowledge of its value with small uncertainty allows us to predict properties of the as?yet?unobserved Higgs boson. This paper presents the status of the measurements of the top quark mass. It is based on a talk I gave at the Conference on the Intersections of Particle and Nuclear Physics in Puerto Rico May 2006 which also included discussion of measurements of other top quark properties.

A. P. Heinson; CDF Collaboration; D Collaboration

2006-01-01T23:59:59.000Z

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61

Top Quark Measurements  

E-Print Network (OSTI)

Ten years after its discovery at the Tevatron collider, we still know little about the top quark. Its large mass suggests it may play a key role in the mechanism of Electroweak Symmetry Breaking (EWSB), or open a window of sensitivity to new physics related to EWSB and preferentially coupled to it. To determine whether this is the case, precision measurements of top quark properties are necessary. The high statistics samples being collected by the Tevatron experiments during Run II start to incisively probe the top quark sector. This report summarizes the experimental status of the top quark, focusing in particular on the recent measurements from the Tevatron Run II.

A. Juste

2005-12-20T23:59:59.000Z

62

Aufbau und Umgestaltung einer Gemeinschaft  

Science Journals Connector (OSTI)

Die Religionen haben uns mit einem wunderbaren Mythus beschenkt. Lange bevor wir geboren werden, leben wir in einer anderen Welt, in Eden, und der weise Weltenvater, der alle geborenen und ungeborenen Wesen si...

J. L. Moreno

1996-01-01T23:59:59.000Z

63

Zahnbrche und Zahnkrfte in Asynchronmotoren  

Science Journals Connector (OSTI)

Die pulsierenden Tangential- und Radialkrfte auf die Rotorzhne werden mittels zweier verschiedener Methoden an einem 3000 kW-und einem 45 kW-Motor berechnet. Die Tangentialkraft auf den einzelnen Zahn ist be...

K. Oberretl

1997-10-01T23:59:59.000Z

64

Die FMEA und individuelles Lernen  

Science Journals Connector (OSTI)

Im zweiten Kapitel wurden die Qualittstechnik FMEA im Detail vorgestellt und die lerntheoretischen Grundlagen fr eine Integration von Lernen und FMEA gelegt. Dieses Kapitel befat sich mit der FMEA als Instrume...

Patrick Stahl

1997-01-01T23:59:59.000Z

65

> Ingenieurpromotion-Starken und Qualitatssicherung  

E-Print Network (OSTI)

Redaktion: Ralf Sonnenberg, Dr. Mandy Pastohr Layout-Konzeption: acatech Konvertierung und Satz: Fraunhofer ANSATZ DES KIT UND DER DAIMLER AG Thomas Meyer 147 159 >YOUR INNOVATION - DAS THYSSENKRUPP

Nabben, Reinhard

66

Grundlagen der MRT und MRS  

Science Journals Connector (OSTI)

In diesem Kapitel werden neben den physikalischen Grundlagen der MRT und der MRS (Kap. 2.22.4) die technischen Komponenten des Gerts (Kap. 2.5), die biologischen Wirkungen der verwendeten elektrischen und ma...

W. Semmler; G. Brix; H. Kolem; W. R. Nitz; F. Hauert

1997-01-01T23:59:59.000Z

67

Pie rcing , Schmuck und Fingerngel  

Science Journals Connector (OSTI)

Das Vermeiden von Schmuck und Piercings auf Seiten des Personals ist ein wichtiger Aspekt in der Hygiene und zur Verminderung von Verletzungsgefahren. Solche Details werden jedoch nicht in Gesetzen geregelt. G...

Dr. Markus Schimmelpfennig

2014-01-01T23:59:59.000Z

68

Institut fr Werkzeugmaschinen und Fabrikbetrieb  

E-Print Network (OSTI)

Automatisierungstechnik · Prof. Dr.-Ing. Günther Seliger Fachgebiet Montagetechnik und Fabrikbetrieb · Prof. Dr

Berlin,Technische Universität

69

Angewandte Biowissenschaften Departement Chemie und  

E-Print Network (OSTI)

Angewandte Biowissenschaften Departement Chemie und CHABD RUZICKA PREIS 2012Departement Chemie und wichtigsten Nachwuchsförderungspreise auf dem Gebiet der Chemie in der Schweiz. Leopold Ruzicka wurde am 13 in Karlsruhe Chemie und war von 1912 bis 1916 Assistent an der ETH Zürich. Anschliessend arbeitete er für die

Giger, Christine

70

Zur Anmeldung von Beitrgen und/oder zur Teilnahme an der Veranstaltung verwenden  

E-Print Network (OSTI)

-, Schiffs- und Raumfahrttechnik - Verfahrens-, Automatisierung- und Energietechnik - Wärme-, Klima- und

Rostock, Universität

71

quark-web.dvi  

NLE Websites -- All DOE Office Websites (Extended Search)

FREE FREE QUARK SEARCHES The basis for much of the theory of particle scattering and hadron spectroscopy is the construction of the hadrons from a set of fractionally charged constituents (quarks). A central but unproven hypothesis of this theory, Quantum Chromodynamics, is that quarks cannot be observed as free particles but are confined to mesons and baryons. Experiments show that it is at best difficult to "unglue" quarks. Accelerator searches at increasing energies have pro- duced no evidence for free quarks, while only a few cosmic-ray and matter searches have produced uncorroborated events. This compilation is only a guide to the literature, since the quoted experimental limits are often only indicative. Reviews can be found in Refs. 1-4. References 1. M.L. Perl, E.R. Lee, and D. Lomba, Mod. Phys. Lett. A19, 2595 (2004). 2. P.F. Smith, Ann. Rev. Nucl. and Part. Sci. 39,

72

Beeintrchtigung der Geruchs-und Farbwahrnehmung bei genetischen und nicht genetischen Parkinsonsyndromen  

E-Print Network (OSTI)

Univariate Analysen: Zweiseitige Mann-Whitney und Kruskall- Wallis Tests für kontinuierliche und Chi

Groppe, Jinghua

73

Charakterisierung von Grapefruitl und -saft durch HPLC  

Science Journals Connector (OSTI)

Es wird eine schnelle und zuverlssige HPLC-Methode zur Charakterisierung von Grapefruitl und -saft vorgestellt. Der individuelle Gehalt an Nootkaton,...1H- und13C-NMR-Spektroskopie identifiziert. Eine der ident...

Hartwig Schulz; Gerd Albroscheit

1992-09-01T23:59:59.000Z

74

quarks-web.dvi  

NLE Websites -- All DOE Office Websites (Extended Search)

and and 2013 update for the 2014 edition (URL: http://pdg.lbl.gov) December 18, 2013 12:00 - 2- the introduction of a dimensionful scale parameter µ. The mass parameters in the QCD Lagrangian Eq. (1) depend on the renor- malization scheme used to define the theory, and also on the scale parameter µ. The most commonly used renormalization scheme for QCD perturbation theory is the MS scheme. The QCD Lagrangian has a chiral symmetry in the limit that the quark masses vanish. This symmetry is spontaneously broken by dynamical chiral symmetry breaking, and explicitly broken by the quark masses. The nonperturbative scale of dynamical chiral symmetry breaking, Λ χ , is around 1 GeV [2]. It is conventional to call quarks heavy if m > Λ χ , so that explicit chiral symmetry breaking dominates (c, b, and t quarks are heavy), and light if m < Λ χ , so that spontaneous chiral symmetry breaking

75

Inkubationszeit und bertragungsparameter der Ebola-Viruskrankheit .  

E-Print Network (OSTI)

??Ziel dieser Arbeit war, epidemiologisch relevante Parameter der Ebola-Viruskrankheit mithilfe von mathematischen Modellen zu schtzen und die Schtzwerte epidemiologisch zu interpretieren und zu diskutieren. Es (more)

Seiler, Nina

2008-01-01T23:59:59.000Z

76

Die Beziehungen zwischen Polen und der Ukraine.  

E-Print Network (OSTI)

??Die Studie beschftigt sich mit den ukrainisch-polnischen Beziehungen vom Systemwechsel in Polen und der Ukraine (1989 bzw. 1991) bis zur Gegenwert (2008) und geht dabei (more)

Klymenko, Lina

2009-01-01T23:59:59.000Z

77

Sicherheitsaspekte von Wasserstoff als Energietrger und Energiespeicher  

Science Journals Connector (OSTI)

Wasserstoff ist Grundstoff der Chemietechnik und wird in der chemischen Industrie seit Jahrzehnten grotechnisch sicher beherrscht. Herstellung, Speicherung, Transport und Nutzung von Wasserstoff sind dort im ...

Manfred Fischer; Helmut Eichert

1989-01-01T23:59:59.000Z

78

Sicherheitsaspekte von Wasserstoff als Energietrger und Energiespeicher  

Science Journals Connector (OSTI)

Wasserstoff ist Grundstoff der Chemietechnik und wird in der chemischen Industrie seit Jahrzehnten grotechnisch sicher beherrscht. Herstellung, Speicherung, Transport und Nutzung von Wasserstoff sind dort im ...

Prof. Dr.-Ing. Carl-Jochen Winter; Dr.-Ing. Joachim Nitsch

1986-01-01T23:59:59.000Z

79

Gebudeleittechnik und Energiemanagement in Nichtwohnbauten  

Science Journals Connector (OSTI)

Die Gebudeleittechnik hat im Hinblick auf Energiesparmanahmen bereits einen hohen Ausnutzungsgrad erreicht. Die Arbeit an adaptiven Regelalgorithmen ist im Gange und wird bald das restliche Einsparpotential ...

M. Ellrich

1991-01-01T23:59:59.000Z

80

Ukraine und die Europische Union.  

E-Print Network (OSTI)

??Die vorliegende Arbeit setzt sich mit der Beziehungen zwischen der Ukraine und der EU aus-einander. Die zentrale Fragestellung, die in dieser Arbeit bearbeitet wurde, ist (more)

Antonishena, Tetyana

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Wasserstoff in Titan und Titanlegierungen  

Science Journals Connector (OSTI)

Wegen der sehr geringen Lslichkeit des Wasserstoffs bei Raumtemperatur als Einlagerungselement in Titan und seinen Legierungen fhren Wasserstoffgehalte zu einer Hydridausscheidung oder zumindest zu einer Ansamm...

Dr. rer. nat. Ulrich Zwicker

1974-01-01T23:59:59.000Z

82

Berechnung und Entwurf klimatechnischer Anlagen  

Science Journals Connector (OSTI)

Jede Anlage der Klimatechnik ist fr bestimmte Wrme-, Klte- und Luftleistungen auszulegen. Auch die Be- oder Entfeuchtungsleistung kann als ein Bestandteil der Anlagenleistung angesehen werden. Allerdings wi...

Dr.-Ing. Harald Loewer

1968-01-01T23:59:59.000Z

83

Gemische aus Wasserstoff und Methan  

Science Journals Connector (OSTI)

Aufgrund seiner spezifischen Vorteile ist der Verbrennungsmotor der am weitesten verbreitete Energiewandler in der automotiven Anwendung. Der Verbrennungsmotor kann unterschiedliche flssige und gasfrmige Kra...

Helmut Eichlseder; Manfred Klell

2010-01-01T23:59:59.000Z

84

Gemische aus Wasserstoff und Methan  

Science Journals Connector (OSTI)

Aufgrund seiner spezifischen Vorteile ist der Verbrennungsmotor der am weitesten verbreitete Energiewandler in der automotiven Anwendung. Der Verbrennungsmotor kann unterschiedliche flssige und gasfrmige Kra...

Univ.-Prof. Dr. Helmut Eichlseder

2012-01-01T23:59:59.000Z

85

Das deutsche Zertifizierungs- und Akkreditierungssystem  

Science Journals Connector (OSTI)

Eine Akkreditierung der Prflaboratorien und Zertifizierungsstellen ist eine wichtige vertrauensbildende Manahme. Eine Zertifizierung wird nur dann die Warenverkehrsfreiheit innerhalb des europischen Binnenm...

2007-01-01T23:59:59.000Z

86

Entwurfspotentiale und Grenzen Wirtschaftsvertrgliche Architektur  

Science Journals Connector (OSTI)

Fr die konomische Nutzung der von Architektur vereinnahmten Rume und besetzten Flchen suchen wir im Allgemeinen wirtschaftliche Bebauungsweisen. Stdte sind, im allgemeinsten Sinne des Wortes, Sttten des...

Manfred Berthold

2010-01-01T23:59:59.000Z

87

Rechnung und Messung an Windkraftmaschinen  

Science Journals Connector (OSTI)

Die Betriebsgleichungen einer im freien Strom arbeitenden Turbine werden aufgestellt und am Beispiel einer zweiflgeligen Windmhle die Leistungsberechnung fr verschiedene Betriebszustnde durchgefhrt. Die V...

Carl Tpfer

1930-10-01T23:59:59.000Z

88

Die FMEA und organisationales Lernen  

Science Journals Connector (OSTI)

Nachdem geklrt ist, wie die FMEA individuelles Lernen in Organisationen untersttzt, soll ihre...407 Cyert und March verwendeten den Begriff organizational learning als erste.408...Organisationales...

Patrick Stahl

1997-01-01T23:59:59.000Z

89

Fachschaft Chemie und Wirtschaftschemie  

E-Print Network (OSTI)

Fachschaft Chemie und Wirtschaftschemie Albert-Einstein-Allee 11 c/o AStA Uni Ulm 89081 Ulm Tel: +49 731 50-22407 Fax: +49 731 50-22403 E-Mail: fs-chemie@uni-ulm.de Universität Ulm Albert-Einstein-Allee 11 · 89081 Ulm · www.uni-ulm.de Prof.Dr. Gerhard Maas Institut für Organische Chemie I Albert

Pfeifer, Holger

90

Absolventinnen und Absolventen der Chemie, Chemie-und Bioingenieurwissenschaften und Interdisziplinren Naturwissenschaften finden ihre Ttigkeitsgebiete vor allem in den  

E-Print Network (OSTI)

Absolventinnen und Absolventen der Chemie, Chemie- und Bioingenieurwissenschaften und Studieng�nge Bachelor/Master Chemie Prof. Dr. Donald Hilvert Tel: 044 632 3176 E-mail: donald.hilvert@org.chem.ethz.ch Bachelor/Master Chemie- und Bioingenieurwissenschaften Prof. Dr. Massimo Morbidelli Tel: 044 632 3034 E

91

Fachprfungsordnung fr den Bachelor-und Masterstudiengang Chemie-und Bioingenieurwesen  

E-Print Network (OSTI)

1 Fachprüfungsordnung für den Bachelor- und Masterstudiengang Chemie- und Bioingenieurwesen der Prüfung im Bachelor- und im konsekutiven Masterstudium des Studiengangs Chemie- und Bioingenieurswesen mit Bachelorstudiengang Chemie- und Bioingenieurwesen beträgt sechs Semester. § 36 Masterstudiengang, Regelstudienzeit (1

Fiebig, Peter

92

Detecting heavy quarks  

SciTech Connect

In this exercise we examine the performance of a detector specifically configured to tag heavy quark (HQ) jets through direct observations of D-meson decays with a high resolution vertex detector. To optimize the performance of such a detector, we assume the small diamond beam crossing configuration as described in the 1978 ISABELLE proposal, giving a luminosity of 10/sup 32/ cm/sup -2/ sec/sup -1/. Because of the very large backgrounds from light quark (LQ) jets, most triggering schemes at this luminosity require high P/sub perpendicular to/ leptons and inevitably give missing neutrinos. If alternative triggering schemes could be found, then one can hope to find and calculate the mass of objects decaying to heavy quarks. A scheme using the high resolution detector will also be discussed in detail. The study was carried out with events generated by the ISAJET Monte Carlo and a computer simulation of the described detector system. (WHK)

Benenson, G.; Chau, L.L.; Ludlam, T.; Paige, F.E.; Platner, E.D.; Protopopescu, S.D.; Rehak, P.

1983-01-01T23:59:59.000Z

93

Nichtregierungsorganisationen als Player in der Nachhaltigkeitspolitik Mglichkeiten und Grenzen  

Science Journals Connector (OSTI)

Nachhaltigkeit meint, Gesellschafts- und Wirtschaftspolitik am Ziel einer globalen, bedrfhis- und verteilungsgerechten Wohlfahrtssteigerung fr heutige und zuknftige Generationen zu messen. Zudem werden Gese...

Heiko Garrelts

2008-01-01T23:59:59.000Z

94

Challenge today: Marketing- und Event-Marketing-Effizienz  

Science Journals Connector (OSTI)

Die Einbindung des Internets und das Web-Monitoring rund um eine integrierte Event-Kommunikation bedeutet Erweiterung und zugleich Vernderung innerhalb der Organisation und bei den Abl...

Jochen Thinius; Jan Untiedt

2013-01-01T23:59:59.000Z

95

Quark-gluon plasma paradox  

E-Print Network (OSTI)

Based on simple physics arguments it is shown that the concept of quark-gluon plasma, a state of matter consisting of uncorrelated quarks, antiquarks, and gluons, has a fundamental problem.

Dariusz Miskowiec

2007-07-06T23:59:59.000Z

96

Universittsmedizin Gttingen Publikationen und Hochschulschriften 2012  

E-Print Network (OSTI)

(hydrotreated vegetable oil, HVO) und Jatrophamethylester (JME) in einem Dieselnutzfahrzeug. Verh Dtsch Ges

Gollisch, Tim

97

Fr den Transport- und Logistikmarkt relevante Megatrends  

Science Journals Connector (OSTI)

In der Transport- und Logistikbranche gibt es zahlreiche Megatrends, die Einfluss auf die zuknftige Gestaltung von...

Paul Wittenbrink

2014-01-01T23:59:59.000Z

98

Verdichter und Expander fr mobile Brennstoffzellensysteme  

Science Journals Connector (OSTI)

Zur Verbesserung von Brennstoffzellensystemen mit PEM-Brennstoffzelle ist die Konzeption und Auslegung der Kathodenluftversorgung...

Dipl.-Ing. Oliver Lang

2004-07-01T23:59:59.000Z

99

KAPITEL 10 - Lungen- und Atemwegserkrankungen  

Science Journals Connector (OSTI)

Zur Orientierung Gasaustausch und Atemregulation Ziel der Atmung ist der Gasaustausch zwischen frischer Umgebungsluft und Blut. Durch eine mglichst groe und dnne Kontaktflche wird ein rascher bertritt von Sauerstoff und Kohlendioxid gewhrleistet. Die Atmung weist physiologisch eine sehr groe Regulationsbreite auf. Ihre Kontrolle unterliegt unbewussten und bewussten Funktionen. Da beim Menschen nur eine sehr eingeschrnkte Reservoirfunktion fr die Atemgase im Krper existiert, sind bewusste Ventilationspausen nur kurzzeitig mglich. Atempausen fhren zu Sauerstoffmangel und Azidose infolge von Kohlensureakkumulation. Eine vitale Gefhrdung durch Ventilationspausen ist jedoch ausgeschlossen, da zuvor ein nicht unterdrckbarer imperativer Atemantrieb auftritt. Die Ventilation kann z. B. beim Sport auf ein Vielfaches gesteigert werden oder bei Erkrankungen der Atmungsorgane so weit reduziert sein, dass bereits unter Ruhebedingungen die Aufrechterhaltung der Blutgaswerte innerhalb der physiologischen Regulationsbreite nicht mehr gewhrleistet ist (respiratorische Globalinsuffizienz, Erschpfung der Atempumpe). Strungen des Gasaustausches Der Gasaustausch kann auf folgenden 3 Funktionsebenen gestrt sein: Atempumpe (Atemmuskulatur, kncherner Thorax, obere Atemwege und Bronchialsystem) Gasaustauschstrecke zwischen Lungengefen und Alveolarraum Atemregulation als zentralnervse Komponente. Pulmonale Erkrankungen knnen eine dieser Funktionsebenen oder, als Kombination, auch 2 oder 3 Ebenen betreffen. Sie fhren in jedem Fall zu einer Limitierung der krperlichen Leistungsfhigkeit.

2009-01-01T23:59:59.000Z

100

ber Kinetik und Mechanismus der katalytischen Schnellverbrennung bei der Bestimmung von Kohlenstoff und Wasserstoff in organischen Verbindungen  

Science Journals Connector (OSTI)

Durch das systematische Studium der Kinetik und des Mechanismus der Verbrennung und Splung wurden Voraussetzungen fr die Ausarbeitung einer Schnellstmethode zur Kohlenstoff- und Wasserstoff-mikrobestimmung g...

Miroslav Ve?e?a; Dobroslav nobl; Ladislav Synek

1961-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Prfungsordnung fr die Bachelor-und Masterstudiengnge Chemie und Molecular Science der Universitt Erlangen-Nrnberg  

E-Print Network (OSTI)

Prüfungsordnung für die Bachelor- und Masterstudiengänge Chemie und Molecular Science der) Bachelorstudium Chemie.........................................................................................13 § 27 Modulprüfungen im Grundabschnitt des Bachelorstudiums Chemie ........13 § 28 Grundlagen- und

Fiebig, Peter

102

Top Quark Condensate Revisited  

Science Journals Connector (OSTI)

......hence a strong connection with the Higgs boson itself. Such a situation can be...the top quark condensate. The Higgs boson emerges as aft bound state and...at A~ 1019 GeV. (3 19) The Higgs boson was predicted as a ft bound state......

Koichi Yamawaki

1996-02-01T23:59:59.000Z

103

Probennahme und Quantifizierung von LHKW, Ethen undMethan in Grundwasser  

Science Journals Connector (OSTI)

Der Einsatz aktiver (Pumpprobennahme, Schpfprobennahme) und passiver (Diffusionsprobennahme) Probennahmetechniken zur Gehaltsbestimmung von LHKW sowie Ethen und Methan in Grundwasser wird aus ordnungsbehrdli...

Ute Dorgerloh; Hubert Theissen; Roland Becker; Dipl.-Geol. Sabine Hilbert

2010-12-01T23:59:59.000Z

104

Zndung und Verbrennung beim Einblasen von Brenngas in heie berschallstrmungen  

Science Journals Connector (OSTI)

Bei einer experimentellen Untersuchung der Vorgnge bei der Zndung und der Verbrennung von Wasserstoff und Methan, die transversal durch Dsen und durch Bohrungen...Ma=3 und statische Temperaturen von 700 K bis ...

Herbert Wilhelmi

1974-01-01T23:59:59.000Z

105

IONENAUSTAUSCHER UND IONENAUSTAUSCHVERFAHREN BEI DER ABWASSERBEHANDLUNG  

Science Journals Connector (OSTI)

KURZREFERAT Ionenaustauscher werden in der Frischwasser- und Abwasseraufbereitung vielfach und vielseitig verwendet. Die Grnde hierfr sind die besonderen chemischen Eigenschaften dieser speziellen Klasse von Kunststoffen: Reaktivitt, Kapazitt, Selektivitt. Regenerierfahigkeit. Ist das Harzgerst zudem noch makropors (Schwammstruktur), steigert sich nicht nur die mechanische Stabilitt, sondern auch die Sorptionsfhigkeit fr organische Substanzen wie Huminsuren, Farbstoffe und Tenside. Diese Eigenschaften moderner Ionenaustauscher haben elegante und praktikable Nutzungen und Anwendungen ermglicht. Diese sind durch neue Verfahrenstechniken wie der Gleichstrom- und Gegenstromregenerierung, der Kombination von Harztypen in einem oder separaten Filtern sowie dem Filterbetrieb nach dem Fest-, Schwebe- oder Continue-Bettverfahren gefrdert und gesttzt worden. Moderne Ionenaustauscher und Ionenaustauschverfahren wirken sich zunehmend in der Industrie wie auf die Umwelt gnstig aus z.B. bei der Entfernung von Cyanid, Chromat, Schwermetallen, Farbstoffen und Tensiden; bei der Rckgewinnung wertvoller Metalle sowie der Ermglichung betriebsinterner Wasser/Abwasserkreislufe.

CHR. OEHME

1974-01-01T23:59:59.000Z

106

Bestimmung der Parton-Verteilungen im Proton anhand der Neutrino- und Antineutrino-Streuung an Wasserstoff und Deuterium  

E-Print Network (OSTI)

Bestimmung der Parton-Verteilungen im Proton anhand der Neutrino- und Antineutrino-Streuung an Wasserstoff und Deuterium

Katz, U F

1992-01-01T23:59:59.000Z

107

QuarkNet  

NLE Websites -- All DOE Office Websites (Extended Search)

QuarkNet: The science connection you've been waiting for! QuarkNet: The science connection you've been waiting for! The Opportunity: "Your program rejuvenates my soul. It connects me with a cadre of intelligent and excited educators. It reinvigorates my teaching and provides me avenues to extend and enliven the projects that I can offer my students. Without the Quarknet program I am sure that I would have left teaching years ago." The Players: High school students, teachers and physicsts working together on physics research projects exploring the hidden nature of matter, energy, space and time. The Questions: What are the origins of mass? Can the basic forces of nature be unified? How did the universe begin? How will it evolve? LHC & Fermilab Links For Teachers For Students CERN Homepage ATLAS Experiment

108

Thermodynamik der Sterne und Pulsationstheorie  

Science Journals Connector (OSTI)

Die folgenden Ausfhrungen sollen die Darstellung in den Abschnitten e) bis h) des Milneschen Kapitels Thermodynamics of the Stars und in dem Kapitel Theory of Pulsating Stars desselben Verfassers mit Rcksic...

Bengt Strmgren

1936-01-01T23:59:59.000Z

109

Kapitel 4: Deutschland und Rechtsvergleich  

Science Journals Connector (OSTI)

Demgegenber stellt die fremdntzige Organspende auf Seiten des Minderjhrigen keinen Heileingriff dar. In Deutschland (8 Abs.1 Satz1 Nr.1 lit.a dTPG) und der Schweiz (Art.13 Abs.1 sTPG) werden fremdntzi...

Elisabeth Gleixner-Eberle

2014-01-01T23:59:59.000Z

110

Rechnerarchitekturen und Betriebssysteme (CS201)  

E-Print Network (OSTI)

-471-26272-2 Uebungen: Labor-Stil (Elektronikkasten, Sensor µ-Prozessoren wie "Berkeley Motes", Arduino, Lego Mindstorm Raspberry Pi ($ 35), Arduino, Projekt Microduino . . . c Christian Tschudin CS201 ­ Rechnerarchitekturen und

Vetter, Thomas

111

Erzeugung und Speicherung von Energie  

Science Journals Connector (OSTI)

Anthropogen heit so viel wie durch den Menschen verursacht, d.h. unter der anthropogenen CO2-Produktion werden die mglichen Auswirkungen durch den Menschen und seiner Ttigkeiten auf den natrlichen Treibh...

Franz Wosnitza; Hans Gerd Hilgers

2012-01-01T23:59:59.000Z

112

Holographic Accelerated Heavy Quark-Anti-Quark Pair  

E-Print Network (OSTI)

The problem of a heavy quark-anti-quark pair which have constant eternal acceleration in opposite directions in the vacuum of deconfined maximally supersymmetric Yang-Mills theory is studied both in perturbation theory and at strong coupling using AdS/CFT. Perturbation theory is summed to obtain what is conjectured to be an exact result. It is shown to agree with a particular prescription for computing the disc amplitude in the string theory dual and it yields a value $s=\\sqrt{\\lambda}$ for the entanglement entropy of the quark and anti-quark.

Veronika E. Hubeny; Gordon W. Semenoff

2014-10-05T23:59:59.000Z

113

E-Print Network 3.0 - aenderung und ergaenzung Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

und ergaenzung Page: << < 1 2 3 4 5 > >> 1 A. WORMANN. 2014 Die Neutralisations wrme starker Suren und Basen und ihre Aenderung mit Temperatur und Konzentration (Chaleur de...

114

Top quark physics at CDF  

SciTech Connect

We present the recent results of top-quark physics using up to 6 fb{sup -1} of p{bar p} collisions analyzed by the CDF collaboration. The large number of top quark events analyzed, of the order of several thousands, allows stringent checks of the standard model predictions. Also, the top quark is widely believed to be a window to new physics. We present the latest measurements of top quark intrinsic properties as well as direct searches for new physics in the top sector.

Potamianos, Karolos

2011-12-01T23:59:59.000Z

115

Top Quark Current Experimental Status  

E-Print Network (OSTI)

Ten years after its discovery at the Tevatron collider, we still know little about the top quark. Its large mass suggests it may play a key role in the mechanism of Electroweak Symmetry Breaking (EWSB), or open a window of sensitivity to new physics related to EWSB and preferentially coupled to it. To determine whether this is the case, precision measurements of top quark properties are necessary. The high statistics samples being collected by the Tevatron experiments during Run II start to incisively probe the top quark sector. This report summarizes the experimental status of the top quark, focusing in particular on the recent measurements from the Tevatron.

A. Juste

2006-03-04T23:59:59.000Z

116

Lebensrume mit Schwefelwasserstoff und Methan als Energiequellen  

Science Journals Connector (OSTI)

Frher galt, da? ausschlie?lich Sonnenenergie die Grundlage fr alles Leben auf der Erde ist. Mit der Energiequelle Sonnenlicht und mit Chlorophyll wird von den Pflanzen aus Kohlendioxid und Wasser Traubenzuck...

Prof. Dr. Sebastian A. Gerlach

1994-01-01T23:59:59.000Z

117

Zugnge und Erklrungsanstze, dargestellt an zentralen Begriffen  

Science Journals Connector (OSTI)

Seit dem Aufstieg der Rechtsauen-Parteien und der Zunahme der Gewalt von rechts ist sowohl die Nachfrage wie auch das Angebot an Deutungen und Interpretationen sprunghaft angestiegen. Politik, Medien, Gewerks...

Hans-Gerd Jaschke

2001-01-01T23:59:59.000Z

118

Zugnge und Erklrungsanstze, dargestellt an zentralen Begriffen  

Science Journals Connector (OSTI)

Seit dem Aufstieg der Rechtsauen-Parteien und der Zunahme der Gewalt von rechts ist sowohl die Nachfrage wie auch das Angebot an Deutungen und Interpretationen sprunghaft angestiegen. Politik, Medien, Gewerks...

Hans-Gerd Jaschke

1994-01-01T23:59:59.000Z

119

Cold quark matter in compact stars  

SciTech Connect

We used an equation of state for the cold quark matter to the study of properties of quark stars. We also discuss the absolute stability of quark matter and compute the mass-radius relation for self-bound stars.

Franzon, B.; Fogaca, D. A.; Navarra, F. S. [Instituto de Fisica, Universidade de Sao Paulo Rua do Matao, Travessa R, 187, 05508-090 Sao Paulo, SP (Brazil); Horvath, J. E. [Instituto de Astronomia, Geofisica e Ciencias Atmosfericas, Universidade de Sao Paulo, Rua do Matao, 1226, 05508-090, Sao Paulo, SP (Brazil)

2013-03-25T23:59:59.000Z

120

Besonderheiten der verwendeten Kleinrechner und Bedienungshinweise  

Science Journals Connector (OSTI)

Koordinaten-Transformationen lassen sich im Rechner HP-41CV mit einfachen Tastendrcken auerordentlich einfach und problemlos...

Kurt Hain; Dr. Harald Schumny

1984-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

FACHBEREICH PHYSIK UND FACHBEREICH BIOLOGIE/CHEMIE  

E-Print Network (OSTI)

FACHBEREICH PHYSIK UND FACHBEREICH BIOLOGIE/CHEMIE ORDNUNG ?BER DEN ZUGANG UND DIE ZULASSUNG F?R Ersatzvornahme des Dekanats des Fachbereichs Biologie/Chemie am22.09.2010 befürwortet in der 88. Sitzung der Erweiterungs- fach Chemie und für das Schwerpunktfach Chemie mit dem Erweiterungsfach Physik. (2) Die

Steinhoff, Heinz-Jürgen

122

Universitt Regensburg Fakultt Chemie und Pharmazie  

E-Print Network (OSTI)

Universität Regensburg Fakultät Chemie und Pharmazie http://www.chemie.uni-regensburg.de Module Chemie und Pharmazie http://www.chemie.uni-regensburg.de Module Catalogue Bachelor Chemistry 15.06.2011 1 Fakultät Chemie und Pharmazie http://www.chemie.uni-regensburg.de Module Catalogue Bachelor Chemistry 15

Schubart, Christoph

123

Hormann Energie und Umwelt | Open Energy Information  

Open Energy Info (EERE)

Hormann Energie und Umwelt Hormann Energie und Umwelt Jump to: navigation, search Name Hormann Energie und Umwelt Place Munchen, Germany Sector Geothermal energy Product Munchen-based energy and environmental technology division involved in geothermal power. References Hormann Energie und Umwelt[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Hormann Energie und Umwelt is a company located in Munchen, Germany . References ↑ "Hormann Energie und Umwelt" Retrieved from "http://en.openei.org/w/index.php?title=Hormann_Energie_und_Umwelt&oldid=346606" Categories: Clean Energy Organizations Companies Organizations Stubs What links here Related changes Special pages Printable version

124

Active QuarkNet Centers  

NLE Websites -- All DOE Office Websites (Extended Search)

Active QuarkNet Centers Active QuarkNet Centers       QuarkNet Home - Information - Calendar - Contacts - Projects - Forms: EoI - Teachers Centers on a Google Map @ the PTEC website Mentor List Sorted by: Last Name Institution Name First Year in Program Argonne National Laboratory - On sabbatical Black Hills State University Brown, Northeastern & Brandeis Universities Brookhaven National Laboratory, Columbia & Stony Brook Universities Chicago State University Colorado State University Fermilab & University of Chicago Florida Institute of Technology Florida International University Florida State University Hampton, George Mason, William & Mary Universities Idaho State University Indiana University - On sabbatical Johns Hopkins University

125

Shear Viscosity of Quark Matter  

E-Print Network (OSTI)

We consider the shear viscosity of a system of quarks and its ratio to the entropy density above the critical temperature for deconfinement. Both quantities are derived and computed for different modeling of the quark self-energy, also allowing for a temperature dependence of the effective mass and width. The behaviour of the viscosity and the entropy density is argued in terms of the strength of the coupling and of the main characteristics of the quark self-energy. A comparison with existing results is also discussed.

W. M. Alberico; S. Chiacchiera; H. Hansen; A. Molinari; M. Nardi

2007-07-30T23:59:59.000Z

126

Dissipative force on an external quark in heavy quark cloud  

E-Print Network (OSTI)

Within the finite temperature N = 4 strongly coupled super Yang- Mills, we compute the dissipative force on an external quark in the presence of evenly distributed heavy quark cloud. This is computed holographically by constructing the corresponding gravity dual. We study the behaviour of this force as a function of the cloud density. Along the way we also analyze the stability of the gravity dual for vector and tensor perturbations.

Shankhadeep Chakrabortty

2011-10-01T23:59:59.000Z

127

Heavy quarks in the jet calculus  

Science Journals Connector (OSTI)

In this paper we explore a method for treating heavy quarks such as c and b quarks within the jet calculus. These quarks are differentiated from the more common u, d, and s quarks by the requirement that the gluons never branch into heavy-quark pairs during the jet development. We compute and discuss the charmed-quark "propagators"; the x distribution of colorless clusters containing a charmed quark, a noncharmed antiquark, and gluons; and the mass distribution of the parent partons giving rise to these colorless clusters.

L. M. Jones

1983-07-01T23:59:59.000Z

128

Top quark studies at hadron colliders  

SciTech Connect

The techniques used to study top quarks at hadron colliders are presented. The analyses that discovered the top quark are described, with emphasis on the techniques used to tag b quark jets in candidate events. The most recent measurements of top quark properties by the CDF and DO Collaborations are reviewed, including the top quark cross section, mass, branching fractions, and production properties. Future top quark studies at hadron colliders are discussed, and predictions for event yields and uncertainties in the measurements of top quark properties are presented.

Sinervo, P.K. [Univ. of Toronto, Ontario (Canada)

1997-01-01T23:59:59.000Z

129

Angewandte Biowissenschaften Departement Chemie und  

E-Print Network (OSTI)

D-CHAB Angewandte Biowissenschaften Departement Chemie und CHABD Informationstage Mi 04.09.2013 Do in neurodegenerative Erkrankungen» Prof. Dr. Roland Riek (Laboratorium für Physikalische Chemie) «Chemistry and Nano-World: Beauty and Use of Nanomaterials» Prof. Dr. Maksym Kovalenko (Laboratorium für Anorganische Chemie) 11

Sandoghdar, Vahid

130

Physics of the Charm Quark  

SciTech Connect

This is a brief summary about the development of the charm quark physics in the area of experimental physics. The summary is centered in what is done by mexican physicists, particularly in the E791 and the FOCUS Experiment at FERMILAB. FOCUS (or E831) was designed to detect states of matter combining one or more charm quarks with light quarks (strange, up, down). The experiment created 10 times as many such particles as in previous experiments and investigated several topics on charm physics including high precision studies of charm semileptonic decays, studies of hadronic charm decays (branching ratios and Daltiz analyses), lifetime measurements of all charm particles, searches for mixing, CP/CPT violation, rare and forbidden decays, spectroscopy of excited charm mesons and baryons, charm production asymmetry measurements, light quark diffractive studies, QCD studies using charm pair events and searches for and upper limits on: charm pentaquarks, double charm baryons, DSJ(2632)

Carrillo Moreno, Salvador [Universidad Iberoamericana (Mexico); Vazquez Valencia, Elsa Fabiola [CINVESTAV (Mexico); Universidad Iberoamericana (Mexico)

2006-09-25T23:59:59.000Z

131

Symmetries of Quarks and Leptons  

Science Journals Connector (OSTI)

The course is divided in four Chapters corresponding to three lectures. After an introductory first chapter, the second deals with the symmetries of strong interactions from a quark point of view. We shall dis...

F. Grsey

1979-01-01T23:59:59.000Z

132

Top quark properties at ATLAS  

E-Print Network (OSTI)

The ATLAS potential for the study of the top quark properties and physics beyond the Standard Model in the top quark sector, is described. The measurements of the top quark charge, the spin and spin correlations, the Standard Model decay (t-> bW), rare top quark decays associated to flavour changing neutral currents (t-> qX with X = gluon, Z, photon) and ttbar resonances are discussed. The sensitivity of the ATLAS experiment is estimated for an expected luminosity of 1fb-1 at the LHC. The full simulation of the ATLAS detector is used. For the Standard Model measurements the expected precision is presented. For the tests of physics beyond the Standard Model, the 5 sigma discovery potential (in the presence of a signal) and the 95% Confidence Level (CL) limit (in the absence of a signal) are given.

Dilip Jana; for the ATLAS Collaboration

2008-10-20T23:59:59.000Z

133

Prfungs-und Studienordnung fr den Bachelorstudiengang Nanoscience  

E-Print Network (OSTI)

Prüfungs- und Studienordnung für den Bachelorstudiengang Nanoscience an der Universität Regensburg Nanoscience an. 2 Die vorliegende Prüfungs- und Studienordnung regelt den Erwerb von Studien- und

Schubart, Christoph

134

Konsens und Gewalt. Zur handlungstheoretischen Integration soziologischer und konomischer Modellierungen sozialer Mechanismen der Normentstehung  

Science Journals Connector (OSTI)

Dass Normen eine handlungsleitende Rolle spielen, hat die neoklassische konomie im Rahmen ihrer Produktions-, Markt- und Preistheorien lange Zeit nicht gesehen und neigte in der Folge dazu, die normativen Gru...

Michael Schmid

2004-01-01T23:59:59.000Z

135

UniReport Satzungen und Ordnungen vom 21.12.2012 1 Ordnung der Fachbereiche Medizin, Biowissenschaften, Biochemie, Chemie und  

E-Print Network (OSTI)

, Biowissenschaften, Biochemie, Chemie und Pharmazie sowie Psychologie und Sportwissenschaften der Johann Wolfgang oder den Fachbereich Bioche- mie, Chemie und Pharmazie der Goethe-Universität ausgestellt wurde auf

Mester, Rudolf

136

Exkursion zur Geschichte und Kultur Italiens am Beispiel von Rom und Venedig vom 14.-18.12.2012  

E-Print Network (OSTI)

Exkursion zur Geschichte und Kultur Italiens am Beispiel von Rom und Venedig vom 14 . AbendlichesTreffen in Rom mit Dr. Vani Ravipati (ehemalige PhDStudentin in Ulm) und ihrem Mann Mohan

Pfeifer, Holger

137

Effiziente Modellierung und Simulation von Kommunikationsnetzen in Modelica  

Science Journals Connector (OSTI)

Technische Systeme werden zunehmend mit Rechnern und Kommunikationsnetzen ausgestattet. Aus der Kopplung von informationellen und physikalischen Teilsystemen ergibt sich der hybride dynamische Charakter solche...

Liu Liu; Georg Frey

2013-01-01T23:59:59.000Z

138

Versuche ber die Strmungsvorgnge in erweiterten und verengten Kanlen  

Science Journals Connector (OSTI)

Die im Folgenden dargestellten Untersuchungen sollten zur Klrung der Strmungsvorgnge in erweiterten Kanlen beitragen, Vorgnge, wie sie bei Turbinenpumpen und Turbogeblsen in Frage kommen und fr die Tech...

Dipl.-Ing Heinrich Hochschild

1912-01-01T23:59:59.000Z

139

Nb Metallurgie und Werkstoffuntersuchungen: Im Labor werden folgende Untersuchungen durchgefhrt .  

E-Print Network (OSTI)

Temperaturen. · Wasserstoff-, Sauerstoff- und Stickstoffanalyse im hochreinen Niob (im Aufbau) Laufende und Spectroskopy Lab., Polen (Ausbacken von Nb, Diffusion von Wasserstoff in Nb; Untersuchungen mit SIMS, XPS

140

Internet und Weblogs in der Islamischen Republik Iran.  

E-Print Network (OSTI)

??Welcher Spielraum existiert in der Islamischen Republik Iran fr Meinungs- und Informationsfreiheit? Die vorliegende Arbeit untersucht den Zusammenhang zwischen der Entwicklung neuer digitaler Medien und (more)

Krenner, Melanie

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Studienplatzfinanzierung: Internationale Erfahrungen und Implikationen fr eine Einfhrung in sterreich  

Science Journals Connector (OSTI)

Steigende Studierendenzahlen, knappe ffentliche Budgets und neue Anforderungen an die universitre Ausbildung erfordern eine permanente Reflexion und gegebenenfalls entsprechende Anpassungen an Finanzierungsm...

Karl-Heinz Leitner; Claudia Steindl

2012-04-01T23:59:59.000Z

142

Impfprogramme im Spannungsfeld zwischen individueller Autonomie und allgemeinem Wohl  

Science Journals Connector (OSTI)

Impfungen sind effektive und darber hinaus auch kostengnstige Manahmen zur Infektionsbekmpfung. Ihr Potenzial zur Verringerung von Morbiditt und Mortalitt ist weder in den westlichen Industrienationen no...

Prof. Dr. med. Georg Marckmann MPH

2008-02-01T23:59:59.000Z

143

Quark condensate for various heavy flavors  

E-Print Network (OSTI)

The quark condensate is calculated within the world-line effective-action formalism, by using for the Wilson loop an ansatz provided by the stochastic vacuum model. Starting with the relation between the quark and the gluon condensates in the heavy-quark limit, we diminish the current quark mass down to the value of the inverse vacuum correlation length, finding in this way a 64%-decrease in the absolute value of the quark condensate. In particular, we find that the conventional formula for the heavy-quark condensate cannot be applied to the c-quark, and that the corrections to this formula can reach 23% even in the case of the b-quark. We also demonstrate that, for an exponential parametrization of the two-point correlation function of gluonic field strengths, the quark condensate does not depend on the non-confining non-perturbative interactions of the stochastic background Yang-Mills fields.

Dmitri Antonov; Jose Emilio F. T. Ribeiro

2012-10-04T23:59:59.000Z

144

Universitt Bern Departement fr Chemie und  

E-Print Network (OSTI)

Kontakt Universität Bern Departement für Chemie und Biochemie Freiestrasse 3, 3012 Bern 031 631 42:45 DNA Harddisk des Lebens 10:00 ­ 10:30 Berufsbild (Bio)Chemie 10:45 ­ 11:15 Eine Reise in die Welt des) 14:00 Trio Daniel Woodtli im Wandel der Zeit Grosser Hörsaal U113 und Foyer Cafeteria U1 Chemie und

Mühlemann, Oliver

145

Ein Vergleich der Sinnbegriffe aus der Perspektive der Existenzphilosophie Albert Camus und der Sicht der Logotherapie und Existenzanalyse Viktor Frankls.  

E-Print Network (OSTI)

??Angestrebt wurde ein Vergleich der Sinngebegriffe aus der Perspektive der Existenzphilosophie Albert Camus' und der Sicht der Logotherapie und Existenzanalyse Viktor Frankls. Nach einer etymologischen (more)

Bedenicec, Helena

2008-01-01T23:59:59.000Z

146

Einsatzmglichkeiten und spezifischer Energieverbrauch von Elektrostraenfahrzeugen  

Science Journals Connector (OSTI)

Das Elektrostraenfahrzeug hat heute einen Entwicklungsstand erreicht, der es fr eine Vielzahl von Anwendungen interessant macht. Dabei kann die Elektrotraktion nicht nur einen wirksamen Beitrag zur Lrm- und...

U. Wagner

1991-01-01T23:59:59.000Z

147

Primrenergieeinsatz und Emissionsvergleich von Elektrostraen-Fahrzeugen  

Science Journals Connector (OSTI)

Elektrostraenfahrzeuge fahren emissionsfrei und im Geschwindigkeitsbereich bis 50 km/h auch praktisch geruschlos. Dennoch ist mit der Nutzung von Elektrofahrzeugen in der Bundesrepublik Deutschland die Emiss...

B. Sporckmann

1991-01-01T23:59:59.000Z

148

Hacking Is Wild Pleasure Lexikalitten und Stigmatisierungen  

Science Journals Connector (OSTI)

Es scheint, als ob die Begrifflichkeit Hacking im aktuellen Diskurs immer in den Kontext...subversiv oder Subkultur ordnen sich dazu und vermischen sich zu fast mythischen Ausprgungen.

Martin Kiel

2005-01-01T23:59:59.000Z

149

Mglichkeiten einer ausreichenden und umweltvertrglichen Energienutzung  

Science Journals Connector (OSTI)

Beim Wachstum von Pflanzen, der sogenannten Photosynthese von Biomasse aus den Grundstoffen Kohlendioxid und Wasser unter Energiezufuhr durch eingestrahltes Sonnenlicht werden davon etwa 5 Prozent chemisch in ...

Prof. Dr. rer. nat. Klaus Heinloth

1996-01-01T23:59:59.000Z

150

Universittsmedizin Gttingen Publikationen und Hochschulschriften 2006  

E-Print Network (OSTI)

. DENT MATER, 22(4): 308-13. 4. Attin T, Buchalla W (2006) Die Anwendung von Licht, Wärme und Laser

Gollisch, Tim

151

Wichte (Dichte, spezifisches Gewicht), Heizwert und Wasserstoffgehalt  

Science Journals Connector (OSTI)

Nach DIN 1306 und 1305 versteht man unter mittlerer Dichte dm eines Krpers das Verhltnis seiner Masse m zu seinem Volumen V: $${{\\text{d}}_{...

Dr. Ing. Franz Spausta

1953-01-01T23:59:59.000Z

152

Elektrische und magnetische Eigenschaften metallreicher Seltenerdmetallhalogenide.  

E-Print Network (OSTI)

??Im Rahmen dieser Arbeit wurden metallreiche Seltenerdmetallhalogenide unterschiedlicher Valenzelektronenkonzentration dargestellt und ihre physikalischen Eigenschaften untersucht. Dafr wurde sowohl der Weg des Einbaus von Interstitialwasserstoffatomen in (more)

Ryazanov, Mikhail

2004-01-01T23:59:59.000Z

153

Oberflchennahe Geothermie - Nachhaltigkeit und rechtliche Situation .  

E-Print Network (OSTI)

??Durch die sprbaren negativen Folgen fossiler und atomarer Energiegewinnung, insbesondere nach dem Atomunglck von Fukushima, werden alternative Energiequellen intensiver denn je diskutiert. Forderungen nach Klimaschutz (more)

Hhnlein, Stefanie

2013-01-01T23:59:59.000Z

154

Polarisierte und gerichtete Rntgenstrahlung aus einem Kristall  

Science Journals Connector (OSTI)

... DURCH mehrere experimentelle Untersuchungen habe ich festgestellt, dass die Atome der Elemente Wasserstoff und Helium eine ausgezeichnete Achse besitzen, in Bezug auf welche die Gleichgewichtslagen ihrer Elektronen ...

J. STARK

1930-05-17T23:59:59.000Z

155

Dezentrale Energieversorgung mit Brennstoffzellen und Mikrogasturbinen  

Science Journals Connector (OSTI)

Dezentrale Energieerzeugungsanlagen wurden in den letzten Jahren deutlich weiterentwickelt. Die Tendenz in der Gebudeenergieversorgung geht zu kleinen Einheiten, die wirtschaftlich und wettbewerbsfhig zur ze...

G. Brauner O. Univ.-Prof. Dipl.-Ing. Dr.-Ing.

2003-04-01T23:59:59.000Z

156

Neue Finanzdienstleistungen an den Geld- und Kapitalmrkten  

Science Journals Connector (OSTI)

Kapitalangebot und -nachfrage im Spiegel der gesamtwirtschaftlichen Finanzierungsrechnung der Bundesbank In der Zeit von 1960 bis 1984 betrug die Ersparnis aller inlndischen Wirtschaftssektoren (laufende Ersp...

Erhard Glogowski; Manfred Mnch

1986-01-01T23:59:59.000Z

157

Realisierung und Nutzung des Reststoff-Controlling  

Science Journals Connector (OSTI)

In den vorausgegangen Kapiteln wurden Reststoffkosten, die von Reststoffen verursachten betrieblichen Kosten, als der Kostenblock definiert, die einer verbesserten Erfassung, Zuordnung und Auswertung zugefuh...

Dr. Hartmut Fischer

2001-01-01T23:59:59.000Z

158

Teilsystem Heizung und/oder lufttechnische Anlage  

Science Journals Connector (OSTI)

Wie welter oben bereits erklrt wurde, lt sich ein Heizsystem in die Bereiche Wrmeerzeugung, Wrmeverteilung und Wrmeabgabe aufgliedern. Der Energiegehalt des eingesetzten Energietrgers (Brennstoff) entsp...

Dipl.-Ing. Klaus Endrullat; Dipl.-Ing. Peter Epinatjeff

1987-01-01T23:59:59.000Z

159

Fehler und Einflsse bei der FMEA  

Science Journals Connector (OSTI)

Zur Sicherung der Produktqualitt vor dem Einsatz in der Serie wird von der Automobilindustrie die Methode der Fehlermglichkeits- und Einflussanalyse, kurz FMEA, angewandt. Hierfr haben sich zwei Industriestand...

Dr.-Ing. Ralf Fritzsche

2010-04-01T23:59:59.000Z

160

Steuerung, Regelung und Betriebsfhrung von Windkraftanlagen  

Science Journals Connector (OSTI)

Die Westernmill war die erste Windkraftanlage, die ohne menschliche Betreuung auskam. Bei ihr sind allerdings die Aufgaben von Steuerung, Regelung und Betriebsfhrung noch vllig miteinander verwoben. Zwar ste...

Prof. Dr.-Ing. Robert Gasch; Prof. Dr.-Ing. Jochen Twele

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Top quark production at ATLAS and CMS  

E-Print Network (OSTI)

A review of the main recent results on top quark production from the ATLAS and CMS experiments is presented. Results on both electroweak single top quark production and strong top pair production are presented.

Luca Lista; on behalf of the ATLAS; CMS collaborations

2014-05-20T23:59:59.000Z

162

Heavy quarks in effective field theories  

E-Print Network (OSTI)

Heavy quark physics serves as a probe to understand QCD, measure standard model parameters, and look for signs of new physics. We study several aspects of heavy quark systems in an effective field theory framework, including ...

Jain, Ambar

2009-01-01T23:59:59.000Z

163

Quarks in the looking glass | Jefferson Lab  

NLE Websites -- All DOE Office Websites (Extended Search)

Quarks in the looking glass Jefferson Lab's Experimental Hall A The electron-quark scattering experiment was carried out in Jefferson Lab's Experimental Hall A. In this view from...

164

Top Quark Production at the LHC  

E-Print Network (OSTI)

Top quark production in proton proton collisions at the Large Hadron Collider (LHC) is reviewed using data collected by the ATLAS and CMS detectors. Most recent results on searches for new physics related to top quark production mechanism are included.

Francesco Span; for the ATLAS; CMS collaborations

2011-12-16T23:59:59.000Z

165

Top quark physics at the LHC  

E-Print Network (OSTI)

The physics perspectives of the production and decay of single top quarks and top quark pairs at the CERN Large Hadron Collider (LHC) are reviewed from a phenomenological point of view.

Werner Bernreuther

2008-05-09T23:59:59.000Z

166

Reputation von Franchising-Systemen anhand von McDonald's in der Ukraine und Pakistan.  

E-Print Network (OSTI)

??Diese Diplomarbeit behandelt Franchising allgemein und geht dann auf die Situation in der Ukraine und Pakistan ein, auerdem werden die Eigenschaften und Mglichkeiten der Messbarkeit (more)

Poszvek, Edith

2012-01-01T23:59:59.000Z

167

Langzeitanalyse des Einflusses von Temperatur- und Niederschlagsnderungen auf blitzbedingte Brnde im Kernland der USA.  

E-Print Network (OSTI)

??Feuer ist ein globales Phnomen, dessen Nutzen bereits seit der Altsteinzeit bekannt ist. Es beeinflusst globale kosystemmuster und prozesse, Vegetationszusammensetzung und verteilung, den Kohlenstoffkreislauf und (more)

Homm, Jrgen

2013-01-01T23:59:59.000Z

168

QuarkNet at Work  

NLE Websites -- All DOE Office Websites (Extended Search)

QuarkNet at Work Information for Active Mentors & Teachers     QuarkNet Home - Information - Calendar - Contacts - Projects - Forms: EoI - Teachers Information Active Centers Calendar Contacts Expectations: for Teachers, for Mentors Information on Other Funding Sources Program Overview Support: for Teachers, for Centers Staff Job Description Activities Essential Practices - Teaching with Inquiry (word.doc) Classroom Activities e-Labs: CMS - Cosmic Ray Boot Camp Project Activities Databases: Data Entry (password only) 2012 Center Reporting Resources Important Findings from Previous Years Mentor Tips Associate Teacher Institute Toolkit Print Bibliography - Online Resources Imaging Detector Principles of Professionalism for Science Educators - NSTA position

169

Flavordynamics of quarks and leptons  

Science Journals Connector (OSTI)

The present theory of flavordynamics is discussed. After giving a general introduction into the field we describe the gauge theory framework and the spontaneous symmetry breaking. Several examples of spontaneously broken theories are studied. We describe the standard theory of leptons and quarks. A special emphasis is given to a discussion of the weak decays of strange and charmed particles. Furthermore the neutral current interaction is studied. We discuss the sequential flavordynamics of leptons and quarks, concentrating on the six flavor scheme, and speculations about extended schemes of flavordynamics. The report concludes with a description of weak interactions at very high energies (production and decays of W, Z or Higgs bosons etc.).

H. Fritzsch; P. Minkowski

1981-01-01T23:59:59.000Z

170

Anwendung der Computertechnik bei wrme- und feuchteschutztechnischen Berechnungen  

Science Journals Connector (OSTI)

Die Entwicklung der Computertechnik ermglicht es, wrme- und feuchteschutztechnische Berechnungen nach Kap. 4...

Dr. rer. nat. Walter F. Cammerer

1995-01-01T23:59:59.000Z

171

Messdatenerfassung und Kommunikation im MICRO GRID eines industriellen Produktionsstandortes  

E-Print Network (OSTI)

Energiespeicher und eine ,,POWER TO GAS" -Anlage kompensiert werden. Die intelligente Koordination von Erzeugungs

Paderborn, Universität

172

Fakultt fr Biologie, Chemie und Geowissenschaften Bachelorstudiengang  

E-Print Network (OSTI)

Fakultät für Biologie, Chemie und Geowissenschaften Bachelorstudiengang Chemie Modulhandbuch Geänderte Fassung vom 31.01.2008 #12;2 Inhaltsverzeichnis Seite ?bersicht Bachelor Chemie 3 Pflichtlehrveranstaltungen 1. Modul AC I (Allgemeine und Analytische Chemie) 5 2. Modul AC II (Grundlegende Anorganische

Ott, Albrecht

173

Universitt Ulm Dienstag, 28.06. und  

E-Print Network (OSTI)

.-Ing. Hannes Rose, Fraunhofer IAO, Mobility Innovation Forum 5: Services/Handel Die ersten ElektrofahrzeugeCar Hochintegrierte Antriebssysteme und innovative Batteriekonzepte ­ Prof. Dr.-Ing. Friedberg Pautzke, Hochschule-Mobilität ­ Herausforderungen einer breiten Markteinführung ­ Dr. Martin März, Fraunhofer Institut für Integrierte Systeme und

Ulm, Universität

174

Institut fr Biochemie Arbeitskreise und Forschungsschwerpunkte  

E-Print Network (OSTI)

Institut für Biochemie Arbeitskreise und Forschungsschwerpunkte Bioorganische Chemie Prof. Dr Selektion (SELEX) Bioanorganische Chemie Prof. Dr. Carola Schulzke Modell-Synthese und Chemie aktiver Thermodynamik Spektroskopie Kalorimetrie N HN OH O N N O BzO BzO BzO NHR' O Biophysikalische Chemie Prof. Dr

Greifswald, Ernst-Moritz-Arndt-Universität

175

A relativistic constituent quark model  

SciTech Connect

We investigate the predictive power of a relativistic quark model formulated on the light-front. The nucleon electromagnetic form factors, the semileptonic weak decays of the hyperons and the magnetic moments of both baryon octet and decuplet are calculated and found to be in excellent agreement with experiment.

Schlumpf, F.

1993-08-01T23:59:59.000Z

176

Observation of the Top Quark  

DOE R&D Accomplishments (OSTI)

Top quark production is observed in{bar p}p collisions at{radical}s= 1.8 TeV at the Fermilab Tevatron. The Collider Detector at Fermilab (CDF) and D{O} observe signals consistent with t{bar t} to WWb{bar b}, but inconsistent with the background prediction by 4.8{sigma} (CDF), 4.6a (D{O}). Additional evidence for the top quark Is provided by a peak in the reconstructed mass distribution. The kinematic properties of the excess events are consistent with the top quark decay. They measure the top quark mass to be 176{plus_minus}8(stat.){plus_minus}10(sys.) GeV/c{sup 2} (CDF), 199{sub -21}{sup+19}(stat.){plus_minus}22(sys.) GeV/c{sup 2} (D{O}), and the t{bar t} production cross section to be 6.8{sub -2.4}{sup+3.6}pb (CDF), 6.4{plus_minus}2.2 pb (D{O}).

Kim, S. B.

1995-08-00T23:59:59.000Z

177

Quark confinement mechanism for baryons  

E-Print Network (OSTI)

The confinement mechanism proposed earlier and then successfully applied to meson spectroscopy by the author is extended over baryons. For this aim the wave functions of baryons are built as tensorial products of those corresponding to the 2-body problem underlying the confinement mechanism of two quarks. This allows one to obtain the Hamiltonian of the quark interactions in a baryon and, accordingly, the possible energy spectrum of the latter. Also one may construct the electric and magnetic form factors of baryon in a natural way which entails the expressions for the root-mean-square radius and anomalous magnetic moment. To ullustrate the formalism in the given Chapter for the sake of simplicity only symmetrical baryons (i.e., composed from three quarks of the same flavours) $\\Delta^{++}$, $\\Delta^{-}$, $\\Omega^-$ are considered. For them the masses, the root-mean-square radii and anomalous magnetic moments are expressed in an explicit analytical form through the parameters of the confining SU(3)-gluonic field among quarks and that enables one to get a number of numerical estimates for the mentioned parameters from experimental data. We also discuss chiral limit for the baryons under consideration and estimate the purely gluonic contribution to their masses. Further the problem of masses in particle physics is shortly discussed within the framework of the given approach. Finally, a few remarks are made about the so-called Yang-Mills Millennium problem and a possible way for proving it is outlined.

Yu. P. Goncharov

2013-12-14T23:59:59.000Z

178

E-Print Network 3.0 - auf kernmaterie und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 IW4BWLMAR3- Strategie, Innovation und Datenanalyse... . . . . . . . . . . . . . . . . . . . . . . . . . . 39...

179

E-Print Network 3.0 - aufbau und simulation Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

hauptschlich bestehend aus zwei faserbasierten und temperaturstabilisierten... von Autodesk Inventor. Anschlieend mssen die Interferometer erstellt und in den Aufbau...

180

E-Print Network 3.0 - aufbau und inbetriebnahme Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

hauptschlich bestehend aus zwei faserbasierten und temperaturstabilisierten... von Autodesk Inventor. Anschlieend mssen die Interferometer erstellt und in den Aufbau...

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

E-Print Network 3.0 - aufbau und erprobung Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

hauptschlich bestehend aus zwei faserbasierten und temperaturstabilisierten... von Autodesk Inventor. Anschlieend mssen die Interferometer erstellt und in den Aufbau...

182

E-Print Network 3.0 - aetiologie therapie und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

und tiefenpsychologisch fundierte Therapie. Bd. 3: Verhaltenstherapie. Mnchen: CIP... Institut fr Psychotherapeutische Aus- und Weiterbildung (IPAW) ... Source:...

183

E-Print Network 3.0 - analyse und modellierung Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Master- und... ), Lsungsstrategie, entwickelte Algorithmen und Datenstrukturen (Innovation, Qualitt im Bezug auf ... Source: Kurtz, Stefan - Center for Bioinformatics,...

184

Industriepartner und Partnerinstitute mit denen unser Fachgebiet kooperiert Partnerinstitut bzw. Hochschule bzw. Hochschulen im  

E-Print Network (OSTI)

, Fachgebiet Montagetechnik und Fabrikbetrieb Industriepartner: BSH Bosch und Siemens Hausgeräte GmbH, Berlin

Berlin,Technische Universität

185

Probleme der Markterschliessung das Bau- und Ausbaugewerbe Zwischen Stagnation und Neuorientierung  

Science Journals Connector (OSTI)

Die Tatsache, da investive energiesparende Manahmen trotz bis 1982 real steigender Energiepreise, gemessen am tatschlich vorhandenen rentablen Einsparpotential, bisher nur in relativ bescheidenem Umfang und...

Hans E. Maier

1986-01-01T23:59:59.000Z

186

B. Neue NATO-Strategie und Reform der Bundeswehr: Entscheidungsstrukturen und -prozesse in der deutschen Konfliktbewltigung  

Science Journals Connector (OSTI)

Das Konzept des Zwei-Ebenen-Ansatzes dient dazu, Auenpolitik im Spannungsverhltnis zwischen Anforderungen der internationalen Ebene und innerstaatlichen Mglichkeiten zu verstehen. Dabei sind die Ebenen im Z...

Timm Schneberger

2014-01-01T23:59:59.000Z

187

Beweggrnde und Voraussetzungen fr die gemeinsame Austragung der Fuballeuropameisterschaft 2012 in Polen und der Ukraine.  

E-Print Network (OSTI)

??Die Fuballeuropameisterschaft der Mnner hat sich zu einem bedeutungsvollen, internationalen sportlichen Bewerb entwickelt, welcher im Zuge der Globalisierung politische, konomische und soziale Anforderungen an diverse (more)

Seebck, Dominik

2013-01-01T23:59:59.000Z

188

Die sterreichische Wasserstoff- und Brennstoffzelleninitiative im europischen und globalen technologiepolitischen Kontext  

Science Journals Connector (OSTI)

Alternative Antriebe und Treibstoffe gewinnen in der Automobilindustrie immer mehr an Bedeutung. Um die Wettbewerbsfhigkeit der sterreichischen Zulieferindustrie langfristig abzusichern, hat das Bundesminist...

A. Dorda Dr.

2005-11-01T23:59:59.000Z

189

Die Verluste durch Hysteresis, Wirbelstrme und Reibung und ihre Darstellung im Diagramm  

Science Journals Connector (OSTI)

Durch die Ummagnetisierung des Statoreisens, die mit f 1 Perioden in der Sekunde erfolgt, wird ein Verlust durch Hysteresis und Wirbelstrme verursacht. Der durch Hysteresis hervorgerufene Wattverlust...

Professor Julius Heubach

1923-01-01T23:59:59.000Z

190

Die Verluste durch Hysteresis, Wirbelstrme und Reibung und ihre Darstellung im Diagramm  

Science Journals Connector (OSTI)

Durch die Ummagnetisierung des Statoreisens, welche mit H Polwechseln per Sekunde erfolgt, wird ein Verlust durch Hysteresis und Wirbelstrme verursacht. Der durch Hysteresis hervorgerufene Wattverlust ist der...

Julius Heubach

1903-01-01T23:59:59.000Z

191

Die ewige Fahrt zwischen Skylla und Charybdis: Die ffentlichkeitsarbeit der Fraktionen zwischen parlamentarischer und medialer Funktionslogik  

Science Journals Connector (OSTI)

Bei der Vermittlung ihrer parlamentarischen Aktivitten sehen sich Abgeordnete und Fraktionen in einem spannungsreichen Verhltnis zwischen den divergierenden Funktionslogiken des parlamentarischen Entscheidungsp...

Uwe Kranenpohl

2002-01-01T23:59:59.000Z

192

Die ewige Fahrt zwischen Skylla und Charybdis: Die ffentlichkeitsarbeit der Fraktionen zwischen parlamentarischer und medialer Funktionslogik  

Science Journals Connector (OSTI)

Bei der Vermittlung ihrer parlamentarischen Aktivitten sehen sich Abgeordnete und Fraktionen in einem spannungsreichen Verhltnis zwischen den divergierenden Funktionslogiken des parlamentarischen Entscheidungsp...

Uwe Kranenpohl

2001-01-01T23:59:59.000Z

193

Das Praxisbeispiel:Positionierung und Kommunikationspraxis fr Frucht- und Gemsesfteder Saft GmbH  

Science Journals Connector (OSTI)

In diesem Kapitel lernen Sie die Vorgehensweise fr die Entwicklung einer Positionierung kennen, mit der sich ein fhrendes Unternehmen auf einem harten und turbulenten Marktsegment erfolgreich durchgesetzt ha...

2006-01-01T23:59:59.000Z

194

Lineare Algebra und analytische Geometrie I PD Dr. Jurgen Muller  

E-Print Network (OSTI)

, M, N Mengen. Man zeige: a) Es gelten (LM)N = L(M N) und M N = N M sowie M M = M und M = . b) Es gelten (LM)N = L(M N) und M N = N M sowie M M = M und M = M. c) Es gelten L(M N) = (LM)(LN) und L(M N) = (LM)(LN) sowie M (M N) = M und M (M N) = M. d) Es seien M, N = . Wann gilt M ? N = N ? M

195

Von den Simultanreaktionen und der reaktionslosen Pause  

Science Journals Connector (OSTI)

Im Anschlu an eine kritische Untersuchung vonF. Halla 2 wird gezeigt, da es in der chemischen Simultankinetik reaktionslose Pausen geben kann, was man unter solchen zu verstehen hat und wie si...

A. Skrabal

1953-01-01T23:59:59.000Z

196

Die Gasturbine fr Energieerzeugung, Industrie und Httenwesen  

Science Journals Connector (OSTI)

Seit dem Erscheinen der ersten Auflage dieses Buches hat sich die Anzahl der zur Verfgung stehenden Typen von Industriegasturbinen der verschiedenen Hersteller in der Welt gewaltig gesteigert, und es ist derz...

Dipl.-Ing. J. Kruschik

1960-01-01T23:59:59.000Z

197

Wirtschaftliche und energetische Aspekte von Langzeitspeichern  

Science Journals Connector (OSTI)

Die in den letzten Jahren gestiegene Stromproduktion aus volatilen erneuerbaren Energietrgern in Europa hat dazu gefhrt, dass, um die jhrlichen Schwankungen der Stromerzeugung vor allem aus Wind und Photovolta...

Reinhard Haas; Amela Ajanovic

2013-09-01T23:59:59.000Z

198

Mikrobiologie und kophysiologie des Methan-Kreislaufs  

Science Journals Connector (OSTI)

Methan ist ein Spurengas in der Atmosphre (1,8 ppmv), dessen Konzentration aufgrund von anthropogenen Aktivitten jhrlich mit etwa 0,51% zunimmt. Es wird zusammen mit CO2, N2O (Lachgas), O3 (Ozon) und Fluorchl...

Professor em. Dr. sc. agr. habil. Johannes C. G. Ottow

2011-01-01T23:59:59.000Z

199

Niedertemperatur-Brennstoffzellensysteme und Wasserstoffkonditionierung Forschungsschwerpunkte  

Science Journals Connector (OSTI)

Der Markteintritt von Niedertemperatur-Brennstoffzellen steht kurz bevor. Der Beitrag umfasst aktuelle Arbeiten und Ergebnisse des Labors fr Brennstoffzellensysteme (www.fuelcells.tugraz.at) am Institut fr C...

V. Hacker Univ.-Doz. Dipl.-Ing. Dr.

2005-11-01T23:59:59.000Z

200

Windenergie in Deutschland, Europa und weltweit  

Science Journals Connector (OSTI)

Die Windenergie ist in Deutschland, Europa und weltweit der erneuerbare Ener-gietrger, der die mit Abstand grte Ausbaudynamik aufweist. Die deutschen Ausbauplanungen knnen bis zum Jahr 2030 zur Installatio...

Prof. Dr. Lorenz Jarass; Prof. Dr. Gustav M. Obermair; Wilfried Voigt

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Four-quark Bound States in Chiral SU(3) Quark Model  

E-Print Network (OSTI)

The possibility of $QQ\\bar{q}\\bar{q}$ heavy-light four-quark bound states has been analyzed by means of the chiral SU(3) quark model, where $Q$ is the heavy quark ($c$ or $b$) and $q$ is the light quark ($u$, $d$ or $s$). We obtain a bound state for the $bb\\bar{n}\\bar{n}$ configuration with quantum number $J^{P}=1^{+},I=0$ and for the $cc\\bar{n}\\bar{n}$ ($J^{P}=1^{+},I=0$) configuration which is not bound but slightly above the $D^{*}D^{*}$ threshold (n is $u$ or $d$ quark). Meanwhile, we also conclude that a weakly bound state in $bb\\bar{n}\\bar{n}$ system can also be found without considering the chiral quark interactions between the two light quarks, yet its binding energy is weaker than that with the chiral quark interactions.

M. Zhang; H. X. Zhang; Z. Y. Zhang

2007-11-07T23:59:59.000Z

202

Top Quark Production at the Tevatron  

SciTech Connect

The top quark is the most recently discovered of the standard model quarks, and because of its very large mass, studies of the top quark and its interactions are important both as tests of the standard model and searches for new phenomena. In this document, recent results of analyses of top quark production, via both the electroweak and strong interactions, from the CDF and D0 experiments are presented. The results included here utilize a dataset corresponding to up to 6 fb{sup -1} of integrated luminosity, slightly more than half of the dataset recorded by each experiment before the Tevatron was shutdown in September 2011.

Mietlicki, David J.

2011-12-01T23:59:59.000Z

203

Satzung zur nderung der Prfungsordnung fr die Bachelor-und Masterstudiengnge Chemie und Molecular Science der Friedrich-Alexander-Universitt Erlangen-Nrnberg  

E-Print Network (OSTI)

Satzung zur ?nderung der Prüfungsordnung für die Bachelor- und Masterstudiengänge Chemie und- und Masterstudiengänge Chemie und Molecular Science der Universität Erlangen-Nürnberg vom 28. November Departments Chemie und Pharmazie in der Naturwissenschaftlichen Fakultät, die auf Vorschlag der Versammlung

Fiebig, Peter

204

String Junction Model, Cluster Hypothesis, Penta-Quark Baryon and Tetra-Quark Meson  

Science Journals Connector (OSTI)

......and mB 1 GeV is the ordinary light baryon mass. In this paper...non-strange quarks. Mass of such light penta-quark baryons with NJ...O(10) MeV. While mass of light tetra-quark meson with NJ...junction was first written in the Christmas greeting card of Y. Nambu around......

Masahiro Imachi; Shoichiro Otsuki; Fumihiko Toyoda

2008-10-01T23:59:59.000Z

205

Die Theorie des Sterninnern und die Entwicklung der Sterne  

Science Journals Connector (OSTI)

ber den inneren Aufbau und die Entwicklung der Sterne sowie ber die Energiequellen der Sterne haben in den Ergebnissen der exakten Naturwissenschaften Vogt (77) und Freundlich (28) berichtet. Whrend des seit d...

Bengt Strmgren

1937-01-01T23:59:59.000Z

206

Nichtmetallische Verunreinigungen (Gase, Oxyde) im flssigen und festen Aluminium  

Science Journals Connector (OSTI)

Die nichtmetallischen Verunreinigungen sind fr die Eigenschaften des Gefges von Gu- und Knetlegierungen gleichermaen wichtig. Dies gilt vor allem fr den Gehalt des Aluminiums an Wasserstoff und Oxyden. Di...

D. Altenpohl

1965-01-01T23:59:59.000Z

207

Chemie und Pharmazie Hittorfstrasse 58-62 | 48149 Mnster  

E-Print Network (OSTI)

Chemie und Pharmazie Hittorfstrasse 58-62 | 48149 Münster dekancp@uni-muenster.de AUSSCHREIBUNG STIPENDIENPROGRAMM Zum Wintersemester 2013/14 werden am Fachbereich 12, Chemie und Pharmazie, Pro

Hinrichs, Klaus

208

Die Bestimmung von Kupfer- und Nickelspuren in Gallium  

Science Journals Connector (OSTI)

Nickel- und Kupferkontaminierungen in Gallium im ppm-Bereich und darunter stren empfindlich bei der Verwendung in der Halbleiterphysik. Der Chloridkomplex des Galliums in 6-n HC1 wird von einem stark basische...

H. Titze

1977-01-01T23:59:59.000Z

209

Titel des Moduls: Softwaretechnik fr Technische Informatik und  

E-Print Network (OSTI)

. Kapsammer und W. Retschitzegger: UML@Work, Objektorientierte Modellierung mit UML2. dpunkt-Verlag, Auflage 3

Wichmann, Felix

210

Prfungs-und Studienordnung fr den Bachelorstudiengang Nanoscience  

E-Print Network (OSTI)

Prüfungs- und Studienordnung für den Bachelorstudiengang Nanoscience an der Universität Regensburg

Schubart, Christoph

211

11 Generierung von Szenariobumen und Szenarioreduktion fr stochastische  

E-Print Network (OSTI)

.B. Zuflüsse, die elektrische Last und Windenergie beschreiben. Die Funktionen ft(·, t) beschreiben

Römisch, Werner

212

Ausschreibung vom 15.02.2012 Institut fr Werkzeugmaschinen und  

E-Print Network (OSTI)

Montagetechnik und Fabrikbetrieb Univ.Prof. Dr.Ing. Günther Seliger Ansprechpartner: Dipl.Ing. (FH) Jakub

Berlin,Technische Universität

213

Experimentelle Untersuchung ber die Koeffizienten der inneren Reibung von Stickoxyd und Propan und deren Mischungen mit Wasserstoff  

Science Journals Connector (OSTI)

Es wird also die innere Reibung von Stickoxyd nachgeprft, die Messung von Propan neu ausgefhrt. Ferner wird die innere Reibung von Mischungen NO-H2 und C3H8-H2 gemessen und gezeigt, inwieweit bereinstimmung mi...

Alfons Klemenc; Walter Remi

1923-01-01T23:59:59.000Z

214

Organisation der Informatikdienstleistungen am Departement fr Chemie und Biochemie  

E-Print Network (OSTI)

Organisation der Informatikdienstleistungen am Departement für Chemie und Biochemie Version 1 Informatikdienstleistungen am Departement für Chemie und Biochemie (DCB) werden von dem Informatikverantwortlichen (IVA) und-Administrator: Personalsekretariat DCB · Poolraum (Drucker) Fachverein · Homepage Departement Sekretariat BioChemie · IT

Mühlemann, Oliver

215

CP violation in top-quark physics  

E-Print Network (OSTI)

In this talk I review how to search for CP violation in top-quark pair production and decay using T-odd correlations. I discuss two examples which illustrate many of the relevant features: CP violation in a heavy neutral Higgs boson; and CP violating anomalous top-quark couplings. I present some numerical results for the LHC and some for the Tevatron.

German Valencia

2010-07-27T23:59:59.000Z

216

Review of Top Quark Physics Results  

SciTech Connect

As the heaviest known fundamental particle, the top quark has taken a central role in the study of fundamental interactions. Production of top quarks in pairs provides an important probe of strong interactions. The top quark mass is a key fundamental parameter which places a valuable constraint on the Higgs boson mass and electroweak symmetry breaking. Observations of the relative rates and kinematics of top quark final states constrain potential new physics. In many cases, the tests available with study of the top quark are both critical and unique. Large increases in data samples from the Fermilab Tevatron have been coupled with major improvements in experimental techniques to produce many new precision measurements of the top quark. The first direct evidence for electroweak production of top quarks has been obtained, with a resulting direct determination of V{sub tb}. Several of the properties of the top quark have been measured. Progress has also been made in obtaining improved limits on potential anomalous production and decay mechanisms. This review presents an overview of recent theoretical and experimental developments in this field. We also provide a brief discussion of the implications for further efforts.

Kehoe, R.; Narain, M.; Kumar, A.; ,

2007-12-01T23:59:59.000Z

217

Heavy Quark Production in ep Collisions  

E-Print Network (OSTI)

Heavy Quark Production in ep Collisions o Introduction o Charm Production o Beauty Production o in ep collisions 23 February 2007 2/17 Heavy Flavor Production Boson-Gluon Fusion, dominant process Hard of the proton: #12;G. Leibenguth, Heavy Quarks Production in ep collisions 23 February 2007 3/17 HERA, Electron

218

Recent advances in heavy quark theory  

SciTech Connect

Some recent developments in heavy quark theory are reviewed. Particular emphasis is given to inclusive weak decays of hadrons containing a b quark. The isospin violating hadronic decay D{sub s}* {yields} D{sub s}{sup pi}{sup 0} is also discussed.

Wise, M. [California Institute of Technology, Pasadena, CA (United States)

1997-01-01T23:59:59.000Z

219

Friction Coefficient for Quarks in Supergravity Duals  

E-Print Network (OSTI)

We study quarks moving in strongly-coupled plasmas that have supergravity duals. We compute the friction coefficient of strings dual to such quarks for general static supergravity backgrounds near the horizon. Our results also show that a previous conjecture on the bound has to be modified and higher friction coefficients can be achieved.

E. Antonyan

2006-11-22T23:59:59.000Z

220

Heavy quark thermodynamics in full QCD  

E-Print Network (OSTI)

We analyze the large-distance behaviour of static quark-anti-quark pair correlations in QCD. The singlet free energy is calculated and the entropy contribution to it is identified allowing us to calculate the excess internal energy. The free energy has a sharp drop in the critical region, leading to sharp peaks in both excess entropy and internal energy.

Konstantin Petrov; RBC-Bielefeld Collaboration

2007-01-22T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

The Top Quark, QCD, And New Physics.  

DOE R&D Accomplishments (OSTI)

The role of the top quark in completing the Standard Model quark sector is reviewed, along with a discussion of production, decay, and theoretical restrictions on the top quark properties. Particular attention is paid to the top quark as a laboratory for perturbative QCD. As examples of the relevance of QCD corrections in the top quark sector, the calculation of e{sup+}e{sup -}+ t{bar t} at next-to-leading-order QCD using the phase space slicing algorithm and the implications of a precision measurement of the top quark mass are discussed in detail. The associated production of a t{bar t} pair and a Higgs boson in either e{sup+}e{sup -} or hadronic collisions is presented at next-to-leading-order QCD and its importance for a measurement of the top quark Yulrawa coupling emphasized. Implications of the heavy top quark mass for model builders are briefly examined, with the minimal supersymmetric Standard Model and topcolor discussed as specific examples.

Dawson, S.

2002-06-00T23:59:59.000Z

222

Top quark physics expectations at the LHC  

E-Print Network (OSTI)

The top quark will be produced copiously at the LHC. This will make both detailed physics studies and the use of top quark decays for detector calibration possible. This talk reviews plans and prospects for top physics activities in the ATLAS and CMS experiments.

Andrei Gaponenko; for the ATLAS Collaboration; for the CMS Collaboration

2008-10-22T23:59:59.000Z

223

Excited quark production at the CERN LHC  

Science Journals Connector (OSTI)

We study the production of excited quarks q? of spin-1/2 predicted by composite models. Production rates, signatures, and backgrounds are discussed for the CERN LHC. We estimate the discovery mass reach for the excited quarks decaying to jet+photon.

O. ak?r and R. Mehdiyev

1999-06-22T23:59:59.000Z

224

UniReport Satzungen und Ordnungen vom 18.04.2013 1 Ordnung des Fachbereichs Biochemie, Chemie und Pharmazie fr den Master-  

E-Print Network (OSTI)

UniReport Satzungen und Ordnungen vom 18.04.2013 1 Ordnung des Fachbereichs Biochemie, Chemie und § 1 Geltungsbereich (1) Diese vom Fachbereich Biochemie, Chemie und Pharmazie am 26

Mester, Rudolf

225

UniReport Satzungen und Ordnungen vom 25.09.2012 1 Ordnung des Fachbereichs Biochemie, Chemie und Pharmazie der Johann  

E-Print Network (OSTI)

UniReport Satzungen und Ordnungen vom 25.09.2012 1 Ordnung des Fachbereichs Biochemie, Chemie und) Die vom Fachbereich Biochemie, Chemie und Pharmazie am 12.03.2012 aufgrund des § 44 Abs.1 i.V. mit

Mester, Rudolf

226

Das Ising-Modell und Monte-Carlo-Simulation Das Ising-Modell und Monte-Carlo-Simulation  

E-Print Network (OSTI)

Das Ising-Modell und Monte-Carlo-Simulation Das Ising-Modell und Monte-Carlo-Simulation Aljoscha Rheinwalt 14. Januar 2009 Betreuender Professor: Prof. M. M¨uller-Preu?ker #12;Das Ising-Modell und Monte-Carlo-Simulation Gliederung Gliederung Ising-Modell Definition Anwendungen Numerische Analyse Statistische Beschreibung Monte

227

Production and decay of heavy top quarks  

SciTech Connect

Experimental evidence indicates that the top quark exists and has a mass between 50 and 200 GeV/c{sup 2}. The decays of a top quark with a mass in this range are studied with emphasis placed on the mass region near the threshold for production of real W bosons. Topics discussed are: (1) possible enhancement of strange quark production when M{sub W} + m{sub s} < m{sub t} < M{sub W} + m{sub b}; (2) exclusive decays of T mesons to B and B{asterisk} mesons using the non-relativistic quark model; (3) polarization of intermediate W's in top quark decay as a source of information on the top quark mass. The production of heavy top quarks in an e{sup +}e{sup {minus}} collider with a center-of-mass energy of 2 TeV is studied. The effective-boson approximation for photons, Z{sup 0}'s and W's is reviewed and an analogous approximation for interfaces between photons and Z{sup 0}'s is developed. The cross sections for top quark pair production from photon-photon, photon-Z{sup 0}, Z{sup 0}Z{sup 0}, and W{sup +}W{sup {minus}} fusion are calculated using the effective-boson approximation. Production of top quarks along with anti-bottom quarks via {gamma}W{sup +} and Z{sup 0}W{sup +} fusion is studied. An exact calculation of {gamma}e{sup +} {yields} {bar {nu}}t{bar b} is made and compared with the effective-W approximation. 31 refs., 46 figs.

Kauffman, R.P.

1989-08-01T23:59:59.000Z

228

The Particle Adventure | What holds it together? | Quark confinement  

NLE Websites -- All DOE Office Websites (Extended Search)

Quark confinement Quark confinement Quark confinement Color-charged particles cannot be found individually. For this reason, the color-charged quarks are confined in groups (hadrons) with other quarks. These composites are color neutral. The development of the Standard Model's theory of the strong interactions reflected evidence that quarks combine only into baryons (three quark objects), and mesons (quark-antiquark objects), but not, for example, four-quark objects. Now we understand that only baryons (three different colors) and mesons (color and anticolor) are color-neutral. Particles such as ud or uddd that cannot be combined into color-neutral states are never observed. Color-Force Field The quarks in a given hadron madly exchange gluons. For this reason, physicists talk about the color-force field which consists of the gluons holding the bunch of quarks together.

229

The Particle Adventure | What holds it together? | Quarks emit gluons  

NLE Websites -- All DOE Office Websites (Extended Search)

holds it together? > Quarks emit gluons holds it together? > Quarks emit gluons Quarks emit gluons Color charge is always conserved. When a quark emits or absorbs a gluon, that quark's color must change in order to conserve color charge. For example, suppose a red quark changes into a blue quark and emits a red/antiblue gluon (the image below illustrates antiblue as yellow). The net color is still red. This is because - after the emission of the gluon - the blue color of the quark cancels with the antiblue color of the gluon. The remaining color then is the red color of the gluon. Quarks emit and absorb gluons very frequently within a hadron, so there is no way to observe the color of an individual quark. Within a hadron, though, the color of the two quarks exchanging a gluon will change in a way that keeps the bound system in a color-neutral state.

230

ber einfache, allgemein anwendbare Mikromethoden zur Bestimmung von Kohlenstoff-Wasserstoff, Stickstoff und Sauerstoff und eine hierzu entwickelte, automatisch gesteuerte Verbrennungsapparatur  

Science Journals Connector (OSTI)

Einfache, universell anwendbare Mikromethoden zur Bestimmung von Kohlenstoff-Wasserstoff, Stickstoff und Sauerstoff werden beschrieben, die zur Analyse aller organischen und vieler metallorganischer Verbindung...

Irene Monar

1965-01-01T23:59:59.000Z

231

HUNTING THE QUARK GLUON PLASMA.  

SciTech Connect

The U.S. Department of Energy's Relativistic Heavy Ion Collider (RHIC) construction project was completed at BNL in 1999, with the first data-taking runs in the summer of 2000. Since then the early measurements at RHIC have yielded a wealth of data, from four independent detectors, each with its international collaboration of scientists: BRAHMS, PHENIX, PHOBOS, and STAR [1]. For the first time, collisions of heavy nuclei have been carried out at colliding-beam energies that have previously been accessible only for high-energy physics experiments with collisions of ''elementary'' particles such as protons and electrons. It is at these high energies that the predictions of quantum chromodynamics (QCD), the fundamental theory that describes the role of quarks and gluons in nuclear matter, come into play, and new phenomena are sought that may illuminate our view of the basic structure of matter on the sub-atomic scale, with important implications for the origins of matter on the cosmic scale. The RHIC experiments have recorded data from collisions of gold nuclei at the highest energies ever achieved in man-made particle accelerators. These collisions, of which hundreds of millions have now been examined, result in final states of unprecedented complexity, with thousands of produced particles radiating from the nuclear collision. All four of the RHIC experiments have moved quickly to analyze these data, and have begun to understand the phenomena that unfold from the moment of collision as these particles are produced. In order to provide benchmarks of simpler interactions against which to compare the gold-gold collisions, the experiments have gathered comparable samples of data from collisions of a very light nucleus (deuterium) with gold nuclei, as well as proton-proton collisions, all with identical beam energies and experimental apparatus. The early measurements have revealed compelling evidence for the existence of a new form of nuclear matter at extremely high density and temperature--a medium in which the predictions of QCD can be tested, and new phenomena explored, under conditions where the relevant degrees of freedom, over nuclear volumes, are expected to be those of quarks and gluons, rather than of hadrons. This is the realm of the quark gluon plasma, the predicted state of matter whose existence and properties are now being explored by the RHIC experiments.

LUDLAM, T.; ARONSON, S.

2005-04-11T23:59:59.000Z

232

Active QuarkNet Centers  

NLE Websites -- All DOE Office Websites (Extended Search)

first active year) first active year)       QuarkNet Home - Information - Calendar - Contacts - Projects - Forms: EoI - Teachers Institution Contact e-mail Year Brown, Northeastern & Brandeis Universities Richard Dower - rick.dower@roxburylatin.org 1999 Fermilab & University of Chicago Chris Stoughton - stoughto@fnal.gov 1999 Florida State University Horst Wahl - wahl@hep.fsu.edu 1999 Indiana University Rick Van Kooten - rickv@paoli.physics.indiana.edu 1999 University of California - Santa Cruz Steve Ritz - ritz@scipp.ucsc.edu 1999 University of Notre Dame Dan Karmgard - Karmgard.1@nd.edu 1999 University of Oklahoma Michael Strauss - strauss@mail.nhn.ou.edu 1999 University of Rochester Kevin McFarland - ksmcf@pas.rochester.edu 1999

233

Heavy quark physics from SLD  

SciTech Connect

This report covers preliminary measurements from SLD on heavy quark production at the Z{sup 0}, using 150,000 hadronic Z{sup 0} decays accumulated during the 1993-1995 runs. A measurement of R{sub b} with a lifetime double tag is presented. The high electron beam polarization of the SLC is employed in the direct measurement of the parity-violating parameters A{sub b} and A{sub c} by use of the left-right forward-backward asymmetry. The lifetimes of B{sup +} and B{sup 0} mesons have been measured by two analyses. The first identifies semileptonic decays of B mesons with high (p,p{sub t}) leptons; the second analysis isolates a sample of B meson decays with a two-dimensional impact parameter tag and reconstructs the decay length and charge using a topological vertex reconstruction method.

Messner, R. [Stanford Univ., CA (United States)

1997-01-01T23:59:59.000Z

234

BETRIEBLICHE SCHADSCHPFUNG UND KOLOGISCHE NACHHALTIGKEIT BETRIEBSWIRTSCHAFTLICHE ANALYSE UND INTERDISZIPLINRE PERSPEKTIVEN ZUR EINORDNUNG DES UMWELTKOSTENMANAGEMENTS  

Science Journals Connector (OSTI)

Es ist nach wie vor umstritten, ob und inwieweit Erkenntnisfortschritte in der Betriebswirtschaftslehre durch das Aufgreifen der kologischen Thematik erzielbar sind. Damit stellt sich die Frage, ob oder inwie...

Heinz Karl Prammer

2009-01-01T23:59:59.000Z

235

Thrombozytenfunktion und Thrombozyten-assoziierte Immunglobuline bei Patienten mit systemischem Lupus erythematodes und chronischer Polyarthritis  

Science Journals Connector (OSTI)

The investigation of in vitro platelet functions from patients with SLE and rheumatoid arthritis (RA) revealed a distinctly reduced aggregation mass after both collagen und ADP induction. The platelet serotoni...

A. Horn; H. J. Avenarius; H. Deicher

236

Five-quark components in baryons  

E-Print Network (OSTI)

Evidence has been accumulating for the existence of significant intrinsic non-perturbative five-quark components in various baryons. The inclusion of the five-quark components gives a natural explanation of the excess of $\\bar d$ over $\\bar u$, significant quark orbital angular momentum in the proton, the problematic mass and decay pattern of the lowest $1/2^-$ baryon nonet, etc.. A breathing mode of $qqq\\leftrightarrow qqqq\\bar q$ is suggested for the lowest $1/2^-$ baryon octet. Evidence of a predicted member of the new scheme, $\\Sigma^*(1/2^-)$ around 1380 MeV, is introduced.

B. S. Zou

2010-01-07T23:59:59.000Z

237

Heavy quark diffusion from the lattice  

SciTech Connect

We study the diffusion of heavy quarks in the quark gluon plasma using the Langevin equations of motion and estimate the contribution of the transport peak to the Euclidean current-current correlator. We show that the Euclidean correlator is remarkably insensitive to the heavy quark diffusion coefficient and give a physical interpretation of this result using the free streaming Boltzmann equation. However if the diffusion coefficient is smaller than {approx}1/({pi}T), as favored by RHIC phenomenology, the transport contribution should be visible in the Euclidean correlator. We outline a procedure to isolate this contribution.

Petreczky, Peter; Teaney, Derek [Nuclear Theory Group, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States); Department of Physics and Astronomy, SUNY at Stony Brook, Stony Brook, New York 11764 (United States)

2006-01-01T23:59:59.000Z

238

Fractional electric charge and quark confinement  

E-Print Network (OSTI)

Owing to their fractional electric charges, quarks are blind to transformations that combine a color center phase with an appropriate electromagnetic one. Such transformations are part of a global $Z_6$-like center symmetry of the Standard Model that is lost when quantum chromodynamics (QCD) is treated as an isolated theory. This symmetry and the corresponding topological defects may be relevant to non-perturbative phenomena such as quark confinement, much like center symmetry and ordinary center vortices are in pure SU($N$) gauge theories. Here we report on our investigations of an analogous symmetry in a 2-color model with dynamical Wilson quarks carrying half-integer electric charge.

Sam R. Edwards; Andr Sternbeck; Lorenz von Smekal

2012-02-07T23:59:59.000Z

239

Zur Zweck(in)adquanz einer Implementierung der Passivierungs- und Bewertungsnormen von ungewissen Verbindlichkeiten gem den IAS und US-GAAP in deutsches Handels- und Steuerbilanzrecht  

Science Journals Connector (OSTI)

Das deutsche Bilanzrecht gehorcht unstreitig dem obersten Leitprinzip des Glubigerbzw. (Fremd-)Kapitalgeberschutzes;1027 das deutsche Rechnungslegungssystem ist unter dieser Primrzielsetzung gewachsen und gerei...

Marc Pisoke

2004-01-01T23:59:59.000Z

240

Bullses Pemphigoidantigen (BPA) und ?6/?4-Integrin als Marker fr frhe und spte Tumorprogession im In-vivo-Invasionsmodell und in HNO-Tumoren  

Science Journals Connector (OSTI)

Damit Tumorzellen invasiv werden bzw. metastasieren knnen, mssen am Interface zwischen Epithel bzw. Tumorinsel und umgebendem Bindegewebe Vernderungen in der Expression bestimmter Strukturproteine erfolgen. In...

C. Herold-Mende; P. Tomakidi; A. I. Born; H. Discher; F. X. Bosch

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Heavy quark production from jet conversions in a quark-gluon plasma  

SciTech Connect

Recently, it has been demonstrated that the chemical composition of jets in heavy ion collisions is significantly altered compared to the jets in the vacuum. This signal can be used to probe the medium formed in nuclear collisions. In this study we investigate the possibility that fast light quarks and gluons can convert to heavy quarks when passing through a quark-gluon plasma. We study the rate of light to heavy jet conversions in a consistent Fokker-Planck framework and investigate their impact on the production of high-p{sub T} charm and bottom quarks at the Relativistic Heavy Ion Collider and the Large Hadron Collider.

Liu, W. [Cyclotron Institute and Physics Department, Texas A and M University, College Station, Texas 77843-3366 (United States); Fries, R. J. [Cyclotron Institute and Physics Department, Texas A and M University, College Station, Texas 77843-3366 (United States); RIKEN/BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973 (United States)

2008-09-15T23:59:59.000Z

242

Press Pass - Press Release - Single top quark  

NLE Websites -- All DOE Office Websites (Extended Search)

9-04 9-04 March 9, 2009 For immediate release Media Contacts: Judy Jackson, Fermilab, +1-630-840-3351, jjackson@fnal.gov Kurt Riesselmann, Fermilab, +1-630-840-3351, kurtr@fnal.gov Graphics and photos are available at: http://www.fnal.gov/pub/presspass/images/Single-Top-Quark-2009.html Fermilab collider experiments discover rare single top quark Batavia, Ill.-Scientists of the CDF and DZero collaborations at the Department of Energy's Fermi National Accelerator Laboratory have observed particle collisions that produce single top quarks. The discovery of the single top confirms important parameters of particle physics, including the total number of quarks, and has significance for the ongoing search for the Higgs particle at Fermilab's Tevatron, currently the world's most powerful operating particle accelerator.

243

Accelerator probes for new stable quarks  

E-Print Network (OSTI)

The nonbaryonic dark matter of the Universe can consist of new stable double charged particles $O^{--}$, bound with primordial helium in heavy neutral O-helium (OHe)"atoms" by ordinary Coulomb interaction. O-helium dark atoms can play the role of specific nuclear interacting dark matter and provide solution for the puzzles of dark matter searches. The successful development of composite dark matter scenarios appeals to experimental search for the charged constituents of dark atoms. If $O^{--}$ is a "heavy quark cluster" $\\bar U \\bar U \\bar U$, its production at accelerators is virtually impossible and the strategy of heavy quark search is reduced to search for heavy stable hadrons, containing only single heavy quark (or antiquark). Estimates of production cross section of such particles at LHC are presented and the experimental signatures for new stable quarks are outlined.

Konstantin M. Belostky; Maxim Yu. Khlopov; Konstantin I. Shibaev

2011-11-15T23:59:59.000Z

244

Color screening in cold quark matter  

E-Print Network (OSTI)

We compute color screening at finite quark chemical potentials cold quark matter at the one-loop level, comparing the normal, BCS paired U(1)_em, or Higgs, and a singlet phase with color-singlet condensate near the Fermi surface. The latter phase is computed in the example of two-color QCD with a color singlet diquark condensate. In contrast to the normal and Higgs phases, neither electric nor magnetic screening masses appear in the singlet phase. The absence of a magnetic mass, within a perturbative framework, is a consequence of proper treatment of gauge invariance. While at large momenta the gluon self-energies approach those in the normal phase, the medium contributions to the infrared region below a scale of the mass gap are substantially suppressed. Infrared gluons at low quark density in the singlet phase appear protected from medium effects, unless the quark-gluon vertices are significantly enhanced in the infrared.

Kojo, Toru

2014-01-01T23:59:59.000Z

245

Theory of top quark production and decay  

SciTech Connect

Direct and indirect information on the top quark mass and its decay modes is reviewed. The theory of top production in hadron- and electron-positron-colliders is presented.

Kuehn, J.H. [Universitaet Karlsruhe (Germany)

1997-01-01T23:59:59.000Z

246

Modellierung und Simulation der Direktverdampfung in Absorberrohren  

E-Print Network (OSTI)

Modelling and simulation of direct steam generation in the absorber tubes of solar thermal power plants vonModellierung und Simulation der Direktverdampfung in Absorberrohren solarthermischer Kraftwerke Verwendung des WENO Schemas. Zur Simulation wird die numerische L¨osung in einer Software unter C++ umgesetzt

Ábrahám, Erika

247

ARBEITSGRUPPEN DEPARTEMENT FR CHEMIE UND BIOCHEMIE  

E-Print Network (OSTI)

ARBEITSGRUPPEN DEPARTEMENT F?R CHEMIE UND BIOCHEMIE O r d n e r 1 PROF. U. BAUMANN 1. Zheng L.-X. Liu, C. Tanner, A. Neels, S. Dolder, S. Leutwyler, P. Renaud, P. Bigler and S. Decurtins Angew. Chemie Entrances of Zeolite L Crystals Angew. Chemie Int. Ed., 43, 6738 - 6742 (2004). 21. A. Currao, R. R. Vanga

Mühlemann, Oliver

248

UNIVERSITT ULM "Organische, Metallorganische und Makromolekulare Chemie "  

E-Print Network (OSTI)

UNIVERSIT?T ULM Kolloquium "Organische, Metallorganische und Makromolekulare Chemie " Seminarraum Chemie III Thema: "Kurzvortrag Diplomarbeit" 03. Dezember 2010 Prof. Dr. Iris M. Oppel RWTH Aachen, Institut für Anorganische Chemie Thema: "Nano-Puzzle, molekulare Bausteine in der supramolekularen

Pfeifer, Holger

249

zukunft forschung 020950 CHEMIE UND BIOLOGIE  

E-Print Network (OSTI)

zukunft forschung 020950 ZWISCHEN CHEMIE UND BIOLOGIE Als erfolgreiche Nachwuchswissenschaftlerin in Gro?britannien. Dem Leiter ihrer neuen Forschungsgruppe wurde in diesem Jahr der Chemie-Nobelpreis zuerkannt. B auf die bioor- ganische Chemie spezialisiert hatte. In der Gruppe um den RNA-Spezialisten Ronald

Breu, Ruth

250

Evidence for production of single top quarks  

Science Journals Connector (OSTI)

We present first evidence for the production of single top quarks in the D0 detector at the Fermilab Tevatron pp collider. The standard model predicts that the electroweak interaction can produce a top quark together with an antibottom quark or light quark, without the antiparticle top-quark partner that is always produced from strong-coupling processes. Top quarks were first observed in pair production in 1995, and since then, single top-quark production has been searched for in ever larger data sets. In this analysis, we select events from a 0.9??fb-1 data set that have an electron or muon and missing transverse energy from the decay of a W boson from the top-quark decay, and two, three, or four jets, with one or two of the jets identified as originating from a b hadron decay. The selected events are mostly backgrounds such as W+jets and tt events, which we separate from the expected signals using three multivariate analysis techniques: boosted decision trees, Bayesian neural networks, and matrix-element calculations. A binned likelihood fit of the signal cross section plus background to the data from the combination of the results from the three analysis methods gives a cross section for single top-quark production of ?(pp?tb+X,tqb+X)=4.71.3??pb. The probability to measure a cross section at this value or higher in the absence of signal is 0.014%, corresponding to a 3.6standard deviation significance. The measured cross section value is compatible at the 10% level with the standard model prediction for electroweak top-quark production. We use the cross section measurement to directly determine the Cabibbo-Kobayashi-Maskawa quark mixing matrix element that describes the Wtb coupling and find |Vtbf1L|=1.31-0.21+0.25, where f1L is a generic vector coupling. This model-independent measurement translates into 0.68<|Vtb|?1 at the 95% C.L. in the standard model.

V. M. Abazov et al. (The D0 Collaboration)

2008-07-14T23:59:59.000Z

251

Hunting the Quark Gluon Plasma ASSESSMENTS  

NLE Websites -- All DOE Office Websites (Extended Search)

Hunting the Quark Gluon Plasma Hunting the Quark Gluon Plasma ASSESSMENTS BY THE EXPERIMENTAL COLLABORATIONS Relativistic Heavy Ion Collider (RHIC) * Brookhaven National Laboratory, Upton, NY 11974-5000 RESULTS FROM THE FIRST 3 YEARS AT RHIC managed for the U.S. Department of Energy by Brookhaven Science Associates, a company founded by Stony Brook University and Battelle April 18, 2005 BNL -73847-2005 Formal Report

252

Shear viscosity of the quark matter  

E-Print Network (OSTI)

We discuss shear viscosity of the quark matter by using Kubo formula. The shear viscosity is calculated in the framework of the quasi-particle RPA for the Nambu-Jona-Lasinio model. We obtain a formula that the shear viscosity is expressed by the quadratic form of the quark spectral function in the chiral symmetric phase. The magnitude of the shear viscosity is discussed assuming the Breit-Wigner type for the spectral function.

Masaharu Iwasaki; Hiromasa Ohnishi; Takahiko Fukutome

2007-03-26T23:59:59.000Z

253

Magnetism and superconductivity in quark matter  

E-Print Network (OSTI)

Magnetic properties of quark matter and its relation to the microscopic origin of the magnetic field observed in compact stars are studied. Spontaneous spin polarization appears in high-density region due to the Fock exchange term, which may provide a scenario for the behaviors of magnetars. On the other hand, quark matter becomes unstable to form spin density wave in the moderate density region, where restoration of chiral symmetry plays an important role. Coexistence of magnetism and color superconductivity is also discussed.

T. Tatsumi; E. Nakano; K. Nawa

2005-06-01T23:59:59.000Z

254

Baryons with strangeness and charm in a quark model with chromodynamics  

Science Journals Connector (OSTI)

The low-lying spectrum of baryons containing a charmed quark and one or two strange quarks is calculated in a a quark model with chromodynamics.

Kim Maltman and Nathan Isgur

1980-10-01T23:59:59.000Z

255

E-Print Network 3.0 - anwendungen und entwicklungen Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Grenzen des Capability Computing auszuloten und die Anwendungen auf noch hhere... und D-Grid, sowie die Grid- Middleware UNICORE live ... Source: Jlich Supercomputing Centre...

256

Beitrag zur Bestimmung kleiner Mengen Kohlenoxyd in Wasserstoff- und methanhaltigen Gasen  

Science Journals Connector (OSTI)

Es wird eine Bestimmungsmethode fr Kohlenmonoxyd beschrieben, die auf der Verbrennung zu Kohlendioxyd und dessen potentiometrischer Titration beruht. Die Gasprobe wird in einen Sauerstoffgasstrom eingebracht und...

J. Sverak

1959-01-01T23:59:59.000Z

257

Modellierung der regelbaren Quellen, Lasten und Speicher im MICRO GRID eines industriellen Produktionsstandortes fr die Lastflussbe-  

E-Print Network (OSTI)

,,POWER TO GAS" -Anlage kompensiert werden. Die intelligente Koordination von Erzeugungs- und Regelverhalten der Solar- Wechselrichter, des Batteriespeichers und der POWER TO GAS ­ Einheit in einer

Paderborn, Universität

258

E-Print Network 3.0 - aspects funktionelle und Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

ihr eigenes Profil. In schnellen Schben... entstehen neue Konzepte und Produkte. Innovation in Forschung und Aktualisierung der Lehre ist der Schlssel... angenommen hat....

259

E-Print Network 3.0 - arbeitsschutz und konomische Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Spitzenforschungszentrum von Uni und IIS Die Universitt Erlangen-Nrnberg und die Fraunhofer-Gesellschaft errichten... gemeinsam ein einzigar- tiges internationales...

260

E-Print Network 3.0 - arbeitsschutz und arbeitsmedizin Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

Spitzenforschungszentrum von Uni und IIS Die Universitt Erlangen-Nrnberg und die Fraunhofer-Gesellschaft errichten... gemeinsam ein einzigar- tiges internationales...

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

E-Print Network 3.0 - applications stand und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Statistical Inference and Applications. Wiley, New York. Stoyan, D., Stoyan, H. und Jansen, U. (1997... und Audiologie Modulbezeichnung (Titel) Grundlagen der Numerischen...

262

E-Print Network 3.0 - anthropogene einfluesse und Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Anpassung1 Hans von Storch Institut fr... Kstenforschung, Helmholtz Zentrum Geesthacht und Klimacampus Hamburg Zusammenfassung Die Welt ndert... sich, und ein...

263

Virtuelles Eigentum Der Dualismus von Rechten am Werk und am Werkstck in der digitalen Welt  

Science Journals Connector (OSTI)

Die Entwicklung und zunehmende wirtschaftliche Bedeutung von virtuellen Welten und Onlinerollenspielen, in denen virtuelle Gegenstnde gegen reales Entgelt gehandelt werden, wirft die Frage ihrer rechtlichen E...

Matthias Berberich

2010-01-01T23:59:59.000Z

264

E-Print Network 3.0 - analysis vertebroplastie und Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Begrung durch die OE... -TutorInnen und gemeinsames Frhstck mit Brtchen, Saft und Kaffee 11:00 Vorstellung des ... Source: Kurtz, Stefan - Center for Bioinformatics,...

265

E-Print Network 3.0 - ambiente und der Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

vorangeschickt ein Essay von Alfons Labisch, Rektor der Universitt und Jury... Saft" ist ein ,,sensibles Gut". Und ein betriebs- wirtschaftlich interessantes dazu. Aus ......

266

E-Print Network 3.0 - architekten und bauherren Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Begrung durch die OE... -TutorInnen und gemeinsames Frhstck mit Brtchen, Saft und Kaffee 11:00 Vorstellung des ... Source: Kurtz, Stefan - Center for Bioinformatics,...

267

Quarkonia and heavy-quark relaxation times in the quark-gluon plasma  

E-Print Network (OSTI)

A thermodynamic T-matrix approach for elastic two-body interactions is employed to calculate spectral functions of open and hidden heavy-quark systems in the quark-gluon plasma. This enables the evaluation of quarkonium bound-state properties...

Riek, F.; Rapp, Ralf.

2010-01-01T23:59:59.000Z

268

Energieverbrauch und Emissionen des motorisierten Straenverkehrs in Deutschland  

Science Journals Connector (OSTI)

Der motorisierte Straenverkehr ist mittlerweile die mengenmig bedeutendste Verursachergruppe der zivilisatorisch bedingten Schadstoffemissionen. Fr das Bezugsjahr 1988 werden der Energieverbrauch und die E...

U. Hpfner

1991-01-01T23:59:59.000Z

269

Heat and Mass Transfer Wrme-und Stoffbertragung  

E-Print Network (OSTI)

1 23 Heat and Mass Transfer Wärme- und Stoffübertragung ISSN 0947-7411 Volume 49 Number 3 Heat Mass

Guo, Zhixiong "James"

270

Verhalten des Gueisens bei hohen und tiefen Temperaturen  

Science Journals Connector (OSTI)

Fr die Standfestigkeit (Wrmebstndigkeit) des Gueisens bei erhhten Temperaturen (unterhalb A c l) wird die Bestndigkeit des Eisenkarbids von aus-schlaggebender Bedeutung sein, und all...

Dr.-Ing. Eugen Piwowarsky

1929-01-01T23:59:59.000Z

271

E-Print Network 3.0 - anforderungen und verfahrenstechnische...  

NLE Websites -- All DOE Office Websites (Extended Search)

Renewable Energy ; Physics ; Chemistry 37 Feature Net ein Ansatz zur Modellierung von automobil-spezifischem Domnenwissen und Anforderungen Summary: Anforderungen J. Hartmann, A....

272

E-Print Network 3.0 - anwendungsbereich und haftungsprinzipien...  

NLE Websites -- All DOE Office Websites (Extended Search)

Beispiele fr... -Industrie, Pharma-Industrie, High-Tech- und Elektronik-Industrie, Automobil- Industrie 12;Copyright ... Source: Mannheim, Universitt - Institut fr...

273

E-Print Network 3.0 - atomhaftungsrecht anwendungsbereich und...  

NLE Websites -- All DOE Office Websites (Extended Search)

Beispiele fr... -Industrie, Pharma-Industrie, High-Tech- und Elektronik-Industrie, Automobil- Industrie 12;Copyright ... Source: Mannheim, Universitt - Institut fr...

274

Verfahren und Versuche zur Bestimmung der Reibungsmomente rasch umlaufender Krper  

Science Journals Connector (OSTI)

Die Gte der Lagerung von Kreiseln wird gewhnlich nach der Auslaufzeit bewertet. Diese reicht aber nicht aus, den Reibungsvorgang erschpfend zu beurteilen, weshalb nachstehend einige Verfahren erlutert und ...

K. Magnus

275

Der Anlauf- und Bremsvorgang bei Asynchronmotoren mit Wirbelstromlufer  

Science Journals Connector (OSTI)

In einem demnchst an anderer Stelle1) erscheinenden Aufsatze ber Kurzschlulufermotoren mit vernderlichem Lufer-Scheinwiderstand sind die Hauptgleichungen der Motoren mit Wirbelstromlufer und der mit Dopp...

Michael Liwschitz

1925-01-01T23:59:59.000Z

276

Bestimmung von Kohlenstoff und Wasserstoff in organischen Verbindungen  

Science Journals Connector (OSTI)

Die Oxydationswirksamkeit von 28 Katalysatoren fr die Elementar analyse wurde unter Standardbedingungen untersucht. Als Testsubstanz wurde Methan im Gemisch mit Sauerstoff (4 Vol.-%) verwendet und die niedrig...

Ji? Hor?ek; Ji? Krbl; Vclav Pechanec

1960-01-01T23:59:59.000Z

277

Spektroskopische Vorgnge in Explosionszonen von Methan und anderen Kohlenwasserstoffen  

Science Journals Connector (OSTI)

Zur Untersuchung gelangen stehende Explosionen von Methan-Sauerstoff und vergleichsweise die von Acetylen- bzw. Benzoldampf-Sauerstoff. Die einzelnen Zonen bei der Verbrennung werden spektrographisch festgehal...

F. J. Lauer

1933-01-01T23:59:59.000Z

278

Peak Oil, Energiesicherheit und die Grenzen des Marktes  

Science Journals Connector (OSTI)

Der lpreis wird von zahlreichen Faktoren beeinflusst. Die OPEC spielt bei der Preisbildung derzeit nur eine geringe Rolle. Ein Peak Oil wird die lpreise stark beeinflussen und zahlreiche...

Dr. Nikolaus Supersberger

2009-04-01T23:59:59.000Z

279

Das EPR Gedankenexperiment, die Bellsche Ungleichung und der  

E-Print Network (OSTI)

Das EPR ­ Gedankenexperiment, die Bellsche Ungleichung und der experimentelle Nachweis von-Spin-Matrizen...........................................................................8 3. Zum EPR-Gedankenexperiment....................................................................................................9 3.1. EPR

Kull, Hans-Jörg

280

Netzwerk Traumaforschung der Deutschen Gesellschaft fr Orthopdie und Unfallchirurgie  

Science Journals Connector (OSTI)

Prof. Huber-Lang zeichnete das Bild eines gemeinsam gesteuerten Schiffes Traumaforschung, das es gleichsam zwischen Skylla und Charybdis sicher zu manvrieren gilt,...

Prof. Dr. M. Huber-Lang; S.B. Floh; I. Marzi

2011-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Das KJHG und der Kinderschutz: Eine verpasste Professionalisierungschance der Sozialpdagogik  

Science Journals Connector (OSTI)

Die Prposition zwischen regt zu folgendem Exkurs an. In der griechischen Mythologie muss Odysseus unter groen Gefahren die Meerenge zwischen der italienischen Stiefelspitze und der Insel Sizilien, zwischen ...

Prof. Dr. Bruno Hildenbrand

2014-01-01T23:59:59.000Z

282

Untersuchung der Struktur von Proteinadsorbaten an festen und fluiden Grenzflchen.  

E-Print Network (OSTI)

??Proteine, umgangssprachlich auch Eiweie genannt, bestehen aus einer linearen Polypeptidkette aus bis zu 20 verschiedenen Aminosuren. Sie sind nahezu an allen biologischen Prozessen beteiligt und (more)

Jackler, Guido

2005-01-01T23:59:59.000Z

283

Measurements of top quark properties at the Tevatron collider  

SciTech Connect

The discovery of the top quark in 1995 opened a whole new sector of investigation of the Standard Model; today top quark physics remains a key priority of the Tevatron program. Some of the measurements of top quark properties, for example its mass, will be a long-standing legacy. The recent evidence of an anomalously large charge asymmetry in top quark events suggests that new physics could couple preferably with top quarks. I will summarize this long chapter of particle physics history and discuss the road the top quark is highlighting for the LHC program.

Margaroli, Fabrizio

2011-05-01T23:59:59.000Z

284

Questions and Answers - What is the charge of an up quark and the charge of  

NLE Websites -- All DOE Office Websites (Extended Search)

What kinds of quarks are inprotons and neutrons? What kinds of quarks are in<br>protons and neutrons? Previous Question (What kinds of quarks are in protons and neutrons?) Questions and Answers Main Index Next Question (Are quarks confineable for study?) Are quarks confineable for study? What is the charge of an up quark and the charge of a down quark? How many quarks make up a proton and a neutron? Protons and neutrons are each composed of three quarks. Protons are made up of two 'up' quarks and one 'down' quark while neutrons are made up of two 'down' quarks and one 'up' quark. Quarks carry fractional electrical charges. An 'up' quark has a charge of +2/3 and a 'down' quark has a charge of -1/3. Is this consistent with what we know about protons and neutrons? Remember that protons carry an electrical charge of +1 while neutrons carry no electrical charge. We said

285

Universitat Konstanz Fachbereich Mathematik und Statistik  

E-Print Network (OSTI)

¨ur die Zahlen a, b, c, d R. (1) Ist a c und b d, so ist max{a, b} max{c, d}. (2) max{a, b} = a falls sei f : [a, b] R eine Abbildung. Was bedeutet folgende Aussage geometrisch? Gib je ein Beispiel f Aussage wahr ist: f F([-1, 1], R) x [-1, 1] [0, 1] f(x) = (1 - )f(-1) + f(1) Definition Sei A R eine

Scheiderer, Claus

286

edited1_TopQuarkMass  

NLE Websites -- All DOE Office Websites (Extended Search)

CALCULATE THE TOP QUARK MASS CALCULATE THE TOP QUARK MASS TEACHER NOTES DESCRIPTION Students use momentum conservation, energy conservation and two-dimensional vector addition to calculate the mass of the heaviest of the six known quarks. They gather data from data plots from the DØ experiment at Fermilab. The events were chosen carefully; all of the decay products moved in a plane perpendicular to the beam. This makes the vector addition much simpler. STANDARDS National Science Education Standards (U.S. National Research Council) * Physical Science Content Standard B: As a result of this activity . . . students should develop an understanding of: o Conservation of energy and increase in disorder. o Interactions in energy and matter. LEARNING OBJECTIVES Students will know and be able to:

287

The NJL Model for Quark Fragmentation Functions  

SciTech Connect

A description of fragmentation functions which satisfy the momentum and isospin sum rules is presented in an effective quark theory. Concentrating on the pion fragmentation function, we first explain the reason why the elementary (lowest order) fragmentation process q ? q? is completely inadequate to describe the empirical data, although the crossed process ? ? qq describes the quark distribution functions in the pion reasonably well. Then, taking into account cascade-like processes in a modified jet-model approach, we show that the momentum and isospin sum rules can be satisfied naturally without introducing any ad-hoc parameters. We present numerical results for the Nambu-Jona-Lasinio model in the invariant mass regularization scheme, and compare the results with the empirical parametrizations. We argue that this NJL-jet model provides a very useful framework to calculate the fragmentation functions in an effective chiral quark theory.

T. Ito, W. Bentz, I. Cloet, A W Thomas, K. Yazaki

2009-10-01T23:59:59.000Z

288

Constraints from jet calculus on quark recombination  

Science Journals Connector (OSTI)

Within the quantum-chromodynamic jet-calculus formalism, we deduce an equation describing recombination of quarks and antiquarks into mesons within a quark or gluon jet. This equation relates the recombination function R(x1,x2,x) used in current literature to the fragmentation function for producing that same meson out of the parton initiating the jet. We submit currently used recombination functions to our consistency test, taking as input mainly the u-quark fragmentation "data" into ?+ mesons. The qq?? recombination functions popular in the literature are consistent with measured fragmentation functions, but they must be supplemented by other contributions to provide the full Du?+. We also discuss the Q2 dependence of the resulting fragmentation functions.

L. M. Jones; K. E. Lassila; U. Sukhatme; D. Willen

1981-02-01T23:59:59.000Z

289

Essence of the Vacuum Quark Condensate  

SciTech Connect

We show that the chiral-limit vacuum quark condensate is qualitatively equivalent to the pseudoscalar meson leptonic decay constant in the sense that they are both obtained as the chiral-limit value of well-defined gauge-invariant hadron-to-vacuum transition amplitudes that possess a spectral representation in terms of the current-quark mass. Thus, whereas it might sometimes be convenient to imagine otherwise, neither is essentially a constant mass-scale that fills all spacetime. This means, in particular, that the quark condensate can be understood as a property of hadrons themselves, which is expressed, for example, in their Bethe-Salpeter or light-front wavefunctions.

Brodsky, Stanley J.; /SLAC /Southern Denmark U., CP3-Origins; Roberts, Craig D.; /Argonne, PHY /Peking U.; Shrock, Robert; /YITP, Stony Brook; Tandy, Peter C.; /Kent State U.

2010-08-25T23:59:59.000Z

290

Bulk viscosity in nuclear and quark matter: A short review  

E-Print Network (OSTI)

The history and recent progresses in the study of bulk viscosity in nuclear and quark matter are reviewed. The constraints from baryon number conservation and electric neutrality in quark matter on particle densities and fluid velocity divergences are discussed.

Hui Dong; Nan Su; Qun Wang

2007-02-07T23:59:59.000Z

291

Momentum broadening in weakly coupled quark-gluon plasma  

E-Print Network (OSTI)

We calculate the probability distribution P(k [subscript ?]) for the momentum perpendicular to its original direction of motion that an energetic quark or gluon picks up as it propagates through weakly coupled quark-gluon ...

D'Eramo, F.

292

Phenomenological applications of non-perturbative heavy quark effective theory  

E-Print Network (OSTI)

We briefly review the strategy to perform non-perturbative heavy quark effective theory computations and we specialize to the case of the b quark mass which has recently been computed including the 1/m term.

Mauro Papinutto

2007-10-11T23:59:59.000Z

293

Top quark pair cross section prospects in ATLAS  

E-Print Network (OSTI)

The observation of the top quark will be an important milestone in ATLAS. This talk reviews methods that ATLAS plans to use to observe the top quark pair production process and measure its cross section.

Andrei Gaponenko; for the ATLAS Collaboration

2009-10-20T23:59:59.000Z

294

Looking for quark droplets in ultrarelativistic collisions  

Science Journals Connector (OSTI)

Heavy ion collisions at ultrarelativistic energies are expected to provide an environment where quarks and gluons replace hadrons as the appropriate degrees of freedom. As the excited region expands and cools, the transition to the hadronic state might be characterized by phase separation with hadrons being emitted from dense droplets of quark-gluon matter. Here we study four techniques to search for such droplets: rapidity correlations, identical kaon correlations, ? meson production, and proton correlations. We conclude that rapidity correlations are the clearest signal of such fluctuations, and that proton correlations and ? production can also be strongly affected by drop formation.

Scott Pratt

1994-05-01T23:59:59.000Z

295

Down Type Isosinglet Quarks in ATLAS  

E-Print Network (OSTI)

We evaluate the discovery reach of the ATLAS experiment for down type isosinglet quarks, $D$, using both their neutral and charged decay channels, namely the process $pp\\to D\\bar{D}+X$ with subsequent decays resulting in $2\\ell+2j+E^{miss}_{T}$, $3\\ell+2j+E^{miss}_{T}$ and $2\\ell+4j$ final states. The integrated luminosity required for observation of a heavy quark is estimated for a mass range between 600 and 1000 GeV using the combination of results from different search channels.

R. Mehdiyev; A. Siodmok; S. Sultansoy; G. Unel

2007-11-07T23:59:59.000Z

296

Top Quark Mass Measurements at the Tevatron  

SciTech Connect

We report the latest results on the top-quark mass and on the top-antitop mass difference from the CDF and D0 collaborations using data collected at the Fermilab Tevatron p{bar p} collider at {radical}s = 1.96 TeV. We discuss general issues in top-quark mass measurements and present new results from direct measurements and from top-pair production cross-section. We also report new results on the top-antitop mass difference.

Ye, Zhenyu; /Fermilab

2011-07-01T23:59:59.000Z

297

Top Quark Physics at the LHC  

E-Print Network (OSTI)

An overview of the prospects of top quark physics at the LHC is presented. The ATLAS and the CMS detectors are about to produce a large amount of data with high top quark contents from the LHC proton-proton collisions. A wide variet y of physics analyses is planned in both experiments, and a number of useful insights have already been obtained regarding their detector performance and physics potential. This summary is based on the talk presented at the Hadron C ollider Physics Symposium 2008, Galena, Illinois, May 27-31, 2008.

Akira Shibata

2008-07-31T23:59:59.000Z

298

Heavy-quark correlations in deep inelastic scattering  

E-Print Network (OSTI)

We discuss results for heavy quark correlations in next-to-leading order QCD in deep inelastic electroproduction.

J. Smith; B. W. Harris

1996-05-20T23:59:59.000Z

299

Cold quark matter, quadratic corrections, and gauge/string duality  

Science Journals Connector (OSTI)

We make an estimate of the quadratic correction in the pressure of cold quark matter using gauge/string duality.

Oleg Andreev

2010-04-05T23:59:59.000Z

300

Review of recent top-quark LHC combinations  

E-Print Network (OSTI)

A review of recent combinations of top-quark measurements performed at the LHC, by the ATLAS and CMS collaborations, is provided. The typical uncertainty categorisations, and their assumed correlation patterns are presented, together with the results of the combinations of the top-quark pair and single top-quark production cross sections, the top-quark mass, as well as of the $W$ boson polarisation and the charge asymmetry in $t\\bar t$ events.

Cortiana, Giorgio

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Einflu von Nichtelektrolyten auf die Fllung von Kolloiden durch Elektrolyte und auf die Adsorption von Ionen  

Science Journals Connector (OSTI)

1. Es wurde die Koagulation des Mangandioxydsols durch Kupfersulfat und Silbernitrat in Gegenwart von Aethylalko...

K. C. Sen

1926-04-01T23:59:59.000Z

302

Ein Beitrag zur Messung des Lrms mit dem verbesserten Lrmzhler von Dold und Thiele  

Science Journals Connector (OSTI)

1. Es werden die Lrmschdigungen des menschlichen Ohres bei verschiedenen Schallstrken und bei zeitlich versch...

Heinrich Thiele; Kurt Holzberg

303

Studienleiter Chemie und Molekulare Wissenschaften Sekretariat Studienleitung Prof. Thomas Wandlowski Sandra Zbinden  

E-Print Network (OSTI)

Studienleiter Chemie und Molekulare Wissenschaften Sekretariat Studienleitung Prof. Thomas Wandlowski Sandra Zbinden Departement für Chemie und Biochemie Departement für Chemie und Biochemie 6318057 e-mail: thomas.wandlowski@dcb.unibe.ch e-mail: sandra.zbinden@dcb.unibe.ch Bachelor in Chemie und

Mühlemann, Oliver

304

Quantitative gas-chromatographische Simultanbestimmung von Wasserstoff, Methan, than und thylen  

Science Journals Connector (OSTI)

Die quantitative gas-chromatographische Bestimmung von Wasserstoff, Methan, than und thylen fhrt bei Verwendung einer...

H. W. Drbeck

305

Niederdruck-berschallexpansionen. Eine studie zur formation von kalten wasserstoff und deuteriumatomstrahlen fr polarisierte gastargets  

E-Print Network (OSTI)

Niederdruck-berschallexpansionen. Eine studie zur formation von kalten wasserstoff und deuteriumatomstrahlen fr polarisierte gastargets

Nass, A

2002-01-01T23:59:59.000Z

306

Bachelor Chemie und Molekulare Wissenschaften Stundenplan 5. Semester Herbstsemester 2014  

E-Print Network (OSTI)

Bachelor Chemie und Molekulare Wissenschaften Stundenplan 5. Semester ­ Herbstsemester 2014 Die. Eberle S481 3 ECTS Physikalische Chemie IV: Radio- und Elektrochemie PD Dr. P. Broekmann Prof. A. Türler N213 4 ECTS Praktikum Anorganische Chemie II Prof. S. Decurtins 1. Semesterh. Einführung Dienstag

Mühlemann, Oliver

307

C. Lehrveranstaltungen der Philosophischen Fakultt II -Psychologie, Pdagogik und Sportwissenschaft  

E-Print Network (OSTI)

. Do 11.00 ­ 11.45 H 50 Jansen 32238 Entwicklung im Lebenslauf (M 04/3) 1 Gr. Do 10 - 11 H 50 Jansen 32244 Motorik und Kognition (M 04/5) 2 st. 1 Gr. Do 14.00 ­ 15.30 S Jansen 32240 Motorik und Emotion (M

Schubart, Christoph

308

Bestimmung des ep{Wirkungsquerschnittes von Beauty-Quarks  

E-Print Network (OSTI)

Bestimmung des ep{Wirkungsquerschnittes von Beauty-Quarks durch ihren semileptonischen Zerfall in Myonen mit dem H1-Detektor bei HERA Determination of the ep Cross Section for Beauty Quarks via werden die sichtbaren ep-Wirkungsquerschnitte fur schwere Quarks in dem kinematischen Bereich Q2

309

Heavy quark collisional energy loss in the quark-gluon plasma including finite relaxation time  

E-Print Network (OSTI)

In this paper, we calculate the soft-collisional energy loss of heavy quarks traversing the viscous quark-gluon plasma including the effects of a finite relaxation time $\\tau_\\pi$ on the energy loss. We find that the collisional energy loss depends appreciably on $\\tau_\\pi$ . In particular, for typical values of the viscosity-to-entropy ratio, we show that the energy loss obtained using $\\tau_\\pi$ = 0 can be $\\sim$ 10$\\%$ larger than the one obtained using $\\tau_\\pi$ = 0. Moreover, we find that the energy loss obtained using the kinetic theory expression for $\\tau_\\pi$ is much larger that the one obtained with the $\\tau_\\pi$ derived from the Anti de Sitter/Conformal Field Theory correspondence. Our results may be relevant in the modeling of heavy quark evolution through the quark-gluon plasma.

Mauro Elias; J. Peralta-Ramos; E. Calzetta

2014-04-30T23:59:59.000Z

310

Phase transition from quark-meson coupling hyperonic matter to deconfined quark matter  

SciTech Connect

We investigate the possibility and consequences of phase transitions from an equation of state (EOS) describing nucleons and hyperons interacting via mean fields of {sigma}, {omega}, and {rho} mesons in the recently improved quark-meson coupling (QMC) model to an EOS describing a Fermi gas of quarks in an MIT bag. The transition to a mixed phase of baryons and deconfined quarks, and subsequently to a pure deconfined quark phase, is described using the method of Glendenning. The overall EOS for the three phases is calculated for various scenarios and used to calculate stellar solutions using the Tolman-Oppenheimer-Volkoff equations. The results are compared with recent experimental data, and the validity of each case is discussed with consequences for determining the species content of the interior of neutron stars.

Carroll, J. D.; Leinweber, D. B.; Williams, A. G.; Thomas, A. W. [Centre for the Subatomic Structure of Matter (CSSM), Department of Physics, University of Adelaide, SA 5005 (Australia); Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606 (United States); College of William and Mary, Williamsburg, Virginia 23187 (United States) and Centre for the Subatomic Structure of Matter (CSSM), Department of Physics, University of Adelaide, SA 5005 (Australia)

2009-04-15T23:59:59.000Z

311

Quark-gluon plasma (Selected Topics)  

SciTech Connect

Introductory lectures to the theory of (strongly interacting) quark-gluon plasma given at the Winter School of Physics of ITEP (Moscow, February 2010). We emphasize theoretical issues highlighted by the discovery of the low viscosity of the plasma. The topics include relativistic hydrodynamics, manifestations of chiral anomaly in hydrodynamics, superfluidity, relativistic superfluid hydrodynamics, effective stringy scalars, holographic models of Yang-Mills theories.

Zakharov, V. I., E-mail: vzakharov@itep.ru [Institute for Theoretical and Experimental Physics (Russian Federation)

2012-09-15T23:59:59.000Z

312

Color screening in cold quark matter  

E-Print Network (OSTI)

We compute---at finite quark chemical potentials---the color screening of cold quark matter at the one-loop level, comparing the normal, BCS-paired U(1)em (or Higgs) phase and a singlet phase with color-singlet condensate near the Fermi surface. The latter phase is computed using the example of two-color QCD with a color-singlet diquark condensate. In contrast to the normal and Higgs phases, neither electric nor magnetic screening masses appear in the singlet phase. The absence of a magnetic mass, within a perturbative framework, is a consequence of the proper treatment of gauge invariance. While at large momenta the gluon self-energies approach those in the normal phase, the medium contributions to the infrared region below a scale of the mass gap are substantially suppressed. Infrared gluons at low quark density in the singlet phase appear protected from medium effects, unless the quark-gluon vertices are significantly enhanced in the infrared.

Toru Kojo; Gordon Baym

2014-04-04T23:59:59.000Z

313

Model study of a quark star  

SciTech Connect

In this paper we apply the equation of state (EOS) of QCD at finite chemical potential and zero temperature proposed in H. S. Zong and W. M. Sun [Int. J. Mod. Phys. A 23, 3591 (2008)] to the study of properties of quark star. This EOS contains only one adjustable parameter m{sub D} which sets the scale of chiral symmetry breaking (in our calculation we have chosen two values of m{sub D}: m{sub D}=244 MeV and m{sub D}=239 MeV, which is fitted from the value of f{sub {pi}} and determined by e{sup +}e{sup -} annihilation experiment, respectively). From this EOS a model of quark star is established by applying the Tolman-Oppenheimer-Volkoff equation under two conditions: with the P({mu}=0) term and without the P({mu}=0) term. Our results show clearly that the P({mu}=0) term is an important quantity in the study of quark star. A comparison between our model and other models of quark star is made. In particular, we have compared our results with the most recent observational data measured using Shapiro delay reported in P. B. Demorest et al.[Nature (London) 467, 1081 (2010)].

Li Hua; Jiang Yu [Department of Physics, Nanjing University, Nanjing 210093 (China); Luo Xinlian [Department of Astronomy, Nanjing University, Nanjing 210093 (China); Zong Hongshi [Department of Physics, Nanjing University, Nanjing 210093 (China); Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093 (China)

2011-01-15T23:59:59.000Z

314

Electroproduction of heavy quarks at NLO  

E-Print Network (OSTI)

A new next-to-leading order Monte Carlo program for the calculation of fully differential heavy quark cross sections in electroproduction is described. A comparison between the theoretical predictions and the latest charm production data from H1 and ZEUS at HERA is presented.

B. W. Harris

1996-08-20T23:59:59.000Z

315

Quark matter and meson properties in a Nonlocal SU(3) chiral quark model at finite temperature  

SciTech Connect

We study the finite temperature behavior of light scalar and pseudoscalar meson properties in the context of a three-flavor nonlocal chiral quark model. The model includes mixing with active strangeness degrees of freedom, and takes care of the effect of gauge interactions by coupling the quarks with a background color field. We analyze the chiral restoration and deconfinement transitions, as well as the temperature dependence of meson masses, mixing angles, and decay constants.

Gomez Dumm, D., E-mail: dumm@fisica.unlp.edu.ar [UNLP, IFLP, Departamento de Fisica (Argentina); Contrera, G. A., E-mail: contrera@tandar.cnea.gov.ar [CONICET (Argentina)

2012-06-15T23:59:59.000Z

316

Search for Single Top Quark Production at HERA  

E-Print Network (OSTI)

A search for single top quark production is performed in the full ep data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb^-1. Decays of top quarks into a b quark and a W boson with subsequent leptonic or hadronic decay of the W are investigated. A multivariate analysis is performed to discriminate top quark production from Standard Model background processes. An upper limit on the top quark production cross section via flavour changing neutral current processes sigma (ep -> etX) < 0.25 pb is established at 95% CL. Limits on the anomalous coupling kappa_{tu gamma} are derived.

Aaron, F D; Alexa, C; Alimujiang, K; Andreev, V; Antunovic, B; Asmone, A; Backovic, S; Baghdasaryan, A; Barrelet, E; Bartel, W; Begzsuren, K; Belousov, A; Bizot, J C; Boudry, V; Bozovic-Jelisavcic, I; Bracinik, J; Brandt, G; Brinkmann, M; Brisson, V; Bruncko, D; Bunyatyan, A; Buschhorn, G; Bystritskaya, L; Campbell, A J; Cantun Avila, K B; Cassol-Brunner, F; Cerny, K; Cerny, V; Chekelian, V; Cholewa, A; Contreras, J G; Coughlan, J A; Cozzika, G; Cvach, J; Dainton, J B; Daum, K; Deak, M; de Boer, Y; Delcourt, B; Del Degan, M; Delvax, J; De Roeck, A; De Wolf, E A; Diaconu, C; Dodonov, V; Dossanov, A; Dubak, A; Eckerlin, G; Efremenko, V; Egli, S; Eliseev, A; Elsen, E; Falkiewicz, A; Favart, L; Fedotov, A; Felst, R; Feltesse, J; Ferencei, J; Fischer, D J; Fleischer, M; Fomenko, A; Gabathuler, E; Gayler, J; Ghazaryan, S; Glazov, A; Glushkov, I; Goerlich, L; Gogitidze, N; Gouzevitch, M; Grab, C; Greenshaw, T; Grell, B R; Grindhammer, G; Habib, S; Haidt, D; Helebrant, C; Henderson, R C W; Hennekemper, E; Henschel, H; Herbst, M; Herrera, G; Hildebrandt, M; Hiller, K H; Hoffmann, D; Horisberger, R; Hreus, T; Jacquet, M; Janssen, M E; Janssen, X; Jonsson, L; Jung, Andreas Werner; Jung, H; Kapichine, M; Katzy, J; Kenyon, I R; Kiesling, C; Klein, M; Kleinwort, C; Kluge, T; Knutsson, A; Kogler, R; Kostka, P; Kraemer, M; Krastev, K; Kretzschmar, J; Kropivnitskaya, A; Kruger, K; Kutak, K; Landon, M P J; Lange, W; Lastovicka-Medin, G; Laycock, P; Lebedev, A; Leibenguth, G; Lendermann, V; Levonian, S; Li, G; Lipka, K; Liptaj, A; List, B; List, J; Loktionova, N; Lopez-Fernandez, R; Lubimov, V; Lytkin, L; Makankine, A; Malinovski, E; Marage, P; Marti, Ll; Martyn, H U.; Maxfield, S J; Mehta, A; Meyer, A B; Meyer, H; Meyer, H; Meyer, J; Michels, V; Mikocki, S; Milcewicz-Mika, I; Moreau, F; Morozov, A; Morris, J V; Mozer, Matthias Ulrich; Mudrinic, M; Muller, K; Murin, P; Naumann, Th; Newman, P R; Niebuhr, C; Nikiforov, A; Nowak, G; Nowak, K; Nozicka, M; Olivier, B; Olsson, J E; Osman, S; Ozerov, D; Palichik, V; Panagoulias, I; Pandurovic, M; Papadopoulou, Th; Pascaud, C; Patel, G D; Pejchal, O; Perez, E; Petrukhin, A; Picuric, I; Piec, S; Pitzl, D; Placakyte, R; Pokorny, B; Polifka, R; Povh, B; Preda, T; Radescu, V; Rahmat, A J; Raicevic, N; Raspiareza, A; Ravdandorj, T; Reimer, P; Rizvi, E; Robmann, P; Roland, B; Roosen, R; Rostovtsev, A; Rotaru, M; Ruiz Tabasco, J E; Rurikova, Z; Rusakov, S; Salek, D; Sankey, D P C; Sauter, M; Sauvan, E; Schmitt, S; Schmitz, C; Schoeffel, L; Schoning, A; Schultz-Coulon, H C; Sefkow, F; Shaw-West, R N; Shtarkov, L N; Shushkevich, S; Sloan, T; Smiljanic, Ivan; Soloviev, Y; Sopicki, P; South, D; Spaskov, V; Specka, Arnd E; Staykova, Z; Steder, M; Stella, B; Stoicea, G; Straumann, U.; Sunar, D; Sykora, T; Tchoulakov, V; Thompson, G; Thompson, P D; Toll, T; Tomasz, F; Tran, T H; Traynor, D; Trinh, T N; Truol, P; Tsakov, I; Tseepeldorj, B; Turnau, J; Urban, K; Valkarova, A; Vallee, C; Van Mechelen, P; Vargas Trevino, A; Vazdik, Y; Vinokurova, S; Volchinski, V; von den Driesch, M; Wegener, D; Wissing, Ch; Wunsch, E; Zacek, J; Zalesak, J; Zhang, Z; Zhokin, A; Zimmermann, T; Zohrabyan, H; Zomer, F; Zus, R; 10.1016/j.physletb.2009.06.057

2009-01-01T23:59:59.000Z

317

Stable quarks of the 4th family?  

E-Print Network (OSTI)

Existence of metastable quarks of new generation can be embedded into phenomenology of heterotic string together with new long range interaction, which only this new generation possesses. We discuss primordial quark production in the early Universe, their successive cosmological evolution and astrophysical effects, as well as possible production in present or future accelerators. In case of a charge symmetry of 4th generation quarks in Universe, they can be stored in neutral mesons, doubly positively charged baryons, while all the doubly negatively charged "baryons" are combined with He-4 into neutral nucleus-size atom-like states. The existence of all these anomalous stable particles may escape present experimental limits, being close to present and future experimental test. Due to the nuclear binding with He-4 primordial lightest baryons of the 4th generation with charge +1 can also escape the experimental upper limits on anomalous isotopes of hydrogen, being compatible with upper limits on anomalous lithium. While 4th quark hadrons are rare, their presence may be nearly detectable in cosmic rays, muon and neutrino fluxes and cosmic electromagnetic spectra. In case of charge asymmetry, a nontrivial solution for the problem of dark matter (DM) can be provided by excessive (meta)stable anti-up quarks of 4th generation, bound with He-4 in specific nuclear-interacting form of dark matter. Such candidate to DM is surprisingly close to Warm Dark Matter by its role in large scale structure formation. It catalyzes primordial heavy element production in Big Bang Nucleosynthesis and new types of nuclear transformations around us.

K. Belotsky; M. Khlopov; K. Shibaev

2008-06-05T23:59:59.000Z

318

Questions and Answers - Are quarks confineable for study?  

NLE Websites -- All DOE Office Websites (Extended Search)

is the charge of an up quarkand of down quark? is the charge of an up quark<br>and of down quark? Previous Question (What is the charge of an up quark and of down quark?) Questions and Answers Main Index Next Question (Is vacuum matter? What are ten things that are not matter? ) Is vacuum matter? What are tenthings that are not matter? Are quarks confineable for study? Quarks we study at Jefferson Lab are confined to each other by nature's laws. We shine our electrons on them to observe their behavior in their confined state. This is not so different from turning on a light to see a gold fish swimming in a glass bowl. Author: Nathan Isgur, Theory Group Leader (Other answers by Nathan Isgur) Related Pages: All About Atoms What is the smallest particle of matter known? Could there be anything smaller inside of an electron or inside of a

319

The uncertainties due to quark energy loss on determining nuclear sea quark distribution from nuclear Drell-Yan data  

E-Print Network (OSTI)

By means of two different parametrizations of quark energy loss and the nuclear parton distributions determined only with lepton-nuclear deep inelastic scattering experimental data, a leading order phenomenological analysis is performed on the nuclear Drell-Yan differential cross section ratios as a function of the quark momentum fraction in the beam proton and target nuclei for E772 experimental data. It is shown that there is the quark energy loss effect in nuclear Drell-Yan process apart from the nuclear effects on the parton distribution as in deep inelastic scattering. The uncertainties due to quark energy loss effect is quantified on determining nuclear sea quark distribution by using nuclear Drell-Yan data. It is found that the quark energy loss effect on nuclear Drell-Yan cross section ratios make greater with the increase of quark momentum fraction in the target nuclei. The uncertainties from quark energy loss become bigger as the nucleus A come to be heavier. The Drell-Yan data on proton incident middle and heavy nuclei versus deuterium would result in an overestimate for nuclear modifications on sea quark distribution functions with neglecting the quark energy loss. Our results are hoped to provide good directional information on the magnitude and form of nuclear modifications on sea quark distribution functions by means of the nuclear Drell-Yan experimental data.

C. G. Duan; N. Liu; G. L. Li

2008-11-05T23:59:59.000Z

320

Top quark jets at the LHC  

Science Journals Connector (OSTI)

We investigate the reconstruction of high pT hadronically decaying top quarks at the Large Hadron Collider. One of the main challenges in identifying energetic top quarks is that the decay products become increasingly collimated. This reduces the efficacy of conventional reconstruction methods that exploit the topology of the top quark decay chain. We focus on the cases where the decay products of the top quark are reconstructed as a single jet, a top jet. The most basic top-tagging method based on jet mass measurement is considered in detail. To analyze the feasibility of the top-tagging method, both theoretical and experimental aspects of the large QCD jet background contribution are examined. Based on a factorization approach, we derive a simple analytic approximation for the shape of the QCD jet mass spectrum. We observe very good agreement with the MonteCarlo simulation. We consider high-pT tt production in the standard model as an example, and show that our theoretical QCD jet mass distributions can efficiently characterize the background via sideband analyses. We show that with 25??fb-1 of data, our approach allows us to resolve top jets with pT?1??TeV, from the QCD background, and about 1.5TeV top jets with 100??fb-1, without relying on b-tagging. To further improve the significance we consider jet shapes (recently analyzed in 10), which resolve the substructure of energy flow inside cone jets. A method of measuring the top quark polarization by using the transverse momentum of the bottom quark is also presented. The main advantages of our approach are (i)the mass distributions are driven by first principle calculations, instead of relying solely on MonteCarlo simulation; (ii)for high pT jets (pT?1??TeV), IR-safe jet shape variables are robust against detector resolution effects. Our analysis can be applied to other boosted massive particles such as the electroweak gauge bosons and the Higgs.

Leandro G. Almeida; Seung J. Lee; Gilad Perez; Ilmo Sung; Joseph Virzi

2009-04-16T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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321

Prfungsberatungslisten fr die Fakultt V zum SS 2010 Prfungsberatung gem 15 und 30 BerlHG und 13 a der Ordnung der TU Berlin ber  

E-Print Network (OSTI)

. Wiedemann CAR-B 1 314-23353 314-22014 Montagetechnik und Fabrikbetrieb 314-23099 Fluidsystemdynamik

Berlin,Technische Universität

322

RHIC | Why Does Quark Matter Matter?  

NLE Websites -- All DOE Office Websites (Extended Search)

Why Does Quark Matter 'Matter'? Why Does Quark Matter 'Matter'? The history of modern technological development can be viewed as a series of investigations, with ever increasing resolution, into the microscopic structure of matter. Since the days of the early Greek philosophers, science has been on a continual quest to find the smallest piece - the most fundamental building block - forming the substance of the universe. STAR researchers During that journey, many beautiful and exotic properties of the subatomic world have been discovered: particles with wave-like properties the ultimate position of which can never be known; "particles" of light that deliver a fixed amount of energy when they strike the atoms of a material's surface; particles in some types of electrical conductors that

323

Secondary Production of Massive Quarks in Thrust  

E-Print Network (OSTI)

We present a factorization framework that takes into account the production of heavy quarks through gluon splitting in the thrust distribution for e+ e- --> hadrons. The explicit factorization theorems and some numerical results are displayed in the dijet region where the kinematic scales are widely separated, which can be extended systematically to the whole spectrum. We account for the necessary two-loop matrix elements, threshold corrections, and include resummation up to N3LL order. We include nonperturbative power corrections through a field theoretical shape function, and remove the O(Lambda_QCD) renormalon in the partonic soft function by appropriate mass-dependent subtractions. Our results hold for any value of the quark mass, from an infinitesimally small (merging to the known massless result) to an infinitely large one (achieving the decoupling limit). This is the first example of an application of a variable flavor number scheme to final state jets.

Andre H. Hoang; Vicent Mateu; Piotr Pietrulewicz

2014-12-22T23:59:59.000Z

324

Quark and Gluon Tagging at the LHC  

Science Journals Connector (OSTI)

Being able to distinguish light-quark jets from gluon jets on an event-by-event basis could significantly enhance the reach for many new physics searches at the Large Hadron Collider. Through an exhaustive search of existing and novel jet substructure observables, we find that a multivariate approach can filter out over 95% of the gluon jets while keeping more than half of the light-quark jets. Moreover, a combination of two simple variables, the charge track multiplicity and the pT-weighted linear radial moment (girth), can achieve similar results. Our study is only Monte Carlo based, so other observables constructed using different jet sizes and parameters are used to highlight areas that deserve further theoretical and experimental scrutiny. Additional information, including distributions of around 10?000 variables, can be found at http://jets.physics.harvard.edu/qvg/.

Jason Gallicchio and Matthew D. Schwartz

2011-10-17T23:59:59.000Z

325

The Bonn nuclear quark model revisited  

SciTech Connect

We present the exact solutions to the equations of the lowest energy states of the colored and color-symmetric sectors of the Bonn quark model, which is SU(3) symmetric and is defined in terms of an effective pairing force with su(4) algebraic structure. We show that the groundstate of the model is not color symmetrical except for a narrow interval in the range of possible quark numbers. We also study the performance of the Glauber coherent state, as well as of superconducting states of the BCS type, with respect to the description, not only of the absolute (colored) groundstate, but also of the minimum energy state of the color-symmetrical sector, finding that it is remarkably good. We use the model to discuss, in a schematic context, some controversial aspects of the conventional treatment of color superconductivity.

Providencia, Constanca [Departamento de Fi sica, Universidade de Coimbra, Rua Larga, P-3004-516 Coimbra (Portugal); Providencia, Joao da [Departamento de Fi sica, Universidade de Coimbra, Rua Larga, P-3004-516 Coimbra (Portugal)], E-mail: providencia@teor.fis.uc.pt; Cordeiro, Flavio [Departamento de Fi sica, Universidade de Coimbra, Rua Larga, P-3004-516 Coimbra (Portugal); Yamamura, Masatoshi [Department of Pure and Applied Physics, Faculty of Engineering Science, Kansai University, Suita 564-8680 (Japan); Tsue, Yasuhiko; Nishiyama, Seiya [Physics Division, Faculty of Science, Kochi University, Kochi 780-8520 (Japan)

2009-08-15T23:59:59.000Z

326

The Surface Tension of Magnetized Quark Matter  

E-Print Network (OSTI)

The surface tension of quark matter plays a crucial role for the possibility of quark matter nucleation during the formation of compact stellar objects and also for the existence of a mixed phase within hybrid stars. However, despite its importance, this quantity does not have a well established numerical value. Some early estimates have predicted that, at zero temperature, the value falls within the wide range $\\gamma_0\\approx10-300{\\rm\\ MeV/fm^2}$ but, very recently, different model applications have reduced these numerical values to fall within the range $\\gamma_0\\approx5-30{\\rm\\ MeV/fm^2}$ which would favor the phase conversion process as well as the appearance of a mixed phase in hybrid stars. In magnetars one should also account for the presence of very high magnetic fields which may reach up to about $ eB\\approx 3-30\\, m_\\pi^2$ ($B \\approx 10^{19}-10^{20} \\,G$) at the core of the star so that it may also be important to analyze how the presence of a magnetic field affects the surface tension. With this aim we consider magnetized two flavor quark matter, described by the Nambu--Jona-Lasinio model. We show that although the surface tension oscillates around its B=0 value, when $0 surface tension value drops by about 30% while for $eB \\gtrsim 10\\, m_\\pi^2$ it quickly raises with the field intensity so that the phase conversion and the presence of a mixed phase should be suppressed if extremely high fields are present. We also investigate how thermal effects influence the surface tension for magnetized quark matter.

A. F. Garcia; M. B. Pinto

2013-06-13T23:59:59.000Z

327

Heavy quark masses from Fermilab Fermions  

E-Print Network (OSTI)

Using automated perturbation theory techniques, we have computed the one-loop mass of Fermilab fermions, with an improved gluon action. We will present the results of these calculations, and the resulting predictions for the charm and bottom quark masses in the MSbar scheme. We report mc(mc) = 1:22(9) GeV and mb(mb) = 4:7(4) GeV. In addition we present results for the one-loop coeffcients of the Fermilab action.

Matthew Nobes; Howard Trottier

2005-09-26T23:59:59.000Z

328

Heavy quarks and long-lived hadrons  

Science Journals Connector (OSTI)

In a recent Letter we reported on some work which led us to suggest the possibility of narrow spikes in the e+e- annihilation cross section into hadrons. In this paper, we discuss the theoretical infrastructure of this work more thoroughly, and improve and extend the calculations and experimental predictions. We examine a colored quark-gluon model of hadronic matter, with color an exact SU(3) gauge symmetry. In addition to the light quarks that make up ordinary hadrons, a heavy quark, such as the charmed c, is included. The narrow resonances recently discovered by the MIT-BNL and SLAC-LBL groups are interpreted as cc bound states (orthocharmonium). In this energy range, the effective coupling has become small according to asymptotic freedom, and many aspects of the bound-state structure can be calculated. The existence of 0- (paracharmonium) states is predicted, and decay widths and mass splittings are estimated. The total e+e- cross section into hadrons is predicted to scale asymptotically, with an approach to scaling from above that can be calculated over a large energy range.

Thomas Appelquist and H. David Politzer

1975-09-01T23:59:59.000Z

329

Quark-Gluon Bags with Surface Tension  

E-Print Network (OSTI)

The temperature and chemical potential dependent surface tension of bags is introduced into the gas of quark-gluon bags model. This resolves a long standing problem of a unified description of the first and second order phase transition with the cross-over. Such an approach is necessary to model the complicated properties of quark-gluon plasma and hadronic matter from the first principles of statistical mechanics. The suggested model has an exact analytical solution and allows one to rigorously study the vicinity of the critical endpoint of the deconfinement phase transition. The existence of higher order phase transitions at the critical endpoint is discussed. In addition, we found that at the curve of a zero surface tension coefficient there must exist the surface induced phase tranition of the 2$^{nd}$ or higher order, which separates the pure quark gluon plasma (QGP) from the cross-over states, that are the mixed states of hadrons and QGP bags. Thus, the present model predicts that the critical endpoint of quantum chromodynamics is the tricritical endpoint.

Kyrill Bugaev

2007-03-20T23:59:59.000Z

330

Domain wall QCD with physical quark masses  

E-Print Network (OSTI)

We present results for several light hadronic quantities ($f_\\pi$, $f_K$, $B_K$, $m_{ud}$, $m_s$, $t_0^{1/2}$, $w_0$) obtained from simulations of 2+1 flavor domain wall lattice QCD with large physical volumes and nearly-physical pion masses at two lattice spacings. We perform a short, O(3)%, extrapolation in pion mass to the physical values by combining our new data in a simultaneous chiral/continuum `global fit' with a number of other ensembles with heavier pion masses. We use the physical values of $m_\\pi$, $m_K$ and $m_\\Omega$ to determine the two quark masses and the scale - all other quantities are outputs from our simulations. We obtain results with sub-percent statistical errors and negligible chiral and finite-volume systematics for these light hadronic quantities, including: $f_\\pi$ = 130.2(9) MeV; $f_K$ = 155.5(8) MeV; the average up/down quark mass and strange quark mass in the $\\overline {\\rm MS}$ scheme at 3 GeV, 2.997(49) and 81.64(1.17) MeV respectively; and the neutral kaon mixing parameter, $B_K$, in the RGI scheme, 0.750(15) and the $\\overline{\\rm MS}$ scheme at 3 GeV, 0.530(11).

RBC; UKQCD collaborations; :; T. Blum; P. A. Boyle; N. H. Christ; J. Frison; N. Garron; R. J. Hudspith; T. Izubuchi; T. Janowski; C. Jung; A. Juettner; C. Kelly; R. D. Kenway; C. Lehner; M. Marinkovic; R. D. Mawhinney; G. McGlynn; D. J. Murphy; S. Ohta; A. Portelli; C. T. Sachrajda; A. Soni

2014-11-25T23:59:59.000Z

331

Astrophysical Aspects of Quark-Gluon Plasma  

E-Print Network (OSTI)

This M.Sc. thesis in Engineering Physics is an overview of the present theory of quark-gluon plasma (QGP) as well as an analysis of the stability criterion for possible stable cosmic QGP objects left over from the quark-hadron transition in the early Universe. It covers fundamental ideas of the formation and decay of the plasma, including the standard model, QCD, and the MIT bag model. I discuss the equation of state of a QGP and the possible signatures for a plasma created in heavy-ion collisions. Astrophysical aspects of QGP are put forward, including compact stars and the quark-hadron transition in the early Universe. The possible role of QGP objects as cosmic dark matter is mentioned. The analytic part is an investigation of possible stability among cosmic QGP objects from the early Universe. A model is suggested where a pressure balance makes a QGP stable against gravitational contraction and hadronization. The mass/radius relationship for stability also forbids a direct gravitational collapse. Finally, ...

Enstrm, D

1998-01-01T23:59:59.000Z

332

Flavor Physics in the Quark Sector  

E-Print Network (OSTI)

One of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor and measurements and theoretical interpretations of their results have advanced tremendously: apart from masses and quantum numbers of flavor particles, there now exist detailed measurements of the characteristics of their interactions allowing stringent tests of Standard Model predictions. Among the most interesting phenomena of flavor physics is the violation of the CP symmetry that has been subtle and difficult to explore. Till early 1990s observations of CP violation were confined to neutral $K$ mesons, but since then a large number of CP-violating processes have been studied in detail in neutral $B$ mesons. In parallel, measurements of the couplings of the heavy quarks and the dynamics for their decays in large samples of $K, D$, and $B$ mesons have been greatly improved in accuracy and the results are being used as probes in the search for deviations from the Standard Model. In the near future, there will be a transition from the current to a new generation of experiments, thus a review of the status of quark flavor physics is timely. This report summarizes the results of the current generation of experiments that is about to be completed and it confronts these results with the theoretical understanding of the field.

M. Antonelli; D. M. Asner; D. Bauer; T. Becher; M. Beneke; A. J. Bevan; M. Blanke; C. Bloise; M. Bona; A. Bondar; C. Bozzi; J. Brod; A. J. Buras; N. Cabibbo; A. Carbone; G. Cavoto; V. Cirigliano; M. Ciuchini; J. P. Coleman; D. P. Cronin-Hennessy; J. P. Dalseno; C. H. Davies; F. DiLodovico; J. Dingfelder; Z. Dolezal; S. Donati; W. Dungel; U. Egede; G. Eigen; R. Faccini; T. Feldmann; F. Ferroni; J. M. Flynn; E. Franco; M. Fujikawa; I. K. Furic; P. Gambino; E. Gardi; T. J. Gershon; S. Giagu; E. Golowich; T. Goto; C. Greub; C. Grojean; D. Guadagnoli; U. A. Haisch; R. F. Harr; A. H. Hoang; T. Hurth; G. Isidori; D. E. Jaffe; A. Jttner; S. Jger; A. Khodjamirian; P. Koppenburg; R. V. Kowalewski; P. Krokovny; A. S. Kronfeld; J. Laiho; G. Lanfranchi; T. E. Latham; J. Libby; A. Limosani; D. Lopes Pegna; C. D. Lu; V. Lubicz; E. Lunghi; V. G. Lth; K. Maltman; W. J. Marciano; E. C. Martin; G. Martinelli; F. Martinez-Vidal; A. Masiero; V. Mateu; F. Mescia; G. Mohanty; M. Moulson; M. Neubert; H. Neufeld; S. Nishida; N. Offen; M. Palutan; P. Paradisi; Z. Parsa; E. Passemar; M. Patel; B. D. Pecjak; A. A. Petrov; A. Pich; M. Pierini; B. Plaster; A. Powell; S. Prell; J. Rademaker; M. Rescigno; S. Ricciardi; P. Robbe; E. Rodrigues; M. Rotondo; R. Sacco; C. J. Schilling; O. Schneider; E. E. Scholz; B. A. Schumm; C. Schwanda; A. J. Schwartz; B. Sciascia; J. Serrano; J. Shigemitsu; I. J. Shipsey; A. Sibidanov; L. Silvestrini; F. Simonetto; S. Simula; C. Smith; A. Soni; L. Sonnenschein; V. Sordini; M. Sozzi; T. Spadaro; P. Spradlin; A. Stocchi; N. Tantalo; C. Tarantino; A. V. Telnov; D. Tonelli; I. S. Towner; K. Trabelsi; P. Urquijo; R. S. Van de Water; R. J. Van Kooten; J. Virto; G. Volpi; R. Wanke; S. Westhoff; G. Wilkinson; M. Wingate; Y. Xie; J. Zupan

2009-07-29T23:59:59.000Z

333

Projekt-/Studien-/Diplom-/Bachelor-und Masterarbeiten zu vergeben  

E-Print Network (OSTI)

ein elektronisches Lenkrad In zukünftigen elektronischen Lenkrädern für Automobile erfolgt die- Rechnernetz entwickelt und in einen Steer-By-Wire-Teststand eingebaut, das Feldbusse im Automobil ablösen soll

Zachmann, Gabriel

334

Der Einflu der Belastungsverhltnisse und der Netzstruktur auf die Gesamtplanung  

Science Journals Connector (OSTI)

Bei Beginn der Entwurfsarbeiten mu man sich zunchst ber die Einsatzweise des Werkes und die zu erwartende Benutzungsdauer, die der Auslegung zugrunde zu legen ist, ein Bild machen. Bei dem heute praktisch k...

Dr. techn. Ludwig Musil

1948-01-01T23:59:59.000Z

335

Die Bedeutung kurzfristiger und langfristiger Speichertechnologien in der Energiewende  

Science Journals Connector (OSTI)

Wegen der begrenzten Speicherkapazitten von Druckluftspeichern und dem geringen Potenzial zum Ausbau von Pumpspeichern stellt Power-to-Gas eine Technologie dar, die zuknftig an Bedeutung...2 Methan gewonnen, da...

Gnter Brauner

2013-09-01T23:59:59.000Z

336

Nutzung von konventionellem und grnem Wasserstoff in der chemischen Industrie  

Science Journals Connector (OSTI)

Die Ergebnisse eines Vergleichs der wesentlichen Merkmale der Nutzungsarten fr grnen Wasserstoff (Power-to-gas, Verstromung, Mobilitt mit Brennstoffzellen-PKW und...10.1. Dargestellt ist, wie viel fossile Ener...

Christoph Stiller

2014-01-01T23:59:59.000Z

337

Venture Capital in den USA und der Bundesrepublik  

Science Journals Connector (OSTI)

Der Begriff Venture Capital wird oft mit der Lsung technisch-wirtschaftlicher Problemstellungen der 80er Jahre verbunden. Auch deutsche Politiker und Medien entdeckten 1983 diese Idee. Sie waren von den jen...

Werner Quillmann

1988-01-01T23:59:59.000Z

338

Die Kommission Rechnungswesen und das Bilanzrichtlinien-Gesetz  

Science Journals Connector (OSTI)

Im Dezember 1985 ist vom Deutschen Bundestag das sog. Bilanzrichtlinien-Gesetz verabschiedet worden. Damit liegt das Transformationsgesetz zur deutschen Umsetzung von EG-Richtlinien vor, und zwar fr die 4. EG-Ri...

Professor Dr. Klaus Chmielewicz

1988-01-01T23:59:59.000Z

339

Strafbare Verletzungen der Amtspflicht und verwandte strafbare Handlungen  

Science Journals Connector (OSTI)

Bertel, Die ffentliche Urkunde und die Falschbeurkundung im Amt, An-wBl 1980, 319; ders, Die Haftung des Beamten aus strafrechtlicher Sicht, ZfV 1986, 141; ders, Der Amtsmissbrauch des Paketverl...

2008-01-01T23:59:59.000Z

340

fr Studierende der Chemie Die Fakultt fr Chemie und das  

E-Print Network (OSTI)

für Studierende der Chemie Die Fakultät für Chemie und das Akademische Auslandsamt informieren #12 Office #12;Studium im Ausland für Studierende der Chemie Welches Angebot gibt es? www

Schubart, Christoph

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Der Zusammenschluss Sony/Bertelsmann und seine wettbewerbskonomischen Konsequenzen  

Science Journals Connector (OSTI)

Die Genehmigung des Joint-Ventures von Sony und Bertelsmann gibt ein Beispiel fr die neue Ausrichtung der europischen Wettbewerbspolitik, die eine Abkehr von der formal-juristischen hin zu einer konomische...

Bjrn A. Kuchinke; Thomas Henders

2010-02-01T23:59:59.000Z

342

Pie Fehlerquelle der Bunsen'schen Superoxyd- und Chloratbestimmung  

Science Journals Connector (OSTI)

Die Bestimmung von Braunstein, Chloraten etc. durch Kocben mit Salzsure und Messen des aus Jodkaliumlsung entbundenen Jods liefert um 0,52% zu niedrige Werte, weil etwas Chlor durch die Wasserdmpfe zu Chlo...

E. Rupp

1918-01-01T23:59:59.000Z

343

Differential-und Integralrechnung III Losungen fur Woche 4  

E-Print Network (OSTI)

(i) = xi und g(j) = yj. Dann saft die H¨older-Ungleichung: n i=1 |xiyi| (|xi|p ) 1 p |yj|q () 1 q wo 1/p

Mitchener, Paul

344

Das Mischungsverhalten von Nb3Sn mit Mo3Si, Mo3Ge und Nb3Ge  

Science Journals Connector (OSTI)

Mittels homogenisierter Sinter-und Schmelzproben wird die Bildung von lckenlosen Mischreihen zwischen Nb3Sn mit Mo3Si, Mo3Ge und Nb3Ge nachgewiesen.

H. Holleck; F. Benesovsky; H. Nowotny

1962-01-01T23:59:59.000Z

345

Jet conversions in a quark-gluon plasma  

Science Journals Connector (OSTI)

Quark and gluon jets traversing through a quark-gluon plasma not only lose their energies but also can undergo flavor conversions. The conversion rates via the elastic q(q)g?gq(q) and the inelastic qq?gg scatterings are evaluated in the lowest order in QCD. Including both jet energy loss and conversions in the expanding quark-gluon plasma produced in relativistic heavy ion collisions, we have found a net of quark jets to gluon jets. This reduces the difference between the nuclear modification factors for quark and gluon jets in central heavy ion collisions and thus enhances the p/?+ and p/?- ratios at high transverse momentum. However, a much larger net quark-to-gluon jet conversion rate than the one given by the lowest order QCD is needed to account for the observed similar ratios in central Au+Au and p+p collisions at the same energy. Implications of our results are discussed.

W. Liu; C. M. Ko; B. W. Zhang

2007-05-04T23:59:59.000Z

346

Top-quark mass measurements: Alternative techniques (LHC + Tevatron)  

E-Print Network (OSTI)

Measurements of the top-quark mass employing alternative techniques are presented, performed by the D0 and CDF collaborations at the Tevatron as well as the ATLAS and CMS experiments at the LHC. The alternative methods presented include measurements using the lifetime of $B$-hadrons, the transverse momentum of charged leptons and the endpoints of kinematic distributions in top quark anti-quark pair ($t\\bar{t}$) final states. The extraction of the top-quark pole mass from the $t\\bar{t}$ production cross-section and the normalized differential $t\\bar{t}$ + 1-jet cross-section are discussed as well as the top-quark mass extraction using fixed-order QCD predictions at detector level. Finally, a measurement of the top-quark mass using events enhanced in single top t-channel production is presented.

Adomeit, Stefanie

2014-01-01T23:59:59.000Z

347

The Onset of Quark-Hadron Duality in Pion Electroproduction  

E-Print Network (OSTI)

A large data set of charged-pion electroproduction from both hydrogen and deuterium targets has been obtained spanning the low-energy residual-mass region. These data conclusively show the onset of the quark-hadron duality phenomenon, as predicted for high-energy hadron electroproduction. We construct several ratios from these data to exhibit the relation of this phenomenon to the high-energy factorization ansatz of electron-quark scattering and subsequent quark-to- pion production mechanisms.

T. Navasardyan

2006-08-18T23:59:59.000Z

348

The Onset of Quark-Hadron Duality in Pion Electroproduction  

SciTech Connect

A large data set of charged-pion electroproduction from both hydrogen and deuterium targets has been obtained spanning the low-energy residual-mass region. These data conclusively show the onset of the quark-hadron duality phenomenon, as predicted for high-energy hadron electroproduction. We construct several ratios from these data to exhibit the relation of this phenomenon to the high-energy factorization ansatz of electron-quark scattering and subsequent quark-to- pion production mechanisms.

Tigran Navasardyan; Gary Adams; Abdellah Ahmidouch; Tatiana Angelescu; John Arrington; Razmik Asaturyan; O. Baker; Nawal Benmouna; Crystal Bertoncini; Henk Blok; Werner Boeglin; Peter Bosted; Herbert Breuer; Michael Christy; Simon Connell; Yonggang Cui; Mark Dalton; Samuel Danagoulian; Donal Day; T. Dodario; James Dunne; Dipangkar Dutta; Najib Elkhayari; Rolf Ent; Howard Fenker; Valera Frolov; Liping Gan; David Gaskell; Kawtar Hafidi; Wendy Hinton; Roy Holt; Tanja Horn; Garth Huber; Ed Hungerford; Xiaodong Jiang; Mark Jones; Kyungseon Joo; Narbe Kalantarians; James Kelly; Cynthia Keppel; Edward Kinney; V. Kubarovski; Ya Li; Yongguang Liang; Simona Malace; Pete Markowitz; Erin McGrath; Daniella Mckee; David Meekins; Hamlet Mkrtchyan; Brian Moziak; Gabriel Niculescu; Maria-Ioana Niculescu; Allena Opper; Tanya Ostapenko; Paul Reimer; Joerg Reinhold; Julie Roche; Stephen Rock; Elaine Schulte; Edwin Segbefia; C. Smith; G.R. Smith; Paul Stoler; Vardan Tadevosyan; Liguang Tang; Maurizio Ungaro; Alicia Uzzle; Sandra Vidakovic; Anthony Villano; William Vulcan; Miao Wang; Glen Warren; Frank Wesselmann; Bogdan Wojtsekhowski; Stephen Wood; Chuncheng Xu; Lulin Yuan; Xiaochao Zheng; Hong Guo Zhu

2006-08-29T23:59:59.000Z

349

Covariant nonlocal chiral quark models with separable interactions  

SciTech Connect

We present a comparative analysis of chiral quark models which include nonlocal covariant four-fermion couplings. We consider two alternative ways of introducing the nonlocality, as well as various shapes for the momentum-dependent form factors governing the effective interactions. In all cases we study the behavior of model parameters and analyze numerical results for constituent quark masses and quark propagator poles. Advantages of these covariant nonlocal schemes over instantaneous nonlocal schemes and the standard NJL model are pointed out.

Dumm, D. Gomez [IFLP - Dpto. de Fisica, Universidad Nacional de La Plata, C.C. 67, 1900 La Plata (Argentina); CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); Grunfeld, A. G. [Physics Department, Comision Nacional de Energia Atomica, Av. Libertador 8250, 1429 Buenos Aires (Argentina); Scoccola, N. N. [CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); Physics Department, Comision Nacional de Energia Atomica, Av. Libertador 8250, 1429 Buenos Aires (Argentina); Universidad Favaloro, Solis 453, 1078 Buenos Aires (Argentina)

2006-09-01T23:59:59.000Z

350

QCD Thermodynamics with an almost realistic quark mass spectrum  

E-Print Network (OSTI)

We will report on the status of a new large scale calculation of thermodynamic quantities in QCD with light up and down quarks corresponding to an almost physical light quark mass value and a heavier strange quark mass. These calculations are currently being performed on the QCDOC Teraflops computers at BNL. We will present new lattice calculations of the transition temperature and various susceptibilities reflecting properties of the chiral transition. All these quantities are of immediate interest for heavy ion phenomenology.

C. Schmidt

2006-01-25T23:59:59.000Z

351

Decuplet baryon magnetic moments in the chiral quark model  

Science Journals Connector (OSTI)

We present calculations of the decuplet baryon magnetic moments in the chiral quark model. As input we use parameters obtained in qualitatively accurate fits to the octet baryon magnetic moments studied previously. The values found for the magnetic moments of ?++ and ?- are in good agreement with experiments. We finally calculate the total quark spin polarizations of the decuplet baryons and find that they are considerably smaller than what is expected from the non-relativistic quark model.

Johan Linde; Tommy Ohlsson; Hkan Snellman

1998-05-01T23:59:59.000Z

352

Report of the Quark Flavor Physics Working Group  

E-Print Network (OSTI)

This report represents the response of the Intensity Frontier Quark Flavor Physics Working Group to the Snowmass charge. We summarize the current status of quark flavor physics and identify many exciting future opportunities for studying the properties of strange, charm, and bottom quarks. The ability of these studies to reveal the effects of new physics at high mass scales make them an essential ingredient in a well-balanced experimental particle physics program.

Butler, J N; Ritchie, J L; Cirigliano, V; Kettell, S; Briere, R; Petrov, A A; Schwartz, A; Skwarnicki, T; Zupan, J; Christ, N; Sharpe, S R; Van de Water, R S; Altmannshofer, W; Arkani-Hamed, N; Artuso, M; Asner, D M; Bernard, C; Bevan, A J; Blanke, M; Bonvicini, G; Browder, T E; Bryman, D A; Campana, P; Cenci, R; Cline, D; Comfort, J; Cronin-Hennessy, D; Datta, A; Dobbs, S; Duraisamy, M; El-Khadra, A X; Fast, J E; Forty, R; Flood, K T; Gershon, T; Grossman, Y; Hamilton, B; Hill, C T; Hill, R J; Hitlin, D G; Jaffe, D E; Jawahery, A; Jessop, C P; Kagan, A L; Kaplan, D M; Kohl, M; Krizan, P; Kronfeld, A S; Lee, K; Littenberg, L S; MacFarlane, D B; Mackenzie, P B; Meadows, B T; Olsen, J; Papucci, M; Parsa, Z; Paz, G; Perez, G; Piilonen, L E; Pitts, K; Purohit, M V; Quinn, B; Ratcliff, B N; Roberts, D A; Rosner, J L; Rubin, P; Seeman, J; Seth, K K; Schmidt, B; Schopper, A; Sokoloff, M D; Soni, A; Stenson, K; Stone, S; Sundrum, R; Tschirhart, R; Vainshtein, A; Wah, Y W; Wilkinson, G; Wise, M B; Worcester, E; Xu, J; Yamanaka, T

2013-01-01T23:59:59.000Z

353

Dynamical electroweak symmetry breaking and the top quark  

SciTech Connect

In this talk, I discuss theories of dynamical electroweak symmetry breaking, with emphasis on the implications of a heavy top quark on the weak interaction {rho} parameter.

Chivukula, R.S. [Boston Univ., MA (United States)

1997-01-01T23:59:59.000Z

354

Top quark charge asymmetry measurements with ATLAS detector  

E-Print Network (OSTI)

The top quark charge asymmetry measurements performed with ATLAS detector at a centre-of-mass energy of 7 TeV are presented.

U. De Sanctis; for the ATLAS Collaboration

2014-11-13T23:59:59.000Z

355

Top quark charge asymmetry measurements with ATLAS detector  

E-Print Network (OSTI)

The top quark charge asymmetry measurements performed with ATLAS detector at a centre-of-mass energy of 7 TeV are presented.

De Sanctis, Umberto; The ATLAS collaboration

2014-01-01T23:59:59.000Z

356

Search for Excited Quarks in ep Collisions at HERA  

E-Print Network (OSTI)

A search for excited quarks is performed using the full ep data sample collected by the H1 experiment at HERA, corresponding to a total integrated luminosity of 475 pb^-1. The electroweak decays of excited quarks q* -> q gamma, q* -> q Z and q* -> q W with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for first generation excited quark production is found. Mass dependent exclusion limits on q* production cross sections and on the ratio f/Lambda of the coupling to the compositeness scale are derived within gauge mediated models. These limits extend the excluded region compared to previous excited quark searches.

Aaron, F D; Alimujiang, K; Andreev, V; Antunovic, B; Asmone, A; Backovic, S; Baghdasaryan, A; Barrelet, E; Bartel, W; Begzsuren, K; Belousov, A; Bizot, J C; Boudry, V; Bozovic-Jelisavcic, I; Bracinik, J; Brandt, G; Brinkmann, M; Brisson, V; Bruncko, D; Bunyatyan, A; Buschhorn, G; Bystritskaya, L; Campbell, A J; Cantun Avila, K B; Cassol-Brunner, F; Cerny, K; Cerny, V; Chekelian, V; Cholewa, A; Contreras, J G; Coughlan, J A; Cozzika, G; Cvach, J; Dainton, J B; Daum, K; Deak, M; de Boer, Y; Delcourt, B; Del Degan, M; Delvax, J; De Roeck, A; De Wolf, E A; Diaconu, C; Dodonov, V; Dossanov, A; Dubak, A; Eckerlin, G; Efremenko, V; Egli, S; Eliseev, A; Elsen, E; Falkiewicz, A; Faulkner, P J W; Favart, L; Fedotov, A; Felst, R; Feltesse, J; Ferencei, J; Fischer, D J; Fleischer, M; Fomenko, A; Gabathuler, E; Gayler, J; Ghazaryan, S; Glazov, A; Glushkov, I; Goerlich, L; Gogitidze, N; Gouzevitch, M; Grab, C; Greenshaw, T; Grell, B R; Grindhammer, G; Habib, S; Haidt, D; Helebrant, C; Henderson, R C W; Hennekemper, E; Henschel, H; Herbst, M; Herrera, G; Hildebrandt, M; Hiller, K H; Hoffmann, D; Horisberger, R; Hreus, T; Jacquet, M; Janssen, M E; Janssen, X; Jemanov, V; Jonsson, L; Jung, Andreas Werner; Jung, H; Kapichine, M; Katzy, J; Kenyon, I R; Kiesling, C; Klein, M; Kleinwort, C; Kluge, T; Knutsson, A; Kogler, R; Korbel, V; Kostka, P; Kraemer, M; Krastev, K; Kretzschmar, J; Kropivnitskaya, A; Kruger, K; Kutak, K; Landon, M P J; Lange, W; Lastovicka-Medin, G; Laycock, P; Lebedev, A; Leibenguth, G; Lendermann, V; Levonian, S; Li, G; Lipka, K; Liptaj, A; List, B; List, J; Loktionova, N; Lopez-Fernandez, R; Lubimov, V; Lytkin, L; Makankine, A; Malinovski, E; Marage, P; Marti, Ll; Martyn, H U; Maxfield, S J; Mehta, A; Meyer, A B; Meyer, H; Meyer, H; Meyer, J; Michels, V; Mikocki, S; Milcewicz-Mika, I; Moreau, F; Morozov, A; Morris, J V; Mozer, Matthias Ulrich; Mudrinic, M; Muller, K; Murin, P; Naroska, B; Naumann, Th; Newman, P R; Niebuhr, C; Nikiforov, A; Nowak, G; Nowak, K; Nozicka, M; Olivier, B; Olsson, J E; Osman, S; Ozerov, D; Palichik, V; Panagoulias, I; Pandurovic, M; Papadopoulou, Th; Pascaud, C; Patel, G D; Pejchal, O; Perez, E; Petrukhin, A; Picuric, I; Piec, S; Pitzl, D; Placakyte, R; Pokorny, B; Polifka, R; Povh, B; Preda, T; Radescu, V; Rahmat, A J; Raicevic, N; Raspiareza, A; Ravdandorj, T; Reimer, P; Rizvi, E; Robmann, P; Roland, B; Roosen, R; Rostovtsev, A; Rotaru, M; Ruiz Tabasco, J E; Rurikova, Z; Rusakov, S; Salek, D; Sankey, D P C; Sauter, M; Sauvan, E; Schmitt, S; Schmitz, C; Schoeffel, L; Schoning, A; Schultz-Coulon, H C; Sefkow, F; Shaw-West, R N; Sheviakov, I; Shtarkov, L N; Shushkevich, S; Sloan, T; Smiljanic, Ivan; Soloviev, Y; Sopicki, P; South, D; Spaskov, V; Specka, Arnd E; Staykova, Z; Steder, M; Stella, B; Stoicea, G; Straumann, U; Sunar, D; Sykora, T; Tchoulakov, V; Thompson, G; Thompson, P D; Toll, T; Tomasz, F; Tran, T H; Traynor, D; Trinh, T N; Truol, P; Tsakov, I; Tseepeldorj, B; Turnau, J; Urban, K; Valkarova, A; Vallee, C; Van Mechelen, P; Vargas Trevino, A; Vazdik, Y; Vinokurova, S; Volchinski, V; von den Driesch, M; Wegener, D; Wissing, Ch; Wunsch, E; Zacek, J; Zalesak, J; Zhang, Z; Zhokin, A; Zimmermann, T; Zohrabyan, H; Zomer, F; Zus, R; 10.1016/j.physletb.2009.06.044

2009-01-01T23:59:59.000Z

357

Thermodynamics and heavy-quark free energies at finite temperature and density with two flavors of improved Wilson quarks  

E-Print Network (OSTI)

Thermodynamics of two-flavor QCD at finite temperature and density is studied on a $16^3 \\times 4$ lattice, using a renormalization group improved gauge action and the clover improved Wilson quark action. In the simulations along lines of constant $m_{\\rm PS}/m_{\\rm V}$, we calculate the Taylor expansion coefficients of the heavy-quark free energy with respect to the quark chemical potential ($\\mu_q$) up to the second order. By comparing the expansion coefficients of the free energies between quark($Q$)and antiquark($\\bar{Q}$), and between $Q$ and $Q$, we find a characteristic difference at finite $\\mu_q$ due to the first order coefficient of the Taylor expansion. We also calculate the quark number and isospin susceptibilities, and find that the second order coefficient of the quark number susceptibility shows enhancement around the pseudo-critical temperature.

Y. Maezawa; S. Aoki; S. Ejiri; T. Hatsuda; N. Ishii; K. Kanaya; N. Ukita; T. Umeda

2007-10-04T23:59:59.000Z

358

E-Print Network 3.0 - alten- und pflegeheimen Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

alten- und pflegeheimen Search Powered by Explorit Topic List Advanced Search Sample search results for: alten- und pflegeheimen Page: << < 1 2 3 4 5 > >> 1 R O B E R T K O C H I N...

359

Unsicherheitsanalysen zur Parametrisierung von Prozessen der Biosphre und Hydrosphre in atmosphrischen Modellen  

E-Print Network (OSTI)

Zustandsvariablen zu berechnen und Fehlerbalken anzugeben. Unsicherheiten in den Strahlungs-, Wärme- und. Wegen der vielen verschiedenen empirischen Parameter, von denen der Fluss latenter Wärme abhängt

Moelders, Nicole

360

Photon emission from bare quark stars  

E-Print Network (OSTI)

We investigate the photon emission from the electrosphere of a quark star. It is shown that at temperatures T\\sim 0.1-1 MeV the dominating mechanism is the bremsstrahlung due to bending of electron trajectories in the mean Coulomb field of the electrosphere. The radiated energy for this mechanism is much larger than that for the Bethe-Heitler bremsstrahlung. The energy flux from the mean field bremsstrahlung exceeds the one from the tunnel e^{+}e^{-} pair creation as well. We demonstrate that the LPM suppression of the photon emission is negligible.

B. G. Zakharov

2010-08-16T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Seismic Search for Strange Quark Nuggets  

E-Print Network (OSTI)

Bounds on masses and abundances of Strange Quark Nuggets (SQNs) are inferred from a seismic search on Earth. Potential SQN bounds from a possible seismic search on the Moon are reviewed and compared with Earth capabilities. Bounds are derived from the data taken by seismometers implanted on the Moon by the Apollo astronauts. We show that the Apollo data implies that the abundance of SQNs in the region of 10 kg to one ton must be at least an order of magnitude less than would saturate the dark matter in the solar neighborhood.

Eugene T. Herrin; Doris C. Rosenbaum; Vigdor L. Teplitz

2005-05-29T23:59:59.000Z

362

Dissipative phenomena in quark-gluon plasmas  

SciTech Connect

Transport coefficients of small-chemical-potential quark-gluon plasmas are estimated and dissipative corrections to the scaling hydrodynamic equations for ultrarelativistic nuclear collisions are studied. The absence of heat-conduction phenomena is clarified. Lower and upper bounds on the shear-viscosity coefficient are derived. QCD phenomenology is used to estimate effects of color-electric and -magnetic shielding, and nonperturbative antiscreening. Bulk viscosity associated with the plasma-to-hadron transition is estimated within the relaxation-time approximation. Finally, effects of dissipative phenomena on the relation between initial energy density and final rapidity density are estimated.

Danielewicz, P.; Gyulassy, M.

1985-01-01T23:59:59.000Z

363

E-Print Network 3.0 - areas bedeutung und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering Summary: 270 Unterrichtsform Vorlesung mit bung und Praktikum Sprache Deutsch Modulart Pflichtmodul Bedeutung... Unterrichtsform Vorlesung mit bung Sprache...

364

TONTRGER UND HRERFAHRUNGEN IM 20. JAHRHUNDERT. FR EINE KULTURGESCHICHTE DER MUSIK  

E-Print Network (OSTI)

Habilitationsvortrag, Freie Universität, 8.05.2008 Alfred Lester, Violet Loraine und George Robey bei einer Aufnahme

Boyer, Edmond

365

E-Print Network 3.0 - als knstler und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

and Information Sciences 25 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Testsystemarchitekturen identifizieren und diese dann als generische...

366

E-Print Network 3.0 - altlasten und erweiterung Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Information Sciences 25 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Testsystemarchitekturen identifizieren und diese dann als generische...

367

Diagnostik-Set Gttingen auf White-LED und UV-LED-Basis  

Science Journals Connector (OSTI)

Der Handgriff wurde weiterentwickelt: Ein Wechselaufsatz ermglicht nun ein einfaches Austauschen der White-LED und der UV-LED.

2014-09-01T23:59:59.000Z

368

Separation of strangeness from antistrangeness in the phase transition from quark to hadron matter: Possible formation of strange quark matter in heavy-ion collisions  

Science Journals Connector (OSTI)

We present a mechanism for the separation of strangeness from antistrangeness in the deconfinement transition. For a net strangeness of zero in the total system, the population of s quarks is greatly enriched in the quark-gluon plasma, while the s quarks drift into the hadronic phase. This separation could result in strangelet formation, i.e., metastable blobs of strange-quark matter, which could serve as a unique signature for quark-gluon plasma formation in heavy-ion collisions.

Carsten Greiner; Peter Koch; Horst Stcker

1987-05-04T23:59:59.000Z

369

Seminar: Deutsche Entwicklungspolitik: Bilanz und Herausforderungen angesichts der Millenniumsziele Europische Tagungs-  

E-Print Network (OSTI)

Seminar: Deutsche Entwicklungspolitik: Bilanz und Herausforderungen angesichts der Millenniumsziele Europäische Tagungs- und Bildungsstätte Bonn http://www.gsi-bonn.de Einladung zum Seminar Deutsche Montag, 4. Juli 2005 09.30-10.15 Uhr Sachbeitrag und Diskussion* 10.30-12.00 Uhr Deutsche

Franz, Sven Oliver

370

Energie-und Leistungsbilanzierung im MICRO GRID eines industriellen Produktionsstandortes mit  

E-Print Network (OSTI)

an das lokale MICRO GRID angeschlossenen elektrischen Energiespeicher und eine ,,POWER TO GAS" -Anlage ermöglichen. Aufgabe: Um einen effizienten Einsatz des BHKW's, des Speichers und der POWER TO GAS ­ Einheit zu Konzeptes zum wirtschaftlich effizienten Einsatz des BHKW's, des Speichers und der POWER TO GAS ­ Einheit 6

Paderborn, Universität

371

Liebe Gste der ,,Nacht, die Wissen schafft", sehr geehrte Damen und Herren,  

E-Print Network (OSTI)

letzten Jahren zu einem leistungsstarken internationalen Zentrum für innovative Technologieprodukte und Sie die Akteure persönlich kennen. Auch das BIC (Business and Innovation Centre), Insiders, die Fraunhofer Institute IESE und ITWM, das Institut für Oberflächen- und Schichtanaly- tik (IFOS), gemeinsam mit

Berns, Karsten

372

Screening of quark-monopole in N=4 plasma  

E-Print Network (OSTI)

We study a quark-monopole bound system moving in N=4 SYM plasma with a constant velocity by the AdS/CFT correspondence. The screening length of this system is calculated, and is smaller than that of the quark-antiquark bound state.

Wei-shui Xu; Ding-fang Zeng

2014-09-08T23:59:59.000Z

373

Heavy quark impact factor for the LHC phenomenology  

E-Print Network (OSTI)

We comment on the calculation of the finite part of the heavy quark impact factor at next-to-leading logarithmic (NLx) accuracy. The result is presented in a form suitable for phenomenological studies such as the calculation of the cross-section for single heavy quark production at the LHC within the kT-factorization scheme.

Grigorios Chachamis; Michal Deak; German Rodrigo

2013-10-29T23:59:59.000Z

374

Search for baryon number violation in top-quark decays  

E-Print Network (OSTI)

A search for baryon number violation (BNV) in top-quark decays is performed using pp collisions produced by the LHC at [sqrt s]=8 TeV. The top-quark decay considered in this search results in one light lepton (muon or ...

CMS Collaboration

375

Wasser- und wasserstoffgehalt in oxidischen LWR-kernbrennstoffen und in borcarbid  

Science Journals Connector (OSTI)

Analyzing hydrogen and water released from UO2, UO2-Gd2O3 and UO2-PuO2 pellets by different hot extraction methods led to the result that nearly all the water is adsorbed on the surface and in open pores. The released gases are approximately 80% water and up to 20% hydrogen. Only 10% of the water content of B4C is adsorbed to the surface and in open pores. 90% of the water is chemicaly bonded as boric acids adhered to the B4C. During more than five years of special measuring experience and quality control equivalent water contents in the range of 1 3 ppm were found in UO2 and mixed oxide fuel rods. These data fulfil the LWR-specification requirement of 10 ppm with high confidence. Fuel rod failures by cladding hydriding are now excluded. Zusammenfassung Die Bindung des Wassers an das UO2 ist nach den vorliegenden Untersuchungen praktisch nur eine Sorption an der zugnglichen Oberflche. Vergleichende Untersuchungen wie hier an B4C durchgefhrt und Modellbetrachtungen ber die Oberflchenbelegung (2 3 ppm H2O fllen mit einer monomolekularen Schicht die experimentell bestimmte BET-Oberflche aus) untersttzen diese Annahme. Aus den intensiven Untersuchungen an sehr vielen oxidischen Kernbrennstoffpellets ber einen mehr als fnfjhrigen Fertigungszeitraum ergibt sich, da? quivalentwassergehalte von 1 3 ppm an Brennstben mit UO2-Pellets und Mischoxidpellets sicher realisierbar sind. Diese niedrigen Gehalte erfllen die Spezifikationsforderung mit hohem Sicherheitsabstand. Seit der Beherrschung des Feuchteproblems in der Brennstoff- und Brennstabfertigung sind Sunburst -Defekte an LWR-Brennstben nicht mehr aufgetreten.

E. Brandau; L. Khler

1979-01-01T23:59:59.000Z

376

The Top Quark, Its Discovery, and Subsequent Research  

Office of Scientific and Technical Information (OSTI)

The Top Quark, Its Discovery, and Subsequent Research The Top Quark, Its Discovery, and Subsequent Research Resources with Additional Information 'Ever since the existence of the bottom (or b) quark was inferred from the discovery of the Upsilon family of resonances at Fermilab in 1977, particle physicists have been on the lookout for its partner, called top (or t). The long search, which occupied experimenters at laboratories around the world, came to a successful conclusion in February 1995 with the announcement that the top quark had been observed in two experiments at the Tevatron proton-antiproton collider at Fermilab. ... Top Quark Courtesy Fermilab Top is the last of the fundamental constituents of subnuclear matter that theories of the strong, weak, and electromagnetic interactions and a wealth of experimental information had led particle physicists to expect. Theoretically, top's existence was required to make the electroweak theory internally consistent.'1

377

Diquark condensation effects on hot quark star configurations  

E-Print Network (OSTI)

The equation of state for quark matter is derived for a nonlocal, chiral quark model within the mean field approximation. We investigate the effects of a variation of the form factors of the interaction on the phase diagram of quark matter under the condition of beta-equilibrium and charge neutrality. Special emphasis is on the occurrence of a diquark condensate which signals a phase transition to color superconductivity and its effects on the equation of state. We calculate the quark star configurations by solving the Tolman- Oppenheimer- Volkoff equations and obtain for the transition from a hot, normal quark matter core of a protoneutron star to a cool diquark condensed one a release of binding energy of the order of Delta M c^2 ~ 10^{53} erg. We discuss the claim that this energy could serve as an engine for explosive phenomena.

Blaschke, David B; Grigorian, H

2004-01-01T23:59:59.000Z

378

The influence of quark energy loss on extracting nuclear sea quark distribution from nuclear Drell-Yan experimental data  

E-Print Network (OSTI)

By means of two typical kinds of quark energy loss parametrization and the nuclear parton distributions determined only with lepton-nuclear deep inelastic scattering experimental data, a leading order analysis are performed on the proton-induced Drell-Yan differential cross section ratios of tungsten versus deuterium as a function of the quark momentum fraction in the beam proton and target nuclei. It is found that the theoretical results with quark energy loss are in good agreement with the experimental data. The quark energy loss effect produce approximately 3% to 11% suppression on the Drell-Yan differential cross section ratios $R_{W/D}$ in the range $0.05\\leq x_2\\leq0.3$. The application of nuclear Drell-Yan data with heavy targets is remarkably subject to difficulty in the constraints of the nuclear sea-quark distribution.

Duan Chun-Gui; Liu Na

2008-09-28T23:59:59.000Z

379

Fluctuating Heavy Quark Energy Loss in Strongly-Coupled Quark-Gluon Plasma  

E-Print Network (OSTI)

Results from an energy loss model that includes thermal fluctuations in the energy loss for heavy quarks in a strongly-coupled plasma are shown to be qualitatively consistent with single particle data from both RHIC and LHC. The model used is the first to properly include the fluctuations in heavy quark energy loss as derived in string theory and that do not obey the usual fluctuation-dissipation relations. These fluctuations are crucial for simultaneously describing both RHIC and LHC data; leading order drag results without fluctuations are falsified by current data. Including the fluctuations is non-trivial and relies on the Wong-Zakai theorem to fix the numerical Langevin implementation. The fluctuations lead to surprising results: B meson anisotropy is similar to that for D mesons at LHC, and the double ratio of D to B meson nuclear modification factors approaches unity more rapidly than even predictions from perturbative energy loss models. It is clear that future work in improving heavy quark energy los...

Horowitz, W A

2015-01-01T23:59:59.000Z

380

Combined search for the quarks of a sequential fourth generation  

Results are presented from a search for a fourth generation of quarks produced singly or in pairs in a data set corresponding to an integrated luminosity of 5??fb?1 recorded by the CMS experiment at the LHC in 2011. A novel strategy has been developed for a combined search for quarks of the up and down type in decay channels with at least one isolated muon or electron. Limits on the mass of the fourth-generation quarks and the relevant Cabibbo-Kobayashi-Maskawa matrix elements are derived in the context of a simple extension of the standard model with a sequential fourth generation of fermions. The existence of mass-degenerate fourth-generation quarks with masses below 685 GeV is excluded at 95% confidence level for minimal off-diagonal mixing between the third- and the fourth-generation quarks. With a mass difference of 25 GeV between the quark masses, the obtained limit on the masses of the fourth-generation quarks shifts by about 20??GeV . These results significantly reduce the allowed parameter space for a fourth generation of fermions.

Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Aguilo, E.; Bergauer, T.; Dragicevic, M.; Er, J.; Fabjan, C.; Friedl, M.; Frhwirth, R.; Ghete, V. M.; Hammer, J.; Hrmann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Knnz, V.; Krammer, M.; Krtschmer, I.; Liko, D.; Mikulec, I.; Pernicka, M.; Rahbaran, B.; Rohringer, C.; Rohringer, H.; Schfbeck, R.; Strauss, J.; Taurok, A.; Waltenberger, W.; Walzel, G.; Widl, E.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Bansal, M.; Bansal, S.; Cornelis, T.; De Wolf, E. A.; Janssen, X.; Luyckx, S.; Mucibello, L.; Ochesanu, S.; Roland, B.; Rougny, R.; Selvaggi, M.; Staykova, Z.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Van Spilbeeck, A.; Blekman, F.; Blyweert, S.; DHondt, J.; Gonzalez Suarez, R.; Kalogeropoulos, A.; Maes, M.; Olbrechts, A.; Van Doninck, W.; Van Mulders, P.; Van Onsem, G. P.; Villella, I.; Clerbaux, B.; De Lentdecker, G.; Dero, V.; Gay, A. P. R.; Hreus, T.; Lonard, A.; Marage, P. E.; Mohammadi, A.; Reis, T.; Thomas, L.; Vander Marcken, G.; Vander Velde, C.; Vanlaer, P.; Wang, J.; Adler, V.; Beernaert, K.; Cimmino, A.; Costantini, S.; Garcia, G.; Grunewald, M.; Klein, B.; Lellouch, J.; Marinov, A.; Mccartin, J.; Ocampo Rios, A. A.; Ryckbosch, D.; Strobbe, N.; Thyssen, F.; Tytgat, M.; Verwilligen, P.; Walsh, S.; Yazgan, E.; Zaganidis, N.; Basegmez, S.; Bruno, G.; Castello, R.; Ceard, L.; Delaere, C.; du Pree, T.; Favart, D.; Forthomme, L.; Giammanco, A.; Hollar, J.; Lemaitre, V.; Liao, J.; Militaru, O.; Nuttens, C.; Pagano, D.; Pin, A.; Piotrzkowski, K.; Schul, N.; Vizan Garcia, J. M.; Beliy, N.; Caebergs, T.; Daubie, E.; Hammad, G. H.; Alves, G. A.; Correa Martins Junior, M.; De Jesus Damiao, D.; Martins, T.; Pol, M. E.; Souza, M. H. G.; Ald Jnior, W. L.; Carvalho, W.; Custdio, A.; Da Costa, E. M.; De Oliveira Martins, C.; Fonseca De Souza, S.; Matos Figueiredo, D.; Mundim, L.; Nogima, H.; Oguri, V.; Prado Da Silva, W. L.; Santoro, A.; Soares Jorge, L.; Sznajder, A.; Anjos, T. S.; Bernardes, C. A.; Dias, F. A.; Tomei, T.R. Fernandez Perez; Gregores, E. M.; Lagana, C.; Marinho, F.; Mercadante, P. G.; Novaes, S. F.; Padula, Sandra S.; Genchev, V.; Iaydjiev, P.; Piperov, S.; Rodozov, M.; Stoykova, S.; Sultanov, G.; Tcholakov, V.; Trayanov, R.; Vutova, M.; Dimitrov, A.; Hadjiiska, R.; Kozhuharov, V.; Litov, L.; Pavlov, B.; Petkov, P.; Bian, J. G.; Chen, G. M.; Chen, H. S.; Jiang, C. H.; Liang, D.; Liang, S.; Meng, X.; Tao, J.; Wang, J.; Wang, X.; Wang, Z.; Xiao, H.; Xu, M.; Zang, J.; Zhang, Z.; Asawatangtrakuldee, C.; Ban, Y.; Guo, S.; Guo, Y.; Li, W.; Liu, S.; Mao, Y.; Qian, S. J.; Teng, H.; Wang, D.; Zhang, L.; Zhu, B.; Zou, W.; Avila, C.; Gomez, J. P.; Gomez Moreno, B.; Osorio Oliveros, A. F.; Sanabria, J. C.; Godinovic, N.; Lelas, D.; Plestina, R.; Polic, D.; Puljak, I.; Antunovic, Z.; Kovac, M.; Brigljevic, V.; Duric, S.; Kadija, K.; Luetic, J.; Morovic, S.; Attikis, A.; Galanti, M.; Mavromanolakis, G.; Mousa, J.; Nicolaou, C.; Ptochos, F.; Razis, P. A.; Finger, M.; Finger, M.; Assran, Y.; Elgammal, S.; Ellithi Kamel, A.; Khalil, S.; Mahmoud, M. A.; Radi, A.; Kadastik, M.; Mntel, M.; Raidal, M.; Rebane, L.; Tiko, A.; Eerola, P.; Fedi, G.; Voutilainen, M.; Hrknen, J.; Heikkinen, A.; Karimki, V.; Kinnunen, R.; Kortelainen, M. J.; Lampn, T.; Lassila-Perini, K.; Lehti, S.; Lindn, T.; Luukka, P.; Menp, T.; Peltola, T.; Tuominen, E.; Tuominiemi, J.; Tuovinen, E.; Ungaro, D.; Wendland, L.; Banzuzi, K.; Karjalainen, A.; Korpela, A.; Tuuva, T.; Besancon, M.; Choudhury, S.; Dejardin, M.; Denegri, D.; Fabbro, B.; Faure, J. L.; Ferri, F.; Ganjour, S.; Givernaud, A.; Gras, P.; Hamel de Monchenault, G.; Jarry, P.; Locci, E.; Malcles, J.; Millischer, L.; Nayak, A.; Rander, J.; Rosowsky, A.; Shreyber, I.; Titov, M.; Baffioni, S.; Beaudette, F.; Benhabib, L.; Bianchini, L.; Bluj, M.; Broutin, C.; Busson, P.; Charlot, C.; Daci, N.; Dahms, T.; Dobrzynski, L.; Granier de Cassagnac, R.; Haguenauer, M.; Min, P.; Mironov, C.; Naranjo, I. N.; Nguyen, M.; Ochando, C.; Paganini, P.; Sabes, D.; Salerno, R.; Sirois, Y.; Veelken, C.; Zabi, A.; Agram, J.-L.; Andrea, J.; Bloch, D.; Bodin, D.; Brom, J.-M.; Cardaci, M.; Chabert, E. C.; Collard, C.; Conte, E.; Drouhin, F.; Ferro, C.; Fontaine, J.-C.; Gel, D.; Goerlach, U.; Juillot, P.; Le Bihan, A.-C.; Van Hove, P.; Fassi, F.; Mercier, D.; Beauceron, S.; Beaupere, N.; Bondu, O.; Boudoul, G.; Chasserat, J.; Chierici, R.; Contardo, D.; Depasse, P.; El Mamouni, H.; Fay, J.; Gascon, S.; Gouzevitch, M.; Ille, B.; Kurca, T.; Lethuillier, M.; Mirabito, L.; Perries, S.; Sordini, V.; Tschudi, Y.; Verdier, P.; Viret, S.; Tsamalaidze, Z.; Anagnostou, G.; Beranek, S.; Edelhoff, M.; Feld, L.; Heracleous, N.; Hindrichs, O.; Jussen, R.; Klein, K.

2012-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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381

Combined search for the quarks of a sequential fourth generation  

E-Print Network (OSTI)

Results are presented from a search for a fourth generation of quarks produced singly or in pairs in a data set corresponding to an integrated luminosity of 5 inverse femtobarns recorded by the CMS experiment at the LHC in 2011. A novel strategy has been developed for a combined search for quarks of the up- and down-type in decay channels with at least one isolated muon or electron. Limits on the mass of the fourth-generation quarks and the relevant CKM matrix elements are derived in the context of a simple extension of the standard model with a sequential fourth generation of fermions. The existence of mass-degenerate fourth-generation quarks with masses below 685 GeV is excluded at 95% confidence level for minimal off-diagonal mixing between the third- and the fourth-generation quarks. With a mass difference of 25 GeV between the quark masses, the obtained limit on the masses of the fourth-generation quarks shifts by about +/- 20 GeV. This result significantly reduces the allowed parameter space for a fourt...

Chatrchyan, Serguei; Sirunyan, Albert M; Tumasyan, Armen; Adam, Wolfgang; Aguilo, Ernest; Bergauer, Thomas; Dragicevic, Marko; Er, Janos; Fabjan, Christian; Friedl, Markus; Fruehwirth, Rudolf; Ghete, Vasile Mihai; Hammer, Josef; Hrmann, Natascha; Hrubec, Josef; Jeitler, Manfred; Kiesenhofer, Wolfgang; Knnz, Valentin; Krammer, Manfred; Krtschmer, Ilse; Liko, Dietrich; Mikulec, Ivan; Pernicka, Manfred; Rahbaran, Babak; Rohringer, Christine; Rohringer, Herbert; Schfbeck, Robert; Strauss, Josef; Taurok, Anton; Waltenberger, Wolfgang; Walzel, Gerhard; Widl, Edmund; Wulz, Claudia-Elisabeth; Mossolov, Vladimir; Shumeiko, Nikolai; Suarez Gonzalez, Juan; Bansal, Monika; Bansal, Sunil; Cornelis, Tom; De Wolf, Eddi A; Janssen, Xavier; Luyckx, Sten; Mucibello, Luca; Ochesanu, Silvia; Roland, Benoit; Rougny, Romain; Selvaggi, Michele; Staykova, Zlatka; Van Haevermaet, Hans; Van Mechelen, Pierre; Van Remortel, Nick; Van Spilbeeck, Alex; Blekman, Freya; Blyweert, Stijn; D'Hondt, Jorgen; Gonzalez Suarez, Rebeca; Kalogeropoulos, Alexis; Maes, Michael; Olbrechts, Annik; Van Doninck, Walter; Van Mulders, Petra; Van Onsem, Gerrit Patrick; Villella, Ilaria; Clerbaux, Barbara; De Lentdecker, Gilles; Dero, Vincent; Gay, Arnaud; Hreus, Tomas; Lonard, Alexandre; Marage, Pierre Edouard; Mohammadi, Abdollah; Reis, Thomas; Thomas, Laurent; Vander Marcken, Gil; Vander Velde, Catherine; Vanlaer, Pascal; Wang, Jian; Adler, Volker; Beernaert, Kelly; Cimmino, Anna; Costantini, Silvia; Garcia, Guillaume; Grunewald, Martin; Klein, Benjamin; Lellouch, Jrmie; Marinov, Andrey; Mccartin, Joseph; Ocampo Rios, Alberto Andres; Ryckbosch, Dirk; Strobbe, Nadja; Thyssen, Filip; Tytgat, Michael; Verwilligen, Piet; Walsh, Sinead; Yazgan, Efe; Zaganidis, Nicolas; Basegmez, Suzan; Bruno, Giacomo; Castello, Roberto; Ceard, Ludivine; Delaere, Christophe; Du Pree, Tristan; Favart, Denis; Forthomme, Laurent; Giammanco, Andrea; Hollar, Jonathan; Lemaitre, Vincent; Liao, Junhui; Militaru, Otilia; Nuttens, Claude; Pagano, Davide; Pin, Arnaud; Piotrzkowski, Krzysztof; Schul, Nicolas; Vizan Garcia, Jesus Manuel; Beliy, Nikita; Caebergs, Thierry; Daubie, Evelyne; Hammad, Gregory Habib; Alves, Gilvan; Correa Martins Junior, Marcos; De Jesus Damiao, Dilson; Martins, Thiago; Pol, Maria Elena; Henrique Gomes E Souza, Moacyr; Ald Jnior, Walter Luiz; Carvalho, Wagner; Custdio, Analu; Da Costa, Eliza Melo; De Oliveira Martins, Carley; Fonseca De Souza, Sandro; Matos Figueiredo, Diego; Mundim, Luiz; Nogima, Helio; Oguri, Vitor; Prado Da Silva, Wanda Lucia; Santoro, Alberto; Soares Jorge, Luana; Sznajder, Andre; Souza Dos Anjos, Tiago; Bernardes, Cesar Augusto; De Almeida Dias, Flavia; Tomei, Thiago; De Moraes Gregores, Eduardo; Lagana, Caio; Da Cunha Marinho, Franciole; Mercadante, Pedro G; Novaes, Sergio F; Padula, Sandra; Genchev, Vladimir; Iaydjiev, Plamen; Piperov, Stefan; Rodozov, Mircho; Stoykova, Stefka; Sultanov, Georgi; Tcholakov, Vanio; Trayanov, Rumen; Vutova, Mariana; Dimitrov, Anton; Hadjiiska, Roumyana; Kozhuharov, Venelin; Litov, Leander; Pavlov, Borislav; Petkov, Peicho; Bian, Jian-Guo; Chen, Guo-Ming; Chen, He-Sheng; Jiang, Chun-Hua; Liang, Dong; Liang, Song; Meng, Xiangwei; Tao, Junquan; Wang, Jian; Wang, Xianyou; Wang, Zheng; Xiao, Hong; Xu, Ming; Zang, Jingjing; Zhang, Zhen; Asawatangtrakuldee, Chayanit; Ban, Yong; Guo, Shuang; Guo, Yifei; Li, Wenbo; Liu, Shuai; Mao, Yajun; Qian, Si-Jin; Teng, Haiyun; Wang, Dayong; Zhang, Linlin; Zhu, Bo; Zou, Wei; Avila, Carlos; Gomez, Juan Pablo; Gomez Moreno, Bernardo; Osorio Oliveros, Andres Felipe; Sanabria, Juan Carlos; Godinovic, Nikola; Lelas, Damir; Plestina, Roko; Polic, Dunja; Puljak, Ivica; Antunovic, Zeljko; Kovac, Marko; Brigljevic, Vuko; Duric, Senka; Kadija, Kreso; Luetic, Jelena; Morovic, Srecko; Attikis, Alexandros; Galanti, Mario; Mavromanolakis, Georgios; Mousa, Jehad; Nicolaou, Charalambos; Ptochos, Fotios; Razis, Panos A; Finger, Miroslav; Finger Jr, Michael; Assran, Yasser; Elgammal, Sherif; Ellithi Kamel, Ali; Khalil, Shaaban; Mahmoud, Mohammed; Radi, Amr; Kadastik, Mario; Mntel, Mait; Raidal, Martti; Rebane, Liis; Tiko, Andres; Eerola, Paula; Fedi, Giacomo; Voutilainen, Mikko; Hrknen, Jaakko; Heikkinen, Mika Aatos; Karimki, Veikko; Kinnunen, Ritva; Kortelainen, Matti J; Lampn, Tapio; Lassila-Perini, Kati; Lehti, Sami; Lindn, Tomas; Luukka, Panja-Riina; Menp, Teppo; Peltola, Timo; Tuominen, Eija; Tuominiemi, Jorma; Tuovinen, Esa; Ungaro, Donatella; Wendland, Lauri; Banzuzi, Kukka; Karjalainen, Ahti; Korpela, Arja; Tuuva, Tuure; Besancon, Marc; Choudhury, Somnath

2012-01-01T23:59:59.000Z

382

Four-Quark Hadrons: an Updated Review  

E-Print Network (OSTI)

The past decade witnessed a remarkable proliferation of exotic charmonium-like resonances discovered at accelerators. In particular, the recently observed charged states are clearly not interpretable as q-qbar mesons. Notwithstanding the considerable advances on the experimental side, conflicting theoretical descriptions do not seem to provide a definitive picture about the nature of the so-called XYZ particles. We present here a comprehensive review about this intriguing topic, discussing both those experimental and theoretical aspects which we consider relevant to make further progress in the field. At this state of progress, XYZ phenomenology speaks in favour of the existence of compact four-quark particles (tetraquarks) and we believe that realizing this instructs us in the quest for a firm theoretical framework.

Angelo Esposito; Andrea L. Guerrieri; Fulvio Piccinini; Alessandro Pilloni; Antonio D. Polosa

2014-12-29T23:59:59.000Z

383

Four-Quark Hadrons: an Updated Review  

E-Print Network (OSTI)

The past decade witnessed a remarkable proliferation of exotic charmonium-like resonances discovered at accelerators. In particular, the recently observed charged states are clearly not interpretable as q-qbar mesons. Notwithstanding the considerable advances on the experimental side, conflicting theoretical descriptions do not seem to provide a definitive picture about the nature of the so-called XYZ particles. We present here a comprehensive review about this intriguing topic, discussing both those experimental and theoretical aspects which we consider relevant to make further progress in the field. At this state of progress, XYZ phenomenology speaks in favour of the existence of compact four-quark particles (tetraquarks) and we believe that realizing this instructs us in the quest for a firm theoretical framework.

Esposito, Angelo; Piccinini, Fulvio; Pilloni, Alessandro; Polosa, Antonio D

2014-01-01T23:59:59.000Z

384

Congeniality bounds on quark masses from nucleosynthesis  

Science Journals Connector (OSTI)

The work of Jaffe, Jenkins and Kimchi [Phys. Rev. D 79, 065014 (2009)] is revisited to see if indeed the region of congeniality found in their analysis survives further restrictions from nucleosynthesis. It is observed that much of their congenial region disappears when imposing conditions required to produce the correct and required abundances of the primordial elements as well as ensure that stars can continue to burn hydrogen nuclei to form helium as the first step in forming heavier elements in stellar nucleosynthesis. The remaining region is a very narrow slit reduced in width from around 29MeV found by Jaffe etal. to only about 2.2MeV in the difference of the nucleon/quark masses. Further bounds on ?mq/mq seem to reduce even this narrow slit to the physical point itself.

M. Hossain Ali; M. Jakir Hossain; Abdullah Shams Bin Tariq

2013-08-02T23:59:59.000Z

385

Joint resummation for heavy quark production.  

E-Print Network (OSTI)

ar X iv :h ep -p h/ 05 10 14 9v 1 1 2 O ct 2 00 5 February 2, 2008 4:14 WSPC/INSTRUCTION FILE jr International Journal of Modern Physics A c World Scientific Publishing Company JOINT RESUMMATION FOR HEAVY QUARK PRODUCTION ANDREA BANFI Cavendish... to corrections O(1/p2T ), the observable may at any order 12 be written in the following factorized form d?AB?Q+X dpT = ? a,b ? 1 0 d?ad?b ?a/A(?a, )?b/B(?b, ) d?ab?Q+X dpT (?a, ?b, ?s(), pT ) , (1) with d?ab?Q+X/dpT the partonic differential cross...

Banfi, Andrea; Laenen, Eric

386

Quark contact interactions at the LHC  

Science Journals Connector (OSTI)

Quark contact interactions are an important signal of new physics. We introduce a model in which the presence of a symmetry protects these new interactions from giving large corrections in flavor changing processes at low energies. This minimal model provides the basic set of operators which must be considered to contribute to the high-energy processes. To discuss their experimental signature in jet pairs produced in proton-proton collisions, we simplify the number of possible operators down to two. We show (for a representative integrated luminosity of 200??pb-1 at s=7??TeV) how the presence of two operators significantly modifies the bound on the characteristic energy scale of the contact interactions, which is obtained by keeping a single operator.

F. Bazzocchi; U. De Sanctis; M. Fabbrichesi; A. Tonero

2012-06-01T23:59:59.000Z

387

Deutsche Rotor und Turm Service GmbH Co KG DRTS | Open Energy Information  

Open Energy Info (EERE)

Rotor und Turm Service GmbH Co KG DRTS Rotor und Turm Service GmbH Co KG DRTS Jump to: navigation, search Name Deutsche Rotor und Turm Service GmbH & Co KG (DRTS) Place Bremen, Germany Zip 28239 Sector Wind energy Product Service company for wind turbine blades and towers. References Deutsche Rotor und Turm Service GmbH & Co KG (DRTS)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Deutsche Rotor und Turm Service GmbH & Co KG (DRTS) is a company located in Bremen, Germany . References ↑ "Deutsche Rotor und Turm Service GmbH & Co KG (DRTS)" Retrieved from "http://en.openei.org/w/index.php?title=Deutsche_Rotor_und_Turm_Service_GmbH_Co_KG_DRTS&oldid=344202" Categories:

388

The sigma term and the quark number operator in QCD  

E-Print Network (OSTI)

We discuss the relationship of the forward matrix element of the operator $\\bar\\psi\\psi$, related to the so-called sigma term, to the quark number. We show that in the naive quark model in the canonical formalism these quantities coincide in the limit of small average quark momenta. In the QCD parton model defined through light-front quantization this result is preserved at leading perturbative order but it receives radiative corrections. We analyze the theoretical and phenomenological consequences of this result, which provides a bridge between a current algebra quantity, the sigma term, and a deep-inelastic quantity, the parton number.

Mauro Anselmino; Stefano Forte

1993-05-03T23:59:59.000Z

389

Heavy-quark correlations in deep-inelastic electroproduction  

E-Print Network (OSTI)

We have completed the next-to-leading order perturbative QCD corrections to the virtual-photon exclusive differential cross sections for heavy quark production in deep-inelastic electron-proton scattering, i.e. $e + P \\rightarrow Q + \\overline{Q} + X$. Using these results, we have computed distributions which are sensitive to correlations among the heavy quark, the heavy antiquark, and the associated jet. Some predictions for charm and bottom heavy quark production at the electron-proton collider HERA are presented.

B. W. Harris; J. Smith

1995-03-31T23:59:59.000Z

390

Nucleosynthesis in neutron-rich ejecta from quark-novae  

E-Print Network (OSTI)

We explore heavy-element nucleosynthesis by rapid neutron capture (r-process) in the decompressing ejecta from the surface of a neutron star. The decompression is triggered by a violent phase transition to strange quark matter (quark-nova scenario). The presence of neutron-rich large Z nuclei (40,95) solar abundance pattern of r-process elements. We highlight the distinguishing features of quark-novae by contrasting it with conventional nucleosynthetic sites such as type II supernovae and neutron star mergers, especially in the context of heavy-element compositions of extremely metal-deficient stars.

Prashanth Jaikumar; Bradley S. Meyer; Kaori Otsuki; Rachid Ouyed

2006-10-04T23:59:59.000Z

391

The Particle Adventure | What is the world made of? | The naming of quarks  

NLE Websites -- All DOE Office Websites (Extended Search)

The naming of quarks The naming of quarks The naming of quarks The naming of quarks... ...began when, in 1964, Murray Gell-Mann and George Zweig suggested that hundreds of the particles known at the time could be explained as combinations of just three fundamental particles. Gell-Mann chose the name "quarks," pronounced "kworks," for these three particles, a nonsense word used by James Joyce in the novel Finnegan's Wake: "Three quarks for Muster Mark!" In order to make their calculations work, the quarks had to be assigned fractional electrical charges of 2/3 and -1/3. Such charges had never been observed before. Quarks are never observed by themselves, and so initially these quarks were regarded as mathematical fiction. Experiments have since convinced physicists that not only do quarks exist, but there are six of them, not three.

392

Quarkonium mass splittings with Fermilab heavy quarks and 2+1 flavors of improved staggered sea quarks  

E-Print Network (OSTI)

We present results from an ongoing lattice study of the lowest lying charmonium and bottomonium level splittings using the Fermilab heavy quark formalism. Our objective is to test the performance of this action on MILC-collaboration ensembles of (2+1) flavors of light improved staggered (asqtad) quarks. Measurements are done on 16 ensembles with degenerate up and down quarks of various masses, thus permitting a chiral extrapolation, and over lattice spacings ranging from 0.09 fm to 0.18 fm, thus permitting study of lattice-spacing dependence. We examine combinations of the mass splittings that are sensitive to components of the effective quarkonium potential.

T. Burch; C. E. DeTar; M. Di Pierro; A. X. El-Khadra; Steven Gottlieb; A. S. Kronfeld; L. Levkova; P. B. Mackenzie; J. Simone

2009-11-02T23:59:59.000Z

393

Reading Comprehension - Looking for Quarks Inside the Atom  

NLE Websites -- All DOE Office Websites (Extended Search)

Looking for Quarks Inside the Atom Looking for Quarks Inside the Atom In the late 1960's, three scientists ran some accelerator experiments to study the nucleus at the _________ outside edge center perimeter of the atom. They ran the experiments because they wanted to know more about the structure of the _________ nucleus accelerator electromagnet spectrometer . They found that the protons and neutrons in the nucleus are made of quarks. The discovery of _________ alpha quarks nuclei electron raised new questions about the nucleus. The three scientists are Richard Taylor, Henry Kendall and Jerome Friedman. They did their experiments from 1967 to 1973 in California at the Stanford Linear Accelerator Center, called SLAC for short. These scientists won the 1990 Nobel Prize in Physics, one of the world's greatest honors for

394

Fermilab | Newsroom | Press Releases | September 27, 2012: QuarkNet...  

NLE Websites -- All DOE Office Websites (Extended Search)

Notre Dame were two of the initial QuarkNet centers. Marge Bardeen, head of the Fermilab Education Office, started the Fermilab center 15 years ago. Her vision was to inspire and...

395

Phase Transition from QMC Hyperonic Matter to Deconfined Quark Matter  

SciTech Connect

We investigate the possibility and consequences of phase transitions from an equation of state (EoS) describing nucleons and hyperons interacting via mean-fields of sigma, omega, and rho mesons in the recently improved Quark-Meson Coupling (QMC) model to an EoS describing a Fermi gas of quarks in an MIT bag. The transition to a mixed phase of baryons and deconfined quarks, and subsequently to a pure deconfined quark phase is described using the method of Glendenning. The overall EoS for the three phases is calculated for various scenarios and these are used to calculate stellar solutions using the Tolman-Oppenheimer-Volkoff equations. The results are compared to recent experimental data and the validity of each case is discussed with consequences for determining the species content of the interior of neutron stars.

Carroll, Jonathan; Leinweber, Derek; Thomas, Anthony; Williams, Anthony

2008-01-01T23:59:59.000Z

396

Moving Quarks Help Solve Proton Spin Puzzle | Jefferson Lab  

NLE Websites -- All DOE Office Websites (Extended Search)

Moving Quarks Help Solve Proton Spin Puzzle NEWPORT NEWS, VA., Sept. 11, 2008 - New theory work at the U.S. Department of Energy's Thomas Jefferson National Accelerator Facility...

397

Measurement of Heavy Quark cross-sections at CDF  

E-Print Network (OSTI)

The measurement of heavy quark cross-sections provides important tests of the QCD theory. This paper reviews recent measurements of single b-quark and correlated b-quark cross-sections at CDF. Two new measurements of the single b-quark production at CDF agree with the first result from CDF Run II. This clarifies the experimental situation and confirms the recent agreement of theoretical prediction with data. A new measurement of the correlated $b\\bar{b}$ cross-section with dimuon events at CDF is presented. It agrees with theory and it does not confirm the anomalously large $b\\bar{b}$ cross-section seen in Run I by CDF and D${\

A. Annovi

2007-09-28T23:59:59.000Z

398

Statistical quark models for the nucleon structure functions  

SciTech Connect

We consider some existing relativistic models for the nucleon structure functions, relying on statistical approaches instead of perturbative ones. These models are based on the Fermi-Dirac distribution for the confined quarks, where a density of energy levels is obtained from an effective confining potential. In this context, it is presented some results obtained with a recent statistical quark model for the sea-quark asymmetry in the nucleon. It is shown, within this model, that experimental available observables, such as the ratio and difference between proton and neutron structure functions, are quite well reproduced with just three parameters: two chemical potentials used to reproduce the valence up and down quark numbers in the nucleon, and a temperature that is being used to reproduce the Gottfried sum rule violation.

Mirez, Carlos [Instituto de Fisica Teorica, Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271, Barra-Funda, 01140-070, Sao Paulo, SP (Brazil); Tomio, Lauro [Instituto de Fisica Teorica, Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271, Barra-Funda, 01140-070, Sao Paulo, SP (Brazil); Instituto de Fisica, Universidade Federal Fluminense, 24210-346, Niteroi, RJ (Brazil)

2010-11-12T23:59:59.000Z

399

Eight-quark interactions as a chiral thermometer  

E-Print Network (OSTI)

A NJL Lagrangian extended to six and eight quark interactions is applied to study temperature effects (SU(3) flavor limit, massless case), and (realistic massive case). The transition temperature can be considerably reduced as compared to the standard approach, in accordance with recent lattice calculations. The mesonic spectra built on the spontaneously broken vacuum induced by the 't Hooft interaction strength, as opposed to the commonly considered case driven by the four-quark coupling, undergoes a rapid crossover to the unbroken phase, with a slope and at a temperature which is regulated by the strength of the OZI violating eight-quark interactions. This strength can be adjusted in consonance with the four-quark coupling and leaves the spectra unchanged, except for the sigma meson mass, which decreases. A first order transition behavior is also a possible solution within the present approach.

J. Moreira; A. A. Osipov; B. Hiller; A. H. Blin; J. Providencia

2008-06-02T23:59:59.000Z

400

Exploration of nucleon structure in lattice QCD with chiral quarks  

E-Print Network (OSTI)

In this work, we calculate various nucleon structure observables using the fundamental theory of quarks and gluons, QCD, simulated on a lattice. In our simulations, we use the full QCD action including Nf = 2+ 1 dynamical ...

Syritsyn, Sergey Nikolaevich

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Observation of $t$-channel electroweak top quark production  

SciTech Connect

The top quark is the heaviest known fundamental particle, with a mass of 172.0{sub -1.3}{sup +0.9}GeV. This is nearly twice the mass of the second heaviest known particle, the Z boson, and roughly the mass of a gold atom. Because of its unusually large mass, studying the top quark may provide insight into the Higgs mechanism and other beyond the standard model physics. Only two accelerators in the world are powerful enough to produce top quarks. The Tevatron, which first accelerated protons in 1983, has produced almost 400,000 top quarks, roughly half at each of its two detectors: DO and CDF. The LHC is a much newer accelerator which currently has accumulated about 0.5% as much data as the Tevatron. However, when running at full luminosity, the LHC is capable of producing a top quark about once every second and will quickly surpass the Tevatron as the leading producer of top quarks. This analysis uses data from the D0 detector at the Tevatron, which are described in chapter 3. Top quarks are produced most often in pairs of top and anti-top quarks through an interaction of the strong force. This production mode was first observed in 1995 at the Tevatron. However, top quarks can also be produced though an electroweak interaction, which produces just one top quark. This production mode was first observed at the Tevatron in 2008. Single top quark production can occur in different channels. In this analysis, a measurement of the cross section of the t-channel production mode is performed. This measurement uses 5.4 fb{sup -1} of data and uses the technique of boosted decision trees in order to separate signal from background events. The t-channel cross section is measured to be: {sigma}(p{bar p} {yields} tqb + X) = 3.03{sub -0.66}{sup +0.78}pb (0.0.1). Additional cross section measurements were also performed for the s-channel as well as the s + t-channel. The measurement of each one of these three cross sections was repeated three times using different techniques, and all three methods were combined into a 'super-method' which achieves the best performance. The details of these additional measurements are shown in appendix A.

Triplett, Nathan; /Iowa State U.

2011-04-01T23:59:59.000Z

402

[Review of] Stefan Michael Newerkla. Sprachkontakte deutsch tschechisch slowakisch. Wrterbuch der deutschen Lehnwrter im Tschechischen und Slowakischen: historische Entwicklung, Beleglage, bisherige und neue Deutungen. Zweite, durchgehend berarbeitete und aktualisierte Auflage (= Schriften ber Sprachen und Texte 7)  

E-Print Network (OSTI)

112 Slavia Centralis 1/2013 Ocene, zapiski, poro?ila Reviews, Notes, Reports SteFan MiCHael neWerkla. SPracHKontaKte deutScH tScHecHiScH SLoWaKiScH. Wrterbuch der deutschen Lehnwrter im Tschechischen und Slowakischen: historische...

Greenberg, Marc L.

2013-01-01T23:59:59.000Z

403

FAKULTT FR PHYSIK UND ASTRONOMIE DEPARTMENT OF PHYSICS AND ASTRONOMY  

E-Print Network (OSTI)

FAKULT?T F?R PHYSIK UND ASTRONOMIE DEPARTMENT OF PHYSICS AND ASTRONOMY DEKANAT / OFFICE OF THE DEAN beizufügen: 1. Die Angaben des Faches, für das die Habilitation erfolgen soll (Physik oder Astronomie). 1x 2

Heermann, Dieter W.

404

Bachelor Chemie und Molekulare Wissenschaften Stundenplan 1. Semester Herbstsemester 2014  

E-Print Network (OSTI)

Bachelor Chemie und Molekulare Wissenschaften Stundenplan 1. Semester ­ Herbstsemester 2014 Die Mittwoch Donnerstag Freitag 08.15-09.00 Mathematik I Prof. S. Baader Chemie UG 113 4 ECTS Mathematik I Prof. S. Baader Chemie UG 113 Praktikum Allg. Chemie Dr. R. Weber 09.15-10.00 Allgemeine Chemie I Dr. M

Mühlemann, Oliver

405

Amorphe ferromagnetische werkstoffe - magnetische grundlagen, eigenschaften und anwendungen  

Science Journals Connector (OSTI)

Zusammenfassung Nach einem berblick ber die magnetischen Grundkonstanten und die erzielten Eigenschaftswerte ferromagnetischer amorpher Legierungen werden technische Anwendungsmglichkeiten behandelt. After a survey is given of the fundamental magnetic aspects and the properties attained with ferromagnetic amorphous alloys, different fields of applications are discussed.

H.-R Hilzinger; A Mager; H Warlimont

1978-01-01T23:59:59.000Z

406

Zur ultraschnellen Reaktionsdynamik von Wasserstoff und Grenzflachenstruktur von  

E-Print Network (OSTI)

Zur ultraschnellen Reaktionsdynamik von Wasserstoff und Grenzfl¨achenstruktur von Wasser auf der Ru¨achen . . . . . . . . . . . . . . . . . 30 3 Grundlagen der Adsorptionssysteme 33 3.1 Wasserstoff auf Ru(001 die Wasserstoff­Br¨uckenbindung . . . . . . . . 41 3.2.2 Kristallines Eis im Volumen

Wolf, Martin

407

Social-Media-Marketing, Web 2.0 und Co.  

Science Journals Connector (OSTI)

Was genau ist eigentlich Web 2.0, was ist Social-Media-Marketing ... der Begrnder des WWW, soll einmal vom Web 2.0 gesagt haben: Ich finde, dass Web 2.0 natrlich ein Jargonausdruck ist, niemand... Und tatschl...

Dr. Erwin Lammenett

2014-01-01T23:59:59.000Z

408

Heavy-quark probes of the quark-gluon plasma and interpretation of recent data taken at the BNL Relativistic Heavy Ion Collider  

E-Print Network (OSTI)

Thermalization and collective flow of charm (c) and bottom (b) quarks in ultrarelativistic heavy-ion collisions are evaluated based on elastic parton rescattering in an expanding quark-gluon plasma (QGP). We show that resonant interactions in a...

van Hees, H.; Greco, V.; Rapp, Ralf.

2006-01-01T23:59:59.000Z

409

Quark Phase Transition Parameters and $?$-Meson Field in RMF Theory  

E-Print Network (OSTI)

The deconfinement phase transition from hadronic matter to quark matter in the interior of compact stars is investigated. The hadronic phase is described in the framework of relativistic mean-field (RMF) theory, when also the scalar- isovector $\\delta$-meson effective field is taken into account. To describe a quark phase the MIT bag model is used. The changes of the mixed phase threshold parameters caused by the presence of $\\delta$-meson field are investigated.

G. B. Alaverdyan

2009-07-23T23:59:59.000Z

410

Shear viscosity and spectral function of the quark matter  

E-Print Network (OSTI)

We discuss the shear viscosity of the quark matter by using the Kubo-Mori formula. It is found that the shear viscosity is expressed in terms of the quark spectral function. If the spectral function is approximated by a modified Bright-Wigner type, the viscosity decreases as the width of the spectral function increases. We also discuss dependence of the shear viscosity on the temperature and the density.

Masaharu Iwasaki; Hiromasa Ohnishi; Takahiko Fukutome

2006-06-19T23:59:59.000Z

411

Testing ETC Generation of the Top Quark Mass  

E-Print Network (OSTI)

We consider constraints on models in which a top quark mass is generated through unenhanced extended technicolor interactions. The deviation in the $\\rho$ parameter from unity and $B$--$\\overline{B}$ mixing could be large, but given the uncertainties in strong dynamics and variations in the parameters of models, no conclusive statement can be given. We conclude that the low technicolor scale which is required to generate the top quark mass is not ruled out.

L. Randall

1992-10-13T23:59:59.000Z

412

Gluon Radiation and Energy Losses in Top Quark Production  

E-Print Network (OSTI)

The emission of energetic gluons in $\\tt$ production in $\\ee$ annihilation can have important experimental consequences, in particular on top quark mass measurements. We present compact, analytical expressions for the gluon energy distribution and its average value at first order in QCD perturbation theory. Our results are valid for arbitrary masses, collision energies and production currents. We pay particular attention to top quark production near threshold, and show that in certain cases the soft gluon approximation is insufficient to describe the radiation spectrum.

Yu. L. Dokshitzer; V. A. Khoze; W. J. Stirling

1994-05-06T23:59:59.000Z

413

Alle Angaben ohne Gewhr -fr eine verbindliche Festlegung wenden Sie sich bitte an den PA Zuordnungsliste Studienschwerpunkt Numerik und Simulation Studiengang Physikalische Ingenieurwissenschaft  

E-Print Network (OSTI)

Zuordnungsliste Studienschwerpunkt Numerik und Simulation Studiengang Physikalische Ingenieurwissenschaft Datum 27 bitte an den PA Zuordnungsliste Studienschwerpunkt Numerik und Simulation Studiengang Physikalische Studienschwerpunkt Numerik und Simulation Studiengang Physikalische Ingenieurwissenschaft Datum 27.08.07 Prüfungsfach

Berlin,Technische Universität

414

Revisting the boiling of quark nuggets at nonzero chemical potential  

E-Print Network (OSTI)

The boiling of possible quark nuggets during the quark-hadron phase transition of the Universe at nonzero chemical potential is revisited within the microscopic Brueckner-Hartree-Fock approach employed for the hadron phase, using two kinds of baryon interactions as fundamental inputs. To describe the deconfined phase of quark matter, we use a recently developed quark mass density-dependent model with a fully self-consistent thermodynamic treatment of confinement. We study the baryon number limit $A_{\\rm boil}$ (above which boiling may be important) with three typical values for the confinement parameter $D$. It is firstly found that the baryon interaction with a softer equation of state for the hadron phase would only lead to a small increase of $A_{\\rm boil}$. However, results depend sensitively on the confinement parameter in the quark model. Specifically, boiling might be important during the Universe cooling for a limited parameter range around $D^{1/2} = 170$ MeV, a value satisfying recent lattice QCD calculations of the vacuum chiral condensate, while for other choices of this parameter, boiling might not happen and cosmological quark nuggets of $10^2 < A < 10^{50}$ could survive.

Ang Li; Tong Liu; Philipp Gubler; Ren-Xin Xu

2013-12-13T23:59:59.000Z

415

Sea Quark Flavor Asymmetry of Hadrons in Statistical Balance Model  

E-Print Network (OSTI)

We derive a Menta Carlo method to simulate kinetic equilibrium ensemble, and get the same sea-quark flavor asymmetry as the linear equations method in statistical model. In the recent paper, we introduce the spilt factors to indicate the quarks' or gluons' spilt $g\\rightarrow q\\bar{q}(gg)$ and $q\\rightarrow qg$ ability. We obtain the almost fixed asymmetry value $0.12-0.16$ which consists with experimental measurements for proton, when the spilt factors vary in a very wide range over four orders of magnitude. So, we proof the sea quark asymmetry can be derived from statistic principle and not sensitively dependents on the dynamics details of quarks and gluons in proton. We also apply the Menta Carlo method of statistical model to predict the sea-quark asymmetry values for $K$ mesons, octet baryons $\\Sigma$,$\\Xi$ and $\\Delta$ baryons, even for exotic pentaquark states. All these asymmetry values just only dependent on the valence quarks numbers in those hadrons.

Bin Zhang; Yong-Jun Zhang

2010-08-03T23:59:59.000Z

416

Observation of the top quark with the DO detector  

SciTech Connect

The DO Collaboration reports on the observation of the top quark in p{bar p} collisions at {radical}s = 1.8 TeV at the Fermilab Tevatron. We measure the top quark mass to be 199{sub -21}{sup -19}(stat){sub -21}{sup +14}(syst.) GeV/c{sup 2} and its production cross section to be 6.4 {+-}2.2 pb. Our result is based on approximately 50 pb{sup -1} of data. We observe 17 events with an expected background of 3.8 {+-} 0.6 events. The probability of an upward fluctuation of the background to produce the observed signal is 2 x 10{sup -6} (equivalent to 4.6 standard deviations). The kinematic properties of the events are consistent with top quark decay, and the distribution of events across the seven decay channels is consistent with the Standard Model top quark branching fractions. We describe the analysis that led to the observation of the top quark as well as the properties of the top quark events.

Hadley, N.J. [Univ. of Maryland, College Park, MD (United States)

1997-01-01T23:59:59.000Z

417

Jet conversions in a quark-gluon plasma  

SciTech Connect

Quark and gluon jets traversing through a quark-gluon plasma not only lose their energies but also can undergo flavor conversions. The conversion rates via the elastic q(q)g{yields}gq(q) and the inelastic qq{r_reversible}gg scatterings are evaluated in the lowest order in QCD. Including both jet energy loss and conversions in the expanding quark-gluon plasma produced in relativistic heavy ion collisions, we have found a net of quark jets to gluon jets. This reduces the difference between the nuclear modification factors for quark and gluon jets in central heavy ion collisions and thus enhances the p/{pi}{sup +} and p/{pi}{sup -} ratios at high transverse momentum. However, a much larger net quark-to-gluon jet conversion rate than the one given by the lowest order QCD is needed to account for the observed similar ratios in central Au+Au and p+p collisions at the same energy. Implications of our results are discussed.

Liu, W.; Ko, C. M.; Zhang, B. W. [Cyclotron Institute and Physics Department, Texas A and M University, College Station, Texas 77843-3366 (United States)

2007-05-15T23:59:59.000Z

418

Jet conversions in a quark-gluon plasma  

E-Print Network (OSTI)

Quark and gluon jets traversing through a quark-gluon plasma not only lose their energies but also can undergo flavor conversions. The conversion rates via the elastic $q(\\bar q)g\\to gq(\\bar q)$ and the inelastic $q\\bar q\\leftrightarrow gg$ scatterings are evaluated in the lowest order in QCD. Including both jet energy loss and conversions in the expanding quark-gluon plasma produced in relativistic heavy ion collisions, we have found a net conversion of quark to gluon jets. This reduces the difference between the nuclear modification factors for quark and gluon jets in central heavy ion collisions and thus enhances the $p/\\pi^+$ and ${\\bar p}/\\pi^-$ ratios at high transverse momentum. However, a much larger net quark to gluon jet conversion rate than the one given by the lowest-order QCD is needed to account for the observed similar ratios in central Au+Au and p+p collisions at same energy. Implications of our results are discussed.

W. Liu; C. M. Ko; B. W. Zhang

2006-07-21T23:59:59.000Z

419

QuarkNet Workshop: Beyond Human Error  

NLE Websites -- All DOE Office Websites (Extended Search)

Human Error Human Error QuarkNet Workshop for High School Science Teachers 8:30 am to 4:00 pm, August 1 -3, 2012 at Fermi National Accelerator Laboratory This was a three-day workshop for high school science teachers. Measurement and error are key ingredients for all science applications. Both align with the Next Generation Science Standards, but many high school students struggle to understand the importance of error analysis and prevention. Over the three days we examined multiple experiments going on at Fermilab and discussed the ways that scientists take measurements and reduce error on these projects. Participants met and worked with scientists from Fermilab and University of Chicago to look at how error analysis takes place at Fermilab and bridged those ideas into high school classes. Teachers discussed lesson plans available at Fermilab and their own methods of teaching error analysis. Additionally, participants heard from high school students who participated in summer research as they presented their findings and linked students' learning back to the teachers' understanding of error recognition and analysis.

420

Search for New Particles Decaying to Dijets, Bottom Quarks, and Top Quarks at CDF  

E-Print Network (OSTI)

We present three searches for new particles at CDF. First, using 70 pb^-1 of data we search the dijet mass spectrum for resonances. There is an upward fluctuation near 550 GeV (2.6 sigma) with an angular distribution that is adequately described by either QCD alone or QCD plus 5% signal. There is insufficient evidence to claim a signal, but we set the most stringent mass limits on the hadronic decays of axigluons, excited quarks, technirhos, W', Z', and E6 diquarks. Second, using 19 pb^-1 of data we search the b-tagged dijet mass spectrum for b anti-b resonances. Again, an upward fluctuation near 600 GeV (2 sigma) is not significant enough to claim a signal, so we set the first mass limits on topcolor bosons. Finally, using 67 pb^-1 of data we search the top quark sample for t anti-t resonances like a topcolor Z'. Other than an insignificant shoulder of 6 events on a background of 2.4 in the mass region 475-550 GeV, there is no evidence for new particle production. Mass limits, currently in progress, should be sensitive to a topcolor Z' near 600 GeV. In all three searches there is insufficient evidence to claim new particle production, yet there is an exciting possibility that the upward fluctuations are the first signs of new physics beyond the standard model.

Robert M. Harris

1995-06-15T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

E-Print Network 3.0 - aktiven und reflexiven Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

30 GAIA 174(2008): 345346 | www.oekom.degaia m Prozess der Erarbeitung des IAASTD (deutsch: Weltagrar- Summary: reflexiven Dialog von Wissenschaft und Politik - am Beispiel des...

422

Anforderung an Elektrostraenfahrzeuge im Hinblick auf Marktakzeptanz und Einfgung in Verkehrskonzepte  

Science Journals Connector (OSTI)

Elektrostraenfahrzeuge knnen die dringend bentigte Entlastung der Innenstdte bewirken. Zustzlich zum ffentlichen Nahverkehr werden dafr E-Mobile fr den innerstdtischen Lieferverkehr und fr den indivi...

W. Kaufmann

1991-01-01T23:59:59.000Z

423

Die Interdependenz zwischen Russland und der Ukraine unter Bercksichtigung der Ressource Erdgas.  

E-Print Network (OSTI)

??Der Gasstreit zwischen Russland und der Ukraine 2005/06 hat europaweit eine Debatte ber die Energieabhngigkeit von russischem Erdgas ausgelst. Diese Ressource wurde zum geopolitischen Spielball (more)

Graisy, Katharina

2009-01-01T23:59:59.000Z

424

Privilegierte europische Nachbarschaft mit der Ukraine als Instrument der externalisierten EU-Grenz- und Migrationspolitik.  

E-Print Network (OSTI)

??Diese Arbeit untersucht die externalisierte EU-Grenz- und Migrationspolitik in der Ukraine. In diesem Rahmen wird in einem ersten Teil versucht einen berblick ber internationale Migration (more)

Diedrich, Sabrina

2014-01-01T23:59:59.000Z

425

Schutzhelme und Sicherheitswesten fr Arbeiten an Deck Hard tops and life vests for work deck  

E-Print Network (OSTI)

Impuls und Wärme. Während das Schiff sich langsam dem Eishindernis näherte, wurde jeweils in fünf Höhen

Meissner, Katrin Juliane

426

E-Print Network 3.0 - aml mds und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

< 1 2 3 4 5 > >> 1 Alexander Hinneburg Umbenennen der Dateien Summary: ALLAMLgrow.train.orig.txt 14260 1123880 3907158 total und der Spalten head -1 ALLAML......

427

E-Print Network 3.0 - aus arbeitsmedizinischer und Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Traineeprogramm bietet Ihnen Einsatz- und Entwicklungs... schreibt bereits seit 1919 Automobil- geschichte. Wir fertigen hier Fahrzeuge aus fnf ... Source: Seyfarth, Andre -...

428

E-Print Network 3.0 - anforderungen und allgemeine Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Technologies and Information Sciences 11 Feature Net ein Ansatz zur Modellierung von automobil-spezifischem Domnenwissen und Anforderungen Summary: Anforderungen J. Hartmann, A....

429

E-Print Network 3.0 - aus kleinanlagen und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Traineeprogramm bietet Ihnen Einsatz- und Entwicklungs... schreibt bereits seit 1919 Automobil- geschichte. Wir fertigen hier Fahrzeuge aus fnf ... Source: Seyfarth, Andre -...

430

E-Print Network 3.0 - aus leichtwasserreaktoren und Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Traineeprogramm bietet Ihnen Einsatz- und Entwicklungs... schreibt bereits seit 1919 Automobil- geschichte. Wir fertigen hier Fahrzeuge aus fnf ... Source: Seyfarth, Andre -...

431

E-Print Network 3.0 - aus bergbaulichen und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Traineeprogramm bietet Ihnen Einsatz- und Entwicklungs... schreibt bereits seit 1919 Automobil- geschichte. Wir fertigen hier Fahrzeuge aus fnf ... Source: Seyfarth, Andre -...

432

E-Print Network 3.0 - aus guelle und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Traineeprogramm bietet Ihnen Einsatz- und Entwicklungs... schreibt bereits seit 1919 Automobil- geschichte. Wir fertigen hier Fahrzeuge aus fnf ... Source: Seyfarth, Andre -...

433

E-Print Network 3.0 - aus carbonfasern und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Traineeprogramm bietet Ihnen Einsatz- und Entwicklungs... schreibt bereits seit 1919 Automobil- geschichte. Wir fertigen hier Fahrzeuge aus fnf ... Source: Seyfarth, Andre -...

434

Die Erkrankungen der Trachea, der Bronchien, der Lungen und der Pleuren  

Science Journals Connector (OSTI)

Die Lungen bilden zusammen mit den Bronchien drsenhnlich, aufgebaute Organe, in denen die Bronchien die zufhrenden Gnge, die Alveolen deren end- und seitenstndige Ausstlpungen darstellen.

R. Staehelin

1930-01-01T23:59:59.000Z

435

E-Print Network 3.0 - antarktischen zirkumpolarstroms und Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

und somit auch auf die ... Source: von Storch, Hans - Institute of Coastal Research, GKSS School of Environmental Research Collection: Environmental Sciences and Ecology ;...

436

Elektrische Charakterisierung und Modellierung von metallischen Interkonnektoren (MIC) des SOFC-Stacks.  

E-Print Network (OSTI)

??In dieser Arbeit wurde der Effekt des metallischen Interkonnektors (MIC) auf die Leistungsdichte der anodengesttzten Zelle (ASC) sowie die Wechselwirkung zwischen dem MIC und der (more)

Kornely, Michael

2012-01-01T23:59:59.000Z

437

Das Zeitalter des Merkantilismus. Die soziale und wirtschaftliche Entwicklung bis zum Siege des Liberalismus  

Science Journals Connector (OSTI)

Bei einer sozial- und wirtschaftsgeschichtlichen Betrachtung bedeutet der Dreiigjhrige Krieg einen deutlichen Einschnitt, der eine neue Periode einleitet, die bis zu den Auswirkungen der Aufklrungsphilosoph...

Dr. Dr. Friedrich Ltge

1960-01-01T23:59:59.000Z

438

E-Print Network 3.0 - anatomische und klinische Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Lehre und klinische Forschung des Instituts sind... zertifiziert nach ISO 9001:2008 Josef Lissner Laboratory for Biomedical Imaging Institut fr Klinische......

439

E-Print Network 3.0 - angst und depression Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

fr Ihre Artikelbestellung. Sie haben folgende Artikel Summary: -Forschungszentrum in Geesthacht. Der Mathematiker und Meteorologe zhlt zu den weltweit fhrenden Klimaexperten...

440

E-Print Network 3.0 - ablehnung und ihre Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Anpassung1 Hans von Storch Institut fr... Kstenforschung, Helmholtz Zentrum Geesthacht und Klimacampus Hamburg Zusammenfassung Die Welt ... Source: von Storch, Hans -...

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

E-Print Network 3.0 - auf labor- und Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

sind und die Reise auf den Mars sehr strapazis ist... zukunft forschung 010928 CHEMIE KOHLENSURE AUF DEM MARS? Tiroler Chemiker liefern Daten, mit denen... die Hypothese,...

442

Die Beeinflussung der Zusammenarbeit von deutschen und niederlndischen Studenten durch kulturelle Unterschiede.  

E-Print Network (OSTI)

??Diese Arbeit hat die Frage welche kulturelle Unterschiede das Zusammenarbeiten zwischen deutschen und niederlndischen Studenten beeinflussen, beantwortet. Anhand von Interviews mit deutschen Studenten, die in (more)

Rademakers, A.M.

2013-01-01T23:59:59.000Z

443

Prof. Dr. Dr. Ulrich G. Leinsle MERKBLATT FR DIE SCHRIFTLICHE UND MNDLICHE  

E-Print Network (OSTI)

, Darmstadt 2000. Paul Richard Blum (Hrsg.), Philosophen der Renaissance, Darmstadt 1999. Emerich Coreth, besonders bei Abaelard 9. Die Rezeption des aristotelischen Denkens bei Albertus Magnus, Bonaventura und

Schubart, Christoph

444

Diquark condensation effects on hot quark star configurations  

E-Print Network (OSTI)

The equation of state for quark matter is derived for a nonlocal, chiral quark model within the mean field approximation.We investigate the effects of a variation of the formfactors of the interaction on the phase diagram of quark matter. Special emphasis is on the occurrence of a diquark condensate which signals a phase transition to color superconductivity and its effects on the equation of state under the condition of beta- equilibrium and charge neutrality. We calculate the quark star configurations by solving the Tolman- Oppenheimer- Volkoff equations and obtain for the transition from a hot, normal quark matter core of a protoneutron star to a cool diquark condensed one a release of binding energy of the order of Delta M c^2 ~ 10^{53} erg. We find that this energy could not serve as an engine for explosive phenomena since the phase transition is not first order. Contrary to naive expectations the mass defect increases when for a given temperature we neglect the possibility of diquark condensation.

D. Blaschke; S. Fredriksson; H. Grigorian; A. M. "Oztas

2004-02-07T23:59:59.000Z

445

Top quark mass measurement using the template method at CDF  

We present a measurement of the top quark mass in the lepton+jets and dilepton channels of tt? decays using the template method. The data sample corresponds to an integrated luminosity of 5.6 fb-1 of pp? collisions at Tevatron with ?s = 1.96 TeV, collected with the CDF II detector. The measurement is performed by constructing templates of three kinematic variables in the lepton+jets and two kinematic variables in the dilepton channel. The variables are two reconstructed top quark masses from different jets-to-quarks combinations and the invariant mass of two jets from the W decay in the lepton+jets channel, and a reconstructed top quark mass and mT2, a variable related to the transverse mass in events with two missing particles, in the dilepton channel. The simultaneous fit of the templates from signal and background events in the lepton+jets and dilepton channels to the data yields a measured top quark mass of Mtop = 172.11.1 (stat)0.9 (syst) GeV/c2.

Aaltonen, T [Helsinki Inst. of Phys.; Alvarez Gonzalez, B [Oviedo U.; Cantabria Inst. of Phys.; Amerio, S [INFN, Padua; Amidei, D [Michigan U.; Anastassov, A [Northwestern U.; Annovi, A [Frascati; Antos, J [Comenius U.; Apollinari, G [Fermilab; Appel, J A [Fermilab; Apresyan, A [Purdue U.; Arisawa, T [Waseda U.; Dubna, JINR

2011-06-03T23:59:59.000Z

446

Top Quark Properties from Top Pair Events and Decays  

SciTech Connect

Over a decade since the discovery of the top quark we are still trying to unravel mysteries of the heaviest observed particle and learn more about its nature. The continuously accumulating statistics of CDF and DO data provide the means for measuring top quark properties with ever greater precision and the opportunity to search for signs of new physics that could be manifested through subtle deviations from the standard model in the production and decays of top quarks. In the following we present a slice of the rich program in top quark physics at the Fermilab Tevatron: measurements of the properties of top quark decays and searches for unusual phenomena in events with pair produced tops. In particular, we discuss the most recent and precise CDF and DO measurements of the transverse polarization of W bosons from top decays, branching ratios and searches for flavor-changing neutral current decays, decays into charged Higgs and invisible decays. These analyses correspond to integrated luminosities ranging from 0.9 to 2.7 fb{sup -1}.

Ivanov, A.; /UC, Davis

2008-11-01T23:59:59.000Z

447

Adsorption und anodische oxydation von wasserstoff an wolframcarbid  

Science Journals Connector (OSTI)

Zusammenfassung Es wird die anodische Oxydation von Wasserstoff an glatten Wolframcarbidelektroden beschrieben. Weiter wird die Austauschstromdichte bestimmt und das Adsorptionsverhalten des Wasserstoffs an Wolframcarbid ermittelt. Im Vergleich zu Wasserstoff an Platin erfolgt die Adsorption an Wolframcarbid langsamer und die Austauschstromdichte ist geringer. Aus den kinetischen Messungen ergibt sich die Reaktion \\{H2ad\\} ? 2Had als geschwindigkeitsbestimmender Schritt bei der Adsorption des Wasserstoffs an Wolframcarbid. The anodic oxidation of hydrogen at smooth tungsten carbine electrodes is described. The exchange cd and the adsorption behaviour of hydrogen at tungsten carbide is determined. As compared to hydrogen at platinum the adsorption at tungsten carbide is slower and the exchange cd is smaller. From kinetic measurements it follows that the reaction \\{H2ad\\} ? 2Had is the rate-determining step for the adsorption of hydrogen at tungsten carbide.

H. Bhm

1970-01-01T23:59:59.000Z

448

Traditionelles Bauen und Wohnen der Salar in Nordwest-China  

E-Print Network (OSTI)

Altertumswissenschaften knnen die Archologischen Mitteilungen aus Iran und Turan zum Vorzugspreis von 53,20 zuzglich Versandkosten abonnieren. Bestellungen sind an die Schriftleitung zu richten. Studenten werden um Vorlage einer Studienbescheinigung gebeten. Die... 2005. Goodman weist auf die Rolle hin, welche die erst am Beginn des 20. Jahrhunderts verbreitete Geschichte von der Kamelquelle in der Identittsfindung der Salar gespielt hat. Zhongguo wenwu dituji, Qinghai fence 1996, 116. Traditionelles Bauen...

Wagner, Mayke; Flitsch, Mareile; Winterstein, Claudia; Lehmann, Heike; Heuß ner, Karl-Uwe; Ren, Xiaoyan; Xiao, Yongming; Cai, Linhai; Wulf-Rheidt, Ulrike; Tarasov, Pavel; Dwyer, Arienne M.

2007-01-01T23:59:59.000Z

449

Lineare Algebra und Geometrie fur LehramtskandidatInnen  

E-Print Network (OSTI)

: Andreas.Cap@esi.ac.at #12;#12;Inhaltsverzeichnis Vorwort v Kapitel 6. Determinanten 1 Existenz der Notation von oben als [id]B ~B bzw [id] ~B B = ([id]B ~B )-1 schreiben kann. Analog gibt es zu einer weiteren Basis ~C f¨ur W die entsprechenden Basiswechselmatrizen, und es gilt [f] ~B ~C = [id]C ~C [f]B C

Drmota, Michael

450

10. Vorbeugender Brand-und Gefahrenschutz / Fire prevention  

E-Print Network (OSTI)

in den Gebäuden / Passiv Fire Protection 10.1.2.1. Löscheinrichtungen in den Gebäuden / Extinguishing / Structural fire protection10.2.1.1. ?berprüfung von Bauanträgen 10.2.1.2. ?berprüfung von Umwidmungen 10.2.2. Anlagentechnischer Brand- und Gefahrenschutz von Flächen / Passiv Fire Protection 10.2.2.1. Löscheinrichtungen auf

Berlin,Technische Universität

451

Makrosoziologische Analyse der objektiven Faktoren unternehmerischen Handelns. Neue Politische konomie als Theorie der institutionellen Voraussetzungen unternehmerischen Handelns und gesellschaftlicher Entwicklung  

Science Journals Connector (OSTI)

Die Ziele dieses Kapitel sind: Analyse der objektiven Faktoren unternehmerischen Handelns und ihrer Auswirkungen auf die gesellschaftliche Entwicklung. Analyseinstrumentarien sin...

Georg W. Oesterdiekhoff

1993-01-01T23:59:59.000Z

452

L. JANICKI.2014 Feinere Zerlegung der Spektrallinien von Quecksilber, Kadmium, Natrium, Zink, Thallium und Wasserstoff (Dcomposition des raies spectrales  

E-Print Network (OSTI)

, Thallium und Wasserstoff (Décomposition des raies spectrales du mercure, du cadmium, du sodium, du zinc, du

Boyer, Edmond

453

Nucleation of quark matter in the PQM model  

SciTech Connect

We use Langer's theory to calculate the surface tension of critical bubbles in a first-order quark-hadron phase transition at moderate and high baryon chemical potential, as predicted by the Polyakov-Quark-Meson (PQM) model at the mean-field level. We define an effective 4-dimensional order parameter, which is used to overestimate the surface tension of nucleating bubbles within the thin-wall approximation. We find relatively low values for the surface tension, {Sigma} Less-Than-Or-Equivalent-To 15MeV/fm{sup 2}. This implies that a metastable state, such as a supercooled quark-gluon plasma (QGP), quickly decays even in regions relatively close to the coexistence line of the phase diagram. Possible consequences for cosmology are briefly outlined.

Mintz, Bruno W. [Instituto de Fisica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, RJ 21945-970 (Brazil); Stiele, Rainer; Schaffner-Bielich, Juergen [Institut fuer Theoretische Physik, Ruprecht-Karls-Universitaet, Philosophenweg 16, D-69120, Heidelberg, Germany and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 D (Germany); Ramos, Rudnei O. [Departamento de Fisica Teorica, Universidade do Estado do Rio de Janeiro, 20550-013 Rio de Janeiro, RJ (Brazil)

2013-03-25T23:59:59.000Z

454

Octet Baryon Electromagnetic Form Factors in a Relativistic Quark Model  

SciTech Connect

We study the octet baryon electromagnetic properties by applying the covariant spectator quark model, and provide covariant parametrization that can be used to study baryon electromagnetic reactions. While we use the lattice QCD data in the large pion mass regime (small pion cloud effects) to determine the parameters of the model in the valence quark sector, we use the nucleon physical and octet baryon magnetic moment data to parameterize the pion cloud contributions. The valence quark contributions for the octet baryon electromagnetic form factors are estimated by extrapolating the lattice parametrization in the large pion mass regime to the physical regime. As for the pion cloud contributions, we parameterize them in a covariant, phenomenological manner, combined with SU(3) symmetry. We also discuss the impact of the pion cloud effects on the octet baryon electromagnetic form factors and their radii.

Gilberto Ramalho, Kazuo Tsushima

2011-09-01T23:59:59.000Z

455

NJL-jet model for quark fragmentation functions  

SciTech Connect

A description of fragmentation functions which satisfy the momentum and isospin sum rules is presented in an effective quark theory. Concentrating on the pion fragmentation function, we first explain why the elementary (lowest order) fragmentation process q{yields}q{pi} is completely inadequate to describe the empirical data, although the crossed process {pi}{yields}qq describes the quark distribution functions in the pion reasonably well. Taking into account cascadelike processes in a generalized jet-model approach, we then show that the momentum and isospin sum rules can be satisfied naturally, without the introduction of ad hoc parameters. We present results for the Nambu-Jona-Lasinio (NJL) model in the invariant mass regularization scheme and compare them with the empirical parametrizations. We argue that the NJL-jet model, developed herein, provides a useful framework with which to calculate the fragmentation functions in an effective chiral quark theory.

Ito, T.; Bentz, W. [Department of Physics, School of Science, Tokai University, Hiratsuka-shi, Kanagawa 259-1292 (Japan); Cloeet, I. C. [Department of Physics, University of Washington, Seattle, Washington 98195-1560 (United States); Thomas, A. W. [Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States) and College of William and Mary, Williamsburg, Virginia 23187 (United States); Yazaki, K. [Radiation Laboratory, Nishina Accelerator Research Center, RIKEN, Wako, Saitama 351-0198 (Japan)

2009-10-01T23:59:59.000Z

456

Hybrid stars within a covariant, nonlocal chiral quark model  

SciTech Connect

We present a hybrid equation of state (EoS) for dense matter in which a nuclear matter phase is described within the Dirac-Brueckner-Hartree-Fock (DBHF) approach and a two-flavor quark matter phase is modelled according to a recently developed covariant, nonlocal chiral quark model. We show that modern observational constraints for compact star masses (M{approx}2M{sub {center_dot}}) can be satisfied when a small vector-like four quark interaction is taken into account. The corresponding isospin symmetric EoS is consistent with flow data analyses of heavy ion collisions and points to a deconfinement transition at about 0.55 fm{sup -3}.

Blaschke, D. B. [Institute for Theoretical Physics, University of Wroclaw, Max Born place 9, PL-50204 Wroclaw (Poland); Bogoliubov Laboratory of Theoretical Physics, JINR Dubna, Joliot-Curie Street 6, RU-141980 Dubna (Russian Federation); Institut fuer Physik, Universitaet Rostock, Universitaetsplatz 3, D-18051 Rostock (Germany); Dumm, D. Gomez [Instituto de Fisica La Plata, CONICET-Departamento de Fisica, Universidad Nacional de La Plata, C.C. 67, 1900 La Plata (Argentina); CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); Grunfeld, A. G. [CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); Physics Department, Comision Nacional de Energia Atomica, Av. Libertador 8250, 1429 Buenos Aires (Argentina); Klaehn, T. [Institut fuer Physik, Universitaet Rostock, Universitaetsplatz 3, D-18051 Rostock (Germany); Gesellschaft fuer Schwerionenforschung mbH (GSI), D-64291 Darmstadt (Germany); Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843 (United States); Scoccola, N. N. [CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); Physics Department, Comision Nacional de Energia Atomica, Av. Libertador 8250, 1429 Buenos Aires (Argentina); Universidad Favaloro, Solis 453, 1078 Buenos Aires (Argentina)

2007-06-15T23:59:59.000Z

457

Dilepton emission at temperature dependent baryonic quark-gluon plasma  

E-Print Network (OSTI)

A fireball of QGP is evoluted at temperature dependent chemical potential by a statistical model in the pionic medium. We study the dilepton emission rate at temperature dependent chemical potential (TDCP) from such a fireball of QGP. In this model, we take the dynamical quark mass as a finite value dependence on temparature and parametrization factor of the QGP evolution. The temperature and factor in quark mass enhance in the growth of the droplets as well as in the dilepton emission rates. The emission rate from the plasma shows dilepton spectrum in the intermediate mass region (IMR) of (1.0-4.0) GeV and its rate is observed to be a strong increasing function of the temperature dependent chemical potential for quark and antiquark annihilation.

S. Somorendro Singh; Yogesh Kumar

2012-08-04T23:59:59.000Z

458

Quark Stars as inner engines for Gamma Ray Bursts?  

E-Print Network (OSTI)

A model for Gamma ray bursts inner engine based on quark stars (speculated to exist in nature) is presented. We describe how and why these objects might constitute new candidates for GRB inner engines. At the heart of the model is the onset of exotic phases of quark matter at the surface of such stars, in particular the 2-flavor color superconductivity. A novel feature of such a phase is the generation of particles which are unstable to photon decay providing a natural mechanism for a fireball generation; an approach which is fundamentally different from models where the fireball is generated during collapse or conversion of neutron star to quark star processes. The model is capable of reproducing crucial features of Gamma ray bursts, such as the episodic activity of the engine (multiple and random shell emission) and the two distinct categories of the bursts (two regimes are isolated in the model with \\sim 2 s and \\sim 81 s burst total duration).

R. Ouyed; F. Sannino

2001-03-01T23:59:59.000Z

459

Reconstruction of stop quark mass at the LHC  

Science Journals Connector (OSTI)

The cascade mass reconstruction approach was applied to simulated production of the lightest stop quark at the LHC in the cascade decay g?t1t??20tt??R?tt??10??tt with top quarks decaying into hadrons. The stop quark mass was reconstructed assuming that the masses of gluino, slepton, and the two lightest neutralinos were reconstructed in advance. A data sample set for the SU3 model point containing 400k supersymmetry events was generated which corresponded to an integrated luminosity of about 20??fb-1 at 14TeV. These events were passed through the AcerDET detector simulator, which parametrized the response of a generic LHC detector. The mass of the t1 was reconstructed with a precision of about 10%.

Diego Casadei; Rostislav Konoplich; Rashid Djilkibaev

2010-10-15T23:59:59.000Z

460

Relating quarks and leptons with the T7 flavour group  

E-Print Network (OSTI)

In this letter we present a model for quarks and leptons based on T7 as flavour symmetry, predicting a canonical mass relation between charged leptons and down-type quarks proposed earlier. Neutrino masses are generated through a Type-I seesaw mechanism, with predicted correlations between the atmospheric mixing angle and neutrino masses. Compatibility with oscillation results lead to lower bounds for the lightest neutrino mass as well as for the neutrinoless double beta decay rates, even for normal neutrino mass hierarchy.

Cesar Bonilla; Stefano Morisi; Eduardo Peinado; Jose W. F. Valle

2014-11-18T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

CP violation in the six-quark model  

Science Journals Connector (OSTI)

We construct a Weinberg-Salam-type gauge theory of a weak interaction with CP violation based on the six-quark model. Under the assumption of the validity of the Zweig-Iizuka rule and (quark mass W-meson mass )2?1 this leads to the superweak theory of CP violation for both uncharmed and charmed hadrons. We also propose a new assignment for the J and other ? particles, which predicts the existence of a 3.5-GeV 0- meson using the 2.85-GeV 0- state as input.

Sandip Pakvasa and Hirotaka Sugawara

1976-07-01T23:59:59.000Z

462

Compatibility of various approaches to heavy-quark fragmentation  

E-Print Network (OSTI)

We find that the definition of the heavy-quark fragmentation function given by Jaffe and Randall differs by a factor of the longitudinal-momentum fraction z from the standard Collins-Soper definition. Once this factor is taken into account, the explicit calculation of Braaten et al. is found to be in agreement with the general analysis of Jaffe and Randall. We also examine the model of Peterson et al. for heavy-quark fragmentation and find that the quoted values of the width and of the value of $z$ at the maximum are in error. The corrected values are in agreement with the analysis of Jaffe and Randall.

G. T. Bodwin; B. W. Harris

2000-12-05T23:59:59.000Z

463

Chiral and Heavy Quark Symmetry Violation in B Decays  

E-Print Network (OSTI)

The most general Lagrangian consistent with chiral, heavy quark, and strong interaction symmetries to order $1/M$ and to linear order in the SU(3) vector and axial currents is presented. Two new dimensionful and five dimensionless couplings arise at this order. The heavy to light flavor changing current is derived to the same order, giving rise to two additional dimensionful constants and six dimensionless ones. The dimensionless parameters are shown to be irrelevant at \\ord. The leading nonanalytic heavy quark and chiral symmetry violating corrections to heavy meson decay constants are computed, and implications to B decays are discussed; measurements of the experimentally accessible form factors for $D \\to \\pi l \

C. G. Boyd; B. Grinstein

1994-02-22T23:59:59.000Z

464

Relating quarks and leptons with the T7 flavour group  

E-Print Network (OSTI)

In this letter we present a model for quarks and leptons based on T7 as flavour symmetry, predicting a canonical mass relation between charged leptons and down-type quarks proposed earlier. Neutrino masses are generated through a Type-I seesaw mechanism, with predicted correlations between the atmospheric mixing angle and neutrino masses. Compatibility with oscillation results lead to lower bounds for the lightest neutrino mass as well as for the neutrinoless double beta decay rates, even for normal neutrino mass hierarchy.

Bonilla, Cesar; Peinado, Eduardo; Valle, Jose W F

2014-01-01T23:59:59.000Z

465

Quarks and the Strong Force Summary/Review Spring 2009 Compton Lecture Series  

E-Print Network (OSTI)

groups: one with non-zero quark number and the other with zero quark number ­ The non-zero quark number particles are all either spin 1/2 or spin 3/2. The zero quark number particles are all either spin 0 or spin exchange is a residual effect from the color structure of baryons which have no net color ­ Protons

466

Charm quark and D^* cross sections in deeply inelastic scattering at DESY HERA  

E-Print Network (OSTI)

A next-to-leading order Monte Carlo program for the calculation of heavy quark cross sections in deeply inelastic scattering is described. Concentrating on charm quark and D^*(2010) production at HERA, several distributions are presented and their variation with respect to charm quark mass, parton distribution set, and renormalization-factorization scale is studied.

B. W. Harris; J. Smith

1997-06-11T23:59:59.000Z

467

Meson properties in a nonlocal SU(3) chiral quark model at finite temperature  

SciTech Connect

Finite temperature meson properties are studied in the context of a nonlocal SU(3) quark model which includes flavor mixing and the coupling of quarks to the Polyakov loop (PL). We analyze the behavior of scalar and pseudoscalar meson masses and mixing angles, as well as quark-meson couplings and pseudoscalar meson decay constants.

Contrera, G. A. [CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); Physics Department, Centro Atomico Constituyentes, Buenos Aires (Argentina); Gomez Dumm, D. [CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); IFLP, Dpto. de Fisica, Universidad Nacional de La Plata, C.C. 67, (1900) La Plata (Argentina); Scoccola, N. N. [CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); Universidad Favaloro, Solis 453, 1078 Buenos Aires (Argentina)

2010-11-12T23:59:59.000Z

468

Prfungs-und Studienordnung fr den Teilstudiengang Deutsch im Lehramtsstudiengang Gymnasium  

E-Print Network (OSTI)

1 Prüfungs- und Studienordnung für den Teilstudiengang Deutsch im Lehramtsstudiengang Gymnasium Teilstudiengang Deutsch im Lehramtsstudiengang an Gymnasien die folgende Prüfungs- und Studienordnung als Satzung Deutsch im Lehramtsstudiengang an Gymnasien. Dieser Studiengang stellt einen Studiengang im Sinne von § 2

Greifswald, Ernst-Moritz-Arndt-Universität

469

Prfungs-und Studienordnung fr den Teilstudiengang Deutsch im Lehramtsstudiengang Regionale Schule  

E-Print Network (OSTI)

1 Prüfungs- und Studienordnung für den Teilstudiengang Deutsch im Lehramtsstudiengang Regionale), erlässt die Ernst-Moritz-Arndt-Universität Greifswald für den Teilstudiengang Deutsch im Studienordnung regelt das Studium und das Prüfungsverfahren im Teilstudiengang Deutsch im Lehramtsstudiengang

Greifswald, Ernst-Moritz-Arndt-Universität

470

Prfungs-und Studienordnung fr den Teilstudiengang Deutsch im Lehramtsstudiengang Gymnasium  

E-Print Network (OSTI)

Prüfungs- und Studienordnung für den Teilstudiengang Deutsch im Lehramtsstudiengang Gymnasium Teilstudiengang Deutsch im Lehramtsstudiengang an Gymnasien die folgende Prüfungs- und Studienordnung als Satzung Deutsch im Lehramtsstudiengang an Gymnasien. Dieser Studiengang stellt einen Studiengang im Sinne von § 2

Greifswald, Ernst-Moritz-Arndt-Universität

471

Zeitschrift fur Physikalische Chemie, 208 (1957), pp. 3341. UBER KINETIK UND GLEICHGEWICHT DER  

E-Print Network (OSTI)

Zeitschrift f¨ur Physikalische Chemie, 208 (1957), pp. 33­41. ¨UBER KINETIK UND GLEICHGEWICHT DER¨or¨ok Institut f¨ur allgemeine und anorganische Chemie der E¨otv¨os Lor´and Univ. Budapest (Mit 3 Tabellen im

472

M.Sc.Info-Veranstaltung, 21. Juni 2011 M.Sc. Chemie und Molecular Science  

E-Print Network (OSTI)

M.Sc.Info-Veranstaltung, 21. Juni 2011 M.Sc. Chemie und Molecular Science an der FAU Erlangen-Nürnberg Rainer Fink - Studiendekan Chemie / Mol.Sci. - #12;M.Sc.Info-Veranstaltung, 21. Juni 2011 Grundzüge der Masterstudiengänge Chemie und Molecular Science Qualifikation zu den Masterstudiengängen Modulwahl (Chemie

Stummer, Wolfgang

473

Naturwissenschaftlich-Technische Fakultt III Chemie, Pharmazie, Bio-und Werkstoffwissenschaften  

E-Print Network (OSTI)

Naturwissenschaftlich-Technische Fakultät III Chemie, Pharmazie, Bio- und Werkstoffwissenschaften Spannende Chemie-Vorträge für saarländische Schulen Die Saarbrücker Chemie-Professoren möchten den Chemieunterricht an saarländischen Schulen durch Schulbesuche und Vorträge zu allgemeinen Themen der Chemie

Mayberry, Marty

474

Junge WisseJunge Wissenschaft und Praxis > Freitag, 24. Juni 2011  

E-Print Network (OSTI)

Kaffeepause 11:00 Uhr Prof. Dr. Thomas Hirth, Direktor des Fraunhofer- Instituts für Grenzflächen- und Bioverfahrens- technik, Stuttgart Bioökonomie ­ Innovation, Rohstoff- wandel und Klimaschutz 12:15 ­ 13:30 Uhr

Schüler, Axel

475

Sedimentproduktion im Oberflchenabfluss und im Gerinne eines tropischen Waldes in Zentral-Panama  

E-Print Network (OSTI)

Sedimentproduktion im Oberflächenabfluss und im Gerinne eines tropischen Waldes in Zentral-Panama. Fragestellung und Zielsetzung Auf Barro Colorado Island in Panama gibt es Gebiete in denen es während Island (BCI) Mittelamerika, tropisches Klima Liegt im Gatun See im Panama Kanal Fläche: 3,3ha Ganz BCI

Baer, Christian

476

Lagrange-und Hamilton-Formalismus Hamilton-Formalismus mit Nebenbedingungen  

E-Print Network (OSTI)

Lagrange- und Hamilton-Formalismus Hamilton-Formalismus mit Nebenbedingungen Anwendung des Literatur Hamilton-Systeme mit Nebenbedingungen Jan Michael Kimmich Institut f¨ur Physik Humboldt-Universit¨at zu Berlin 03.02.2010 1 / 29 #12;Lagrange- und Hamilton-Formalismus Hamilton-Formalismus mit

477

87connaissancesSchweiz Z Forstwes 160 (2009) 4: 8792 Jahrringe, Lawinen und eine zerstrte alphtte  

E-Print Network (OSTI)

verursachte grossen Sachschaden an Wohnhäusern, Chalets, Alphütten, Strassen und Wäldern (SLF 2000). Das Ziel teilweise bis in den Talgrund bei Evolène (SLF 2000). Die durch die Lawine mitgerissene und hier untersuchte

Stoffel, Markus

478

Charakterisierung und Prparation von GaN und Herstellung von In-Plane-Gate Transistoren in AlxGa1-xN/GaN Heterostrukturen.  

E-Print Network (OSTI)

??Gegenstand der Arbeit sind GaN-Volumenmaterial und AlxGa1-xN/GaN HEMTs (high electron mobility transistor), welche ein zweidimensionales Elektronengas (2DEG) besitzen. Die Materialien wurden durch elektrische Messungen, insbesondere (more)

Ebbers, Andr

2003-01-01T23:59:59.000Z

479

Influence of pions on the hadron-quark phase transition  

SciTech Connect

In this work we present the features of the hadron-quark phase transition diagrams in which the pions are included in the system. To construct such diagrams we use two different models in the description of the hadronic and quark sectors. At the quark level, we consider two distinct parametrizations of the Polyakov-Nambu-Jona-Lasinio (PNJL) models. In the hadronic side, we use a well known relativistic mean-field (RMF) nonlinear Walecka model. We show that the effect of the pions on the hadron-quark phase diagrams is to move the critical end point (CEP) of the transitions lines. Such an effect also depends on the value of the critical temperature (T{sub 0}) in the pure gauge sector used to parametrize the PNJL models. Here we treat the phase transitions using two values for T{sub 0}, namely, T{sub 0}= 270 MeV and T{sub 0}= 190 MeV. The last value is used to reproduce lattice QCD data for the transition temperature at zero chemical potential.

Lourenco, O.; Dutra, M.; Frederico, T.; Malheiro, M. [Departamento de Fisica, Instituto Tecnologico de Aeronautica-CTA, 12228-900, Sao Jose dos Campos (Brazil); Delfino, A. [Instituto de Fisica, Universidade Federal Fluminense, Av. Litoranea s/n, 24210-150, Boa Viagem, Niteroi RJ (Brazil)

2013-05-06T23:59:59.000Z

480

Solar Energy without Neutrinos: Fusion Catalysis by Quarks  

Science Journals Connector (OSTI)

... some features of fusion catalysis by quarks and the consequences relating to release of stellar energy. In particular, the recent non-observation8 of ... . In particular, the recent non-observation8 of solar neutrinos which rules out9-12 the carbon cycle as the main mechanism for ...

L. MARSHALL LIBBY; F. J. THOMAS

1969-06-28T23:59:59.000Z

Note: This page contains sample records for the topic "quarks und leptonen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Precision Top-Quark Mass Measurements at CDF  

SciTech Connect

We present a precision measurement of the top-quark mass using the full sample of Tevatron {radical}s = 1.96 TeV proton-antiproton collisions collected by the CDF II detector, corresponding to an integrated luminosity of 8.7 fb{sup -1}. Using a sample of t{bar t} candidate events decaying into the lepton+jets channel, we obtain distributions of the top-quark masses and the invariant mass of two jets from the W boson decays from data. We then compare these distributions to templates derived from signal and background samples to extract the top-quark mass and the energy scale of the calorimeter jets with in situ calibration. The likelihood fit of the templates from signal and background events to the data yields the single most-precise measurement of the top-quark mass, mtop = 172.85 {+-} 0.71 (stat) {+-} 0.85 (syst) GeV/c{sup 2}.

Aaltonen, T.; /Helsinki Inst. of Phys.; Alvarez Gonzalez, B.; /Oviedo U. /Cantabria Inst. of Phys.; Amerio, S.; /INFN, Padua; Amidei, D.; /Michigan U.; Anastassov, A.; /Northwestern U. /Fermilab; Annovi, A.; /Frascati; Antos, J.; /Comenius U.; Apollinari, G.; /Fermilab; Appel, J.A.; /Fermilab; Arisawa, T.; /Waseda U.; Artikov, A.; /Dubna, JINR /Texas A-M

2012-07-01T23:59:59.000Z

482

Proton Sea Quark Flavour Asymmetry and Roper Resonance  

E-Print Network (OSTI)

We study the proton and the Roper resonance together with the meson cloud model, by constructing a Hamiltonian matrix and solving the eigenvalue equation. The proton sea quark flavour asymmetry and some properties of the Roper resonance are thus reproduced in one scheme.

Yong-Jun Zhang; Bin Zhang

2010-05-25T23:59:59.000Z

483

Baryon production and the charmed-quark fragmentation function  

Science Journals Connector (OSTI)

The fragmentation function for a charmed quark into a charmed baryon should peak at large x like its fragmentation function for charmed mesons. With model assumptions the decay of these fast baryons can account for as much as 20 to 40% of the ?'s observed at large x in e+e- annihilation at Ec.m.=30 GeV.

Thomas A. DeGrand

1982-12-01T23:59:59.000Z

484

Nucleosynthesis in neutron-rich ejecta from Quark-Novae.  

SciTech Connect

We explore heavy-element nucleosynthesis by rapid neutron capture (r-process) in the decompressing ejecta from the surface of a neutron star. The decompression is triggered by a violent phase transition to strange quark matter (quark-nova scenario). The presence of neutron-rich large Z nuclei (40,95) < (Z,A) < (70,177), the large neutron-to-seed ratio, and the low electron fraction Y{sub e} {approx} 0.03 in the decompressing ejecta present favorable conditions for the r-process. We perform network calculations that are adapted to the quark-nova conditions, and which mimic usual (n-{gamma}) equilibrium r-process calculations during the initially cold decompression phase. They match to dynamical r-process calculations at densities below neutron drip (4 x 10{sup 11} g cm{sup -3}). We present results for the final element abundance distribution with and without heating from nuclear reactions, and compare to the solar abundance pattern of r-process elements. We highlight the distinguishing features of quark-novae by contrasting it with conventional nucleosynthetic sites such as type II supernovae and neutron star mergers, especially in the context of heavy-element compositions of extremely metal-deficient stars.

Jaikumar, P.; Ouyed, R.; Otsuki, K.; Meyer, B. S.; Physics; Univ. of Calgary; Univ. of Chicago; Clemson Univ.

2007-01-01T23:59:59.000Z

485

Phase transitions in quark matter under strong magnetic fields  

SciTech Connect

In this work we use de SU(2) Nambu-Jona-Lasinio model to study the chiral transition at finite temperature, chemical potential and magnetic field. We show how the magnetic field affects the location of the critical end-point in the phase diagram, the constituent quark masses and the spinodal lines concerning the first order transition.

Garcia, Andre F.; Pinto, Marcus B. [Physics Department, Universidade Federal de Santa Catarina (Brazil)

2013-03-25T23:59:59.000Z

486

Heavy Quark Production in Deep-Inelastic Scattering at HERA  

E-Print Network (OSTI)

We discuss two topics in the production of heavy quarks in deep-inelastic scattering: the next-to-leading order Monte-Carlo HVQDIS and the next-to-leading logarithmic resummation of soft gluon effects, including estimates of next-to-next-to-leading order corrections therefrom.

B. W. Harris; E. Laenen; S. Moch; J. Smith

1999-05-18T23:59:59.000Z

487

Hypercentral Constituent Quark Model with a Meson Cloud  

E-Print Network (OSTI)

The results for the elastic nucleon form factors and the electromagnetic transition amplitudes to the Delta(1232) resonance, obtained with the Hypercentral Constituent Quark Model with the inclusion of a meson cloud correction are briefly presented. The pion cloud effects are explicitly discussed.

D. Y. Chen; Y. B. Dong; M. M. Giannini; E. Santopinto

2006-11-07T23:59:59.000Z

488

A Precision Measurement of the Mass of the Top Quark  

E-Print Network (OSTI)

The Standard Model of particle physics contains about two dozen parameters - such as particle masses - whose origins are still unknown and cannot be predicted, but whose values are constrained through their interactions. In particular, the masses of the top (t) quark (M_t) and W boson constrain the mass of the long-hypothesized, but thus far not observed, Higgs boson. A precise measurement of the top-quark mass can therefore point to where to look for the Higgs, and indeed whether the hypothesis of a SM Higgs is consistent with experimental data. Since top quarks are produced in pairs and decay in only ~10^-24 s into various final states, reconstructing their mass from their decay products is very challenging. Here we report a technique that extracts far more information from each top-quark event and yields a greatly improved precision on the top mass of 5.3 GeV/c^2, compared to previous measurements. When our new result is combined with our published measurement in a complementary decay mode and with the onl...

Abazov, V M; Abdesselam, A; Abolins, M; Abramov, V; Acharya, B S; Adams, D L; Adams, M; Ahmed, S N; Alexeev, G D; Alton, A; Alves, G A; Arnoud, Y; Avila, C; Babintsev, V V; Babukhadia, L; Bacon, Trevor C; Baden, A; Baffioni, S; Baldin, B Yu; Balm, P W; Banerjee, S; Barberis, E; Baringer, P; Barreto, J; Bartlett, J F; Bassler, U; Bauer, D; Bean, A; Beaudette, F; Begel, M; Belyaev, A; Beri, S B; Bernardi, G; Bertram, I; Besson, A; Beuselinck, R; Bezzubov, V A; Bhat, P C; Bhatnagar, V; Bhattacharjee, M; Blazey, G; Blekman, F; Blessing, S; Bhnlein, A; Bozhko, N; Bolton, T A; Borcherding, F; Bos, K; Bose, T; Brandt, A; Briskin, G; Brock, R; Brooijmans, G; Bross, A; Buchholz, D; Bhler, M; Bscher, V; Burtovoi, V S; Butler, J M; Canelli, F; Carvalho, W; Casey, D; Castilla-Valdez, H; Chakraborty, D; Chan, K M; Chekulaev, S V; Cho, D K; Choi, S; Chopra, S; Claes, D; Clark, A R; Connolly, B; Cooper, W E; Coppage, D; Crepe-Renaudin, S; Cummings, M A C; Cutts, D; Da Motta, H; Davis, G A; De, K; De Jong, S J; Demarteau, M; Demina, R; Demine, P; Denisov, D; Denisov, S P; Desai, S; Diehl, H T; Diesburg, M; Doulas, S; Dudko, L V; Duflot, L; Dugad, S R; Duperrin, A; Dyshkant, A; Edmunds, D; Ellison, J; Eltzroth, J T; Elvira, V D; Engelmann, R; Eno, S; Eppley, G; Ermolov, P; Eroshin, O V; Estrada, J; Evans, H; Evdokimov, V N; Ferbel, T; Filthaut, F; Fisk, H E; Fortner, M; Fox, H; Fu, S; Fuess, S; Gallas, E; Galjaev, A N; Gao, M; Gavrilov, V; Genik, R J; Genser, K; Gerber, C E; Gershtein, Yu; Ginther, G; Gmez, B; Goncharov, P I; Gounder, K; Goussiou, A; Grannis, P D; Greenlee, H; Greenwood, Z D; Grinstein, S; Groer, L; Grnendahl, S; Grnewald, M W; Gurzhev, S N; Guterrez, G; Guterrez, P; Hadley, N J; Haggerty, H; Hagopian, S; Hagopian, V; Hall, R E; Han, C; Hansen, S; Hauptman, J M; Hebert, C; Hedin, D; Heinmiller, J M; Heinson, A P; Heintz, U; Hildreth, M D; Hirosky, R; Hobbs, J D; Hoeneisen, B; Huang, J; Huang, Y; Iashvili, I; Illingworth, R; Ito, A S; Jaffr, M; Jain, S; Jesik, R; Johns, K; Johnson, M; Jonckheere, A; Jstlein, H; Juste, A; Kahl, W; Kahn, S; Kajfasz, E; Kalinin, A M; Karmanov, D; Karmgard, D; Kehoe, R; Kesisoglou, S; Khanov, A; Kharchilava, A I; Klima, B; Kohli, J M; Kostritskii, A V; Kotcher, J; Kothari, B; Kozelov, A V; Kozlovskii, E A; Krane, J; Krishnaswamy, M R; Krivkova, P; Krzywdzinski, S; Kubantsev, M A; Kuleshov, S; Kulik, Y; Kunori, S; Kupco, A; Kuznetsov, V E; Landsberg, G L; Lee, W M; Leflat, A; Lehner, F; Leonidopoulos, C; Li, J; Li, Q Z; Lima, J G R; Lincoln, D; Linn, S L; Linnemann, J; Lipton, R; Lucotte, A; Lueking, L; Lundstedt, C; Luo, C; Maciel, A K A; Madaras, R J; Malyshev, V L; Manankov, V; Mao, H S; Marshall, T; Martin, M I; Mattingly, S E K; Mayorov, A A; McCarthy, R; McMahon, T; Melanson, H L; Melnitchouk, A S; Merkin, M; Merritt, K W; Miao, C; Miettinen, H; Mihalcea, D; Mokhov, N V; Mondal, N K; Montgomery, H E; Moore, R W; Mutaf, Y D; Nagy, E; Narain, M; Narasimham, V S; Naumann, N A; Neal, H A; Negret, J P; Nelson, S; Nomerotski, A; Nunnemann, T; O'Neil, D; Oguri, V; Oshima, N; Padley, P; Papageorgiou, K; Parashar, N; Partridge, R; Parua, N; Patwa, A; Peters, O; Petroff, P; Piegaia, R; Pope, B G; Prosper, H B; Protopopescu, S D; Przybycien, M B; Qian, J; Rajagopalan, S; Rapidis, P A; Reay, N W; Reucroft, S; Ridel, M; Rijssenbeek, M; Rizatdinova, F K; Rockwell, T; Royon, C; Rubinov, P; Ruchti, R; Sabirov, B M; Sajot, G; Santoro, A F S; Sawyer, L; Schamberger, R D; Schellman, H; Schwartzman, A; Shabalina, E; Shivpuri, R K; Shpakov, D; Shupe, M; Sidwell, R A; Simk, V; Sirotenko, V I; Slattery, P F; Smith, R P; Snow, G R; Snow, J; Snyder, S; Solomon, J; Song, Y; Sorin, V; Sosebee, M; Sotnikova, N; Soustruznik, K; Souza, M; Stanton, N R; Steinbruck, G; Stoker, D; Stolin, V; Stone, A; Stoyanova, D A; Strang, M A; Strauss, M; Strovink, M; Stutte, L; Sznajder, A; Talby, M; Taylor, W; Tentindo-Repond, S; Trippe, T G; Turcot, A S; Tuts, P M; Van Kooten, R; Vaniev, V; Varelas, N; Villeneuve-Sguier, F; Volkov, A A; Vorobev, A P; Wahl, H D; Wang, Z M; Warchol, J; Watts, G; Wayne, M; Weerts, H; White, A; Whiteson, D; Wijngaarden, D A; Willis, S; Wimpenny, S J; Womersley, J; Wood, D R; Xu, Q; Yamada, R; Yasuda, T; Yatsunenko, Y A; Yip, K; Yu, J; Zanabria, M; Zhang, X; Zhou, B; Zhou, Z; Zielinski, M; Zieminska, D; Zieminski, A; Zutshi, V; Zverev, E G; Zylberstejn, A

2004-01-01T23:59:59.000Z

489

Weak interactions of quarks and leptons: experimental status  

SciTech Connect

The present experimental status of weak interactions is discussed with emphasis on the problems and questions and on the possible lines of future investigations. Major topics include; (1) the quark mixing matrix, (2) CP violation, (3) rare decays, (4) the lepton sector, and (5) right handed currents. 118 references. (WHK)

Wojcicki, S.

1984-09-01T23:59:59.000Z

490

Phase structure of cold magnetized quark matter within the SU(3) NJL model  

E-Print Network (OSTI)

The possible different phases of cold quark matter in the presence of a finite magnetic field and chemical potential are obtained within the SU(3) NJL model for two parameter sets often used in the literature. Although the general pattern is the same in both cases, the number of intermediate phases is parameter dependent. The chiral susceptibilities, as usually defined, are different not only for the s-quark as compared with the two light quarks, but also for the u and d-quarks, yielding non identical crossover lines for the light quark sector.

A. G. Grunfeld; D. P. Menezes; M. B. Pinto; N. N. Scoccola

2014-02-19T23:59:59.000Z

491

What does it mean to have `seen' the quark-gluon plasma?  

E-Print Network (OSTI)

Identifying the quark-gluon plasma requires convincing experimental evidence that partons move independently throughout the environment created in a heavy ion collision and with densities expected from equilibrium considerations. In lattice calculations, charge correlations suggest that quarks exist independently, and are not merely exchanged from hadronic object to another. Many experimental signatures (J/Psi suppression, quark number scaling, etc.) suggest that quarks are not confined to their original singlets, but these signatures do not make a clear case that quarks move independently or that they have the expected densities. I discuss a class of measurements that parallel lattice observables and has the prospect of investigating whether partonic charges move independently.

Scott Pratt

2012-10-01T23:59:59.000Z

492

Uncovering the single top: observation of electroweak top quark production  

SciTech Connect

The top quark is generally produced in quark and anti-quark pairs. However, the Standard Model also predicts the production of only one top quark which is mediated by the electroweak interaction, known as 'Single Top'. Single Top quark production is important because it provides a unique and direct way to measure the CKM matrix element V{sub tb}, and can be used to explore physics possibilities beyond the Standard Model predictions. This dissertation presents the results of the observation of Single Top using 2.3 fb{sup -1} of Data collected with the D0 detector at the Fermilab Tevatron collider. The analysis includes the Single Top muon+jets and electron+jets final states and employs Boosted Decision Tress as a method to separate the signal from the background. The resulting Single Top cross section measurement is: (1) {sigma}(p{bar p} {yields} tb + X, tqb + X) = 3.74{sub -0.74}{sup +0.95} pb, where the errors include both statistical and systematic uncertainties. The probability to measure a cross section at this value or higher in the absence of signal is p = 1.9 x 10{sup -6}. This corresponds to a standard deviation Gaussian equivalence of 4.6. When combining this result with two other analysis methods, the resulting cross section measurement is: (2) {sigma}(p{bar p} {yields} tb + X, tqb + X) = 3.94 {+-} 0.88 pb, and the corresponding measurement significance is 5.0 standard deviations.

Benitez, Jorge Armando; /Michigan State U.

2009-08-01T23:59:59.000Z

493

Questions and Answers - What kinds of quarks are protons and neutrons made  

NLE Websites -- All DOE Office Websites (Extended Search)

How many quarks are inprotons and neutrons? How many quarks are in<br>protons and neutrons? Previous Question (How many quarks are in protons and neutrons?) Questions and Answers Main Index Next Question (What is the charge of an up quark and of down quark?) What is the charge of an up quarkand of down quark? What kinds of quarks are protons and neutrons made of? What was the old name for the Top and Bottom quark? Protons are made of two Up and one Down quark. The neutron is made of two Down and one Up quark. The Up quarks have a 2/3 positive charge and the Down has a 1/3 negative charge. Fractional charges are a pretty funny concept, but remember we (humans) made up the unit of charge that a proton has, so its very possible that there could be a smaller division of charge. If you add those charges you will see that sum is positive one for the

494

ber Metallalkyl- und -aryl-Verbindungen: XXXVII. Strukturverfeinerung von Methylkalium. Darstellung von KCD3 und Neutronenbeugungsuntersuchung bei 1.35 und 290 K  

Science Journals Connector (OSTI)

The crystal structure of methylpotassium has been refined by neutron diffraction carried out on powder samples of KCD3 at 1.35 and 290 K. Pyramidal methyl ions were found with bond angles of 105 at 1.35 K and of 109 at 290 K, which are comparable to those of NH3. In the crystal the methyl ions have alernating orientations and each carbanion is coordinated by six K ions in a distorted trigonal-prismatic array. The three K ions close to the sp3 lone electron pair have short K?C contacts (2 295, 1 302 pm), whereas the K iions close to the H atoms have longer K?C distances (2 344, 1 330 pm). An orthorhombic umit cell (Pmcn, Nr. 62, a 419.56(2), b 730.73(3), c 816.44(3) pm, Z = 4, 1.35 K) has now been found as compared to the smaller hexagonal cell (Z = 2) detected previously by X-ray methods (without precise location of the H atoms). The preparation of KCD3 and LiCD3 is described and IR data of KCD3 are given. Zusammenfassung Die Kristallstruktur von Methylkalium wurde an Pulverproben von KCD3 durch Neutronenbeugung bei 1.35 und 290 K bestimmt. Es ergaben sich pyramidale Methyl-Anionen mit Bindungswinkeln 105 (1.35 K) bzw. 109 (290 K), hnlich denen von NH3. Im Kristall haben die Methyl-Ionen alternierende Orientierungen; jedes Carbanion ist verzerrt trigonal-prismatisch durch sechs K-Ionen koordiniert. Drei dem freien sp3-Elektronenpaar benachbarte K-Ionen haben kurze K?C-Kontakte (2 295, 1 302 pm), wogegen die den H-Atomen benachbarten K-Ionen lngere K?C-Abstnde zeigen (2 344, 1 330 pm). Eine orthorhombische Elementarzelle (Pmcn, Nr. 62, a 419.56(2), b 730.73(8), c 816.44(3) pm, Z = 4, 1.35 K) wurde jetzt gefunden anstelle der frher rntgenographisch ermittelten kleineren hexagonalen Zelle (ohen genaue H-Atomlagen). Die Darstellung von KCD3 und LiCD3 wird beschrieben und IR-Daten fr KCD3 werden mitgeteilt.

Erwin Weiss; Thomas Lambertsen; Bernd Schubert; Jeremy Karl Cockcroft

1988-01-01T23:59:59.000Z

495

Leben Und Bildung In Den Klostern Des Fruhen Mittelalters Nach Scheffels "Ekkehard" Und Freytags "Das Nest Der Zaunkonige" Bearbeitet  

E-Print Network (OSTI)

IEBSH UID BILDUBG- Hi DSN KLOSTEHH PES PRUHm MITTELALTERS MUH SEKPMBLS "EKKEHARD11 UBD FREY TAGS "LAS NEST DER ZAUNKNIGE" BEARBEITET von ELIZABETH APEL, Date A thesis submitted to the Department of German and the Faculty of the Graduate... School in partial fulfillment of the require- ments for the Master1s degree. pgJL Department of German. / f lA BIBLIOGRAPHY Proelss, Johannes J# 7. von Scheffels Gesammelte Werke in sechs Bnden. Erster und zweiter Band. Adolf Bonz & Co...

Apel, Elizabeth

1915-06-05T23:59:59.000Z

496

Microsoft Word - QuarkNet Friday Flyer.docx  

NLE Websites -- All DOE Office Websites (Extended Search)

Flyer, March 15, 2013 SPECIAL EDITION Flyer, March 15, 2013 SPECIAL EDITION QuarkNet Workshops Since 1999, QuarkNet has introduced teachers to inquiry-based investigations using particle physics data. Select workshops from this menu for your center programs. Contacts can answer your questions and schedule a workshop. Teaching and Learning Workshop (2-3 days) - Contact Tom: jordant@fnal.gov This workshop introduces teachers to inquiry-based resources that incorporate particle physics content. We tailor this workshop to the needs and interests of the center and provide teachers with investigations that can be used in a high school classroom. The following workshops prepare teachers to facilitate data analysis for students, from scaffolding to investigation and reporting using different datasets.

497

Chiral Magnetic Effect in the Anisotropic Quark-Gluon Plasma  

E-Print Network (OSTI)

An anisotropic thermal plasma phase of a strongly coupled gauge theory can be holographically modelled by an anisotropic AdS black hole. The temperature and anisotropy parameter of the AdS black hole background of interest [1] is specified by the location of the horizon and the value of the Dilaton field at the horizon. Interestingly, for the first time, we obtain two functions for the values of the horizon and Dilaton field in terms of the temperature and anisotropy parameter. Then by introducing a number of spinning probe D7-branes in the anisotropic background, we compute the value of the chiral magnetic effect (CME). We observe that in the isotropic and anisotropic plasma the value of the CME is equal for the massless quarks. However, at fixed temperature, raising the anisotropy in the system will increase the value of the CME for the massive quarks.

Mohammad Ali-Akbari; Seyed Farid Taghavi

2014-08-27T23:59:59.000Z

498

Onset of cavitation in the quark-gluon plasma  

E-Print Network (OSTI)

We study the onset of bubble formation (cavitation) in the quark-gluon plasma as a result of the reduction of the effective pressure from bulk-viscous corrections. By calculating velocity gradients in typical models for quark-gluon plasma evolution in heavy-ion collisions, we obtain results for the critical bulk viscosity above which cavitation occurs. Since present experimental data for heavy-ion collisions seems inconsistent with the presence of bubbles above the phase transition temperature of QCD, our results may be interpreted as an upper limit of the bulk viscosity in nature. Our results indicate that bubble formation must occur at temperatures below 140 MeV, consistent with the expectation of hadronisation in low temperature QCD.

Habich, Mathis

2014-01-01T23:59:59.000Z

499

Forward-backward asymmetry in top quark-antiquark production  

SciTech Connect

We present a measurement of forward-backward asymmetry in top quark-antiquark production in proton-antiproton collisions in the final state containing a lepton and at least four jets. Using a dataset corresponding to an integrated luminosity of 5.4 fb-1, collected by the D0 experiment at the Fermilab Tevatron Collider, we measure the t{bar t} forward-backward asymmetry to be (9.2 3.7)% at the reconstruction level. When corrected for detector acceptance and resolution, the asymmetry is found to be (19.6 6.5)%. We also measure a corrected asymmetry based on the lepton from a top quark decay, found to be (15.2 4.0)%. The results are compared to predictions based on the next-to-leading-order QCD generator mc@nlo. The sensitivity of the measured and predicted asymmetries to the modeling of gluon radiation is discussed.

Abazov, Victor Mukhamedovich [Dubna, JINR; Abbott, Braden Keim [Oklahoma U.; Acharya, Bannanje Sripath [Tata Inst.; Adams, Mark Raymond [Illinois U., Chicago; Adams, Todd [Florida State U.; Alexeev, Guennadi D [Dubna, JINR; Alkhazov, Georgiy D [St. Petersburg, INP; Alton, Andrew K [Michigan U.; Augustana Coll., Sioux Falls; Alverson, George O [Northeastern U.; Alves, Gilvan Augusto [Rio de Janeiro, CBPF; Aoki, Masato [Fermilab; Louisiana Tech. U.

2011-12-12T23:59:59.000Z

500

Search for electroweak single top quark production with CDF  

SciTech Connect

We report on a search for Standard Model t-channel and s-channel single top quark production in p{bar p} collisions at a center of mass energy of 1.96 TeV. We use a data sample corresponding to 162 pb{sup -1} recorded by the upgraded Collider Detector at Fermilab. We find no significant evidence for electroweak top quark production and set upper limits at the 95% confidence level on the production cross section, consistent with the Standard Model: 10.1 pb for the t-channel, 13.6 pb for the s-channel and 17.8 pb for the combined cross section of t- and s-channel.

Kemp, Y.; /Karlsruhe U.

2005-01-01T23:59:59.000Z