You need JavaScript to view this

Mass-producing B mesons

Abstract

Since the discovery of the upsilon resonances in 1977 the physics of the fifth quark - beauty - has played a vital role in establishing and consolidating today's Standard Model of particle physics. In recent years, a wealth of data on B particle (containing the beauty quark) has emerged from the detectors ARGUS (at the DORIS ring, DESY, Hamburg) and CLEO (at the Cornell CESR ring) as well as from CERN's LEP electron-positron collider and the proton-antiproton colliders at CERN and Fermilab. But the most challenging goal of this physics is to explore the mystery of CP violation, so far only seen in neutral kaon decays. This subtle mechanism - a disregard for the combined symmetry of particle antiparticle switching and left-right reflection - possibly moulded the evolution of the Universe after the Big Bang, providing a world dominated by matter, rather than one where matter and antimatter play comparable roles. To fully explore CP violation in the laboratory needs a dedicated machine - a particle 'factory' - to mass produce B mesons. Only when this full picture of CP violation has been revealed will physicists finally be able to solve its mysteries. As well as major proposals in the  More>>
Publication Date:
Jun 15, 1993
Product Type:
Journal Article
Report Number:
INIS-XC-15A0918
Resource Relation:
Journal Name: CERN Courier; Journal Volume: 33; Journal Issue: 5; Other Information: 1 fig.; Country of input: International Atomic Energy Agency (IAEA)
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B MESONS; B QUARKS; BOTTOMONIUM; CERN; CESR STORAGE RING; CP INVARIANCE; DESY; FERMILAB; KAONS NEUTRAL; KOBAYASHI-MASKAWA MATRIX; LEP STORAGE RINGS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; STANDARD MODEL; T QUARKS; VECTOR MESONS; WEAK NEUTRAL CURRENTS; Z*BARYONS
OSTI ID:
22458897
Country of Origin:
CERN
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0304-288X; CODEN: CECOA2; TRN: XC15A0918028492
Availability:
Also available on-line: http://cds.cern.ch/record/1732157/files/vol33-issue5-p016-e.pdf
Submitting Site:
INIS
Size:
page(s) 16-18
Announcement Date:
Mar 25, 2016

Citation Formats

Aleksan, Roy, and Ali, Ahmed. Mass-producing B mesons. CERN: N. p., 1993. Web.
Aleksan, Roy, & Ali, Ahmed. Mass-producing B mesons. CERN.
Aleksan, Roy, and Ali, Ahmed. 1993. "Mass-producing B mesons." CERN.
@misc{etde_22458897,
title = {Mass-producing B mesons}
author = {Aleksan, Roy, and Ali, Ahmed}
abstractNote = {Since the discovery of the upsilon resonances in 1977 the physics of the fifth quark - beauty - has played a vital role in establishing and consolidating today's Standard Model of particle physics. In recent years, a wealth of data on B particle (containing the beauty quark) has emerged from the detectors ARGUS (at the DORIS ring, DESY, Hamburg) and CLEO (at the Cornell CESR ring) as well as from CERN's LEP electron-positron collider and the proton-antiproton colliders at CERN and Fermilab. But the most challenging goal of this physics is to explore the mystery of CP violation, so far only seen in neutral kaon decays. This subtle mechanism - a disregard for the combined symmetry of particle antiparticle switching and left-right reflection - possibly moulded the evolution of the Universe after the Big Bang, providing a world dominated by matter, rather than one where matter and antimatter play comparable roles. To fully explore CP violation in the laboratory needs a dedicated machine - a particle 'factory' - to mass produce B mesons. Only when this full picture of CP violation has been revealed will physicists finally be able to solve its mysteries. As well as major proposals in the US and Japan, several ideas have been launched in Europe. Over the years, many working groups have accumulated an impressive amount of data and knowledge on the physics as well as on the machine and detectors. The spearheads of experimental B physics are the ARGUS and CLEO collaborations. Highlights include the determination of the parameters of the (Cabibbo-Kobayashi-Maskawa, CKM) quark mixing matrix, testing the consistency of the Standard Model with six quarks and three leptons, and giving the first indirect hint that the as yet unseen sixth ('top') quark is very heavy, together with initial indications of how it should decay. Valuable complementary information has come from proton-antiproton collider data and particularly from the LEP experiments at the Z resonance. Experiments at LEP have measured average and individual lifetimes of the various B hadron species as well as the weak neutral current properties of the b quark, while both electron- positron and proton-antiproton studies have been able to establish a significant signal for neutral B mixing. The Bs-meson (containing a strange antiquark and a b quark) and lambda-b baryon have been seen by experiments at CERN.}
journal = {CERN Courier}
issue = {5}
volume = {33}
journal type = {AC}
place = {CERN}
year = {1993}
month = {Jun}
}