Measurement of the top-quark mass in the lepton+jets channel using a matrix element technique with the CDF II detector

Journal Article · Sat Oct 01 04:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.071105· OSTI ID:21607731

Aaltonen, T; Brucken, E; Devoto, F; Mehtala, P; Orava, R ^[1]; Alvarez Gonzalez, B; Casal, B; Cuevas, J; Gomez, G; Palencia, E; Rodrigo, T; Ruiz, A; Scodellaro, L; Vila, I; Vilar, R; Vizan, J ^[2]; Amerio, S; d'Ascenzo, N; Dorigo, T; Totaro, P ^[3]

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1. Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
2. Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander (Spain)
3. Istituto Nazionale di Fisica Nucleare, Sezione di Padova-Trento, I-35131 Padova (Italy)

A measurement of the top-quark mass is presented using Tevatron data from proton-antiproton collisions at center-of-mass energy {radical}(s)=1.96 TeV collected with the CDF II detector. Events are selected from a sample of candidates for production of tt pairs that decay into the lepton+jets channel. The top-quark mass is measured with an unbinned maximum likelihood method where the event probability density functions are calculated using signal and background matrix elements, as well as a set of parametrized jet-to-parton transfer functions. The likelihood function is maximized with respect to the top-quark mass, the signal fraction in the sample, and a correction to the jet energy scale (JES) calibration of the calorimeter jets. The simultaneous measurement of the JES correction ({Delta}{sub JES}) amounts to an additional in situ jet energy calibration based on the known mass of the hadronically decaying W boson. Using the data sample of 578 lepton+jets candidate events, corresponding to 3.2 fb{sup -1} of integrated luminosity, the top-quark mass is measured to be m{sub t}=172.4{+-}1.4(stat+{Delta}{sub JES}){+-}1.3(syst) GeV/c{sup 2}.

• OSTI ID: 21607731
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 84; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
CALIBRATION
CALORIMETERS
CENTER-OF-MASS SYSTEM
CORRECTIONS
CYCLIC ACCELERATORS
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
FERMIONS
FUNCTIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTONS
LUMINOSITY
MASS
MATHEMATICAL SOLUTIONS
MATRIX ELEMENTS
MAXIMUM-LIKELIHOOD FIT
MEASURING INSTRUMENTS
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL SOLUTION
OPTICAL PROPERTIES
PARTICLE DECAY
PARTICLE INTERACTIONS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
PROBABILITY DENSITY FUNCTIONS
PROTON-ANTIPROTON INTERACTIONS
QUARKS
RADIATION DETECTORS
SYNCHROTRONS
T QUARKS
TEV RANGE
TEV RANGE 01-10
TOP PARTICLES
TRANSFER FUNCTIONS
W MINUS BOSONS
W PLUS BOSONS