Direct Measurement of the W Boson Width in pp Collisions at {radical}(s)=1.96 TeV

Journal Article · Fri Feb 22 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.071801· OSTI ID:21024782

Aaltonen, T; Maki, T; Mehtala, P; Orava, R; Osterberg, K; Saarikko, H; Remortel, N van ^[1]; Adelman, J; Brubaker, E; Fedorko, W T; Grosso-Pilcher, C; Kim, Y K; Kwang, S; Levy, S; Paramonov, A A; Schmidt, M A; Shochet, M; Wolfe, C; Yang, U K; Yorita, K ^[2]

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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. Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)

A direct measurement of the total decay width of the W boson {gamma}{sub W} is presented using 350 pb{sup -1} of data from pp collisions at {radical}(s)=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The width is determined by normalizing predicted signal and background distributions to 230 185 W candidates decaying to e{nu} and {mu}{nu} in the transverse-mass region 50<M{sub T}<90 GeV and then fitting the predicted shape to 6055 events in the high-M{sub T} region, 90<M{sub T}<200 GeV. The result is {gamma}{sub W}=2032{+-}45{sub stat}{+-}57{sub syst} MeV, consistent with the standard model expectation.

• OSTI ID: 21024782
• Journal Information: Physical Review Letters, Vol. 100, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.100.071801; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). CDF Collaboration; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
GEV RANGE 100-1000
PARTICLE WIDTHS
PROTON-PROTON INTERACTIONS
STANDARD MODEL
TEV RANGE 01-10
W MINUS BOSONS
W PLUS BOSONS