Measurements of the mass and width of the W Boson from CDF

Conference · Fri Jul 01 00:00:00 EDT 1994

OSTI ID:10167937

Kim, Young-Kee ^[1]

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1. Lawrence Berkeley Lab., CA (United States)

We have made a preliminary determination of the W boson mass, M{sub W} = 80.38 {plus_minus} 0.23 GeV/c{sup 2} from a combined analysis of W {yields} e{nu} in {bar p} collisions at {radical}s = 1.8 TeV. The electron data alone yields M{sub W} = 80.47 {plus_minus} 0.15(stat.) {plus_minus} 0.25(syst.) GeV/c{sup 2}, while the muon data gives M{sub W} = 80.29 {plus_minus} 0.20(stat.) {plus_minus} 0.24(syst.) GeV/c{sup 2}. Measuring the ratio {sigma}{sub W}{center_dot}B(W{yields}e{nu}) / {sigma}{sub Z} {yields} e{sup +}e{sup {minus}}, we have extracted a value for the W width, {Gamma}(W) = 2.063 {plus_minus} 0.061(stat.) {plus_minus} 0.060(syst.) GeV and the branching ratio, {Gamma}(W {yields} e{nu})/{Gamma}(W) = 0.1094 {plus_minus} 0.0033(stat.) {plus_minus} 0.0031(syst.). This allows us to set a decay mode independent limit on the top quark mass, M{sub top} > 62 GeV/c{sup 2} at the 95% C.L.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 10167937
• Report Number(s): FNAL/C-94/169-E; CONF-940327-8; ON: DE94015380; TRN: 94:016581
• Resource Relation: Conference: 29. Moriond meeting on quantum chromodynamics and high energy hadronic interactions,Les Arcs (France),12-26 Mar 1994; Other Information: PBD: [1994]
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
W MINUS BOSONS
REST MASS
MASS SPECTRA
W PLUS BOSONS
FERMILAB COLLIDER DETECTOR
PROTON-ANTINEUTRON INTERACTIONS
BRANCHING RATIO
TOP PARTICLES
LEPTONIC DECAY
LINE WIDTHS
662380
662440
DECAYS OF INTERMEDIATE BOSONS
PROPERTIES OF OTHER PARTICLES INCLUDING HYPOTHETICAL PARTICLES