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

Conference · Fri Jul 01 04:00:00 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., 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
• Country of Publication: United States
• Language: English

Related Subjects

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