Extraction of the width of the W boson from measurements of {sigma}(pp(bar sign){yields}W+X)xB(W{yields}e{nu}) and {sigma}(pp(bar sign){yields}Z+X)xB(Z{yields}ee) and their ratio

Journal Article · Sat Apr 01 04:00:00 EST 2000 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.61.072001· OSTI ID:20215946

Abbott, B ^[1]; Abolins, M ^[2]; Abramov, V ^[3]; Acharya, B S ^[4]; Adam, I ^[5]; Adams, D L ^[6]; Adams, M ^[7]; Ahn, S ^[8]; Akimov, V ^[9]; Alves, G A ^[10]

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1. New York University, New York, New York 10003 (United States)
2. Michigan State University, East Lansing, Michigan 48824 (United States)
3. Institute for High Energy Physics, Protvino, Russia (Russian Federation)
4. Tata Institute of Fundamental Research, Mumbai, (India)
5. Columbia University, New York, New York 10027 (United States)
6. Rice University, Houston, Texas 77005 (United States)
7. University of Illinois at Chicago, Chicago, Illinois 60607 (United States)
8. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
9. Institute for Theoretical and Experimental Physics, Moscow, Russia (Russian Federation)
10. LAFEX, Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, (Brazil)

We report on measurements on inclusive cross sections times branching fractions into electrons for W and Z bosons produced in pp(bar sign) collisions at {radical}(s)=1.8 TeV. From an integrated luminosity of 84.5 pb-1 recorded in 1994-1995 using the DOe detector at the Fermilab Tevatron, we determine {sigma}(pp(bar sign){yields}W+X)xB(W{yields}e{nu})=2310{+-}10(stat){+-}50(syst){+-}100(lum)pb and {sigma}(pp(bar sign){yields}Z+X)xB(Z{yields}ee)=221{+-}3(stat){+-}4(syst){+-}10(lum)pb. From these, we derive {sigma}(pp(bar sign){yields}W+X)xB(W{yields}e{nu})/{sigma}(pp(bar sign){yields}Z+X)xB(Z{yields}ee)=10.43{+-}0.15(stat){+-}0.20(syst){+-}0.10(NLO), B(W{yields}e{nu})=0.1044{+-}0.0015(stat){+-}0.0020(syst){+-}0.0017(theory){+-}0.00= 10(NLO), and {gamma}{sub W}=2.169{+-}0.031(stat){+-}0.042(syst){+-}0.041(theory){+-}0.022(NLO)Ge= V. We use the latter to set a 95% confidence level upper limit on the partial decay width of the W boson into nonstandard model final states, {gamma}{sub W}{sup inv}, of 0.213 GeV. Combining these results with those from the 1992-1993 data gives {sigma}(pp(bar sign){yields}W+X)xB(W{yields}e{nu})/{sigma}(pp(bar sign){yields}Z+X)xB(Z{yields}ee)=10.51{+-}0.25, {gamma}{sub W}=2.152{+-}0.066 GeV, and a 95% C.L. upper limit on {gamma}{sub W}{sup inv} of 0.191 GeV. Using a sample with a luminosity of 505 nb-1 taken at {radical}(s)=630 GeV, we measure {sigma}(pp(bar sign){yields}W+X)xB(W{yields}e{nu})=658{+-}67 pb. (c) 2000 The American Physical Society.

• OSTI ID: 20215946
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 61; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
CROSS SECTIONS
EXPERIMENTAL DATA
FERMILAB TEVATRON
INTERMEDIATE BOSONS
PROTON-ANTIPROTON INTERACTIONS
W MINUS BOSONS
W PLUS BOSONS
Z NEUTRAL BOSONS