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
- New York University, New York, New York 10003 (United States)
- Michigan State University, East Lansing, Michigan 48824 (United States)
- Institute for High Energy Physics, Protvino, Russia (Russian Federation)
- Tata Institute of Fundamental Research, Mumbai, (India)
- Columbia University, New York, New York 10027 (United States)
- Rice University, Houston, Texas 77005 (United States)
- University of Illinois at Chicago, Chicago, Illinois 60607 (United States)
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
- Institute for Theoretical and Experimental Physics, Moscow, Russia (Russian Federation)
- 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, Vol. 61, Issue 7; Other Information: PBD: 1 Apr 2000; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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