Extraction of the width of the $W$ boson from measurements of $\sigma(p\bar{p} \to W + X) \times B(W \to e \nu)$ and $\sigma(p\bar{p} \to Z + X) \times B(Z \to e e)$ and their ratio

Abbott, B.

doi:10.1103/PhysRevD.61.072001

Extraction of the width of the $$W$$ boson from measurements of $$\sigma(p\bar{p} \to W + X) \times B(W \to e \nu)$$ and $$\sigma(p\bar{p} \to Z + X) \times B(Z \to e e)$$ and their ratio

Journal Article · Tue Jun 01 04:00:00 EDT 1999 · Phys.Rev.D

DOI:https://doi.org/10.1103/PhysRevD.61.072001· OSTI ID:1893457

Abbott, B.

We report on measurements of inclusive cross sections times branching fractions into electrons for W and Z bosons produced in ppbar collisions at sqrts=1.8 TeV.From an integrated luminosity of 84.5 inverse pb recorded in 1994--1995 using the D0 detector at the Fermilab Tevatron, we determine sigma(ppbar->W+X)B(W->e nu) = 2310 +- 10(stat) +- 50(syst) +- 100(lum) pb and sigma(ppbar->Z+X)B(Z->e e) = 221 +- 3(stat) +- 4(syst) +- 10(lum) pb. From these, we derive their Ratio R = 10.43 +- 0.15(stat) +- 0.20(syst) +- 0.10(NLO), B(W->e nu) = 0.1066 +- 0.0015(stat) +- 0.0021(syst) +- 0.0011(theory)+- 0.0011(NLO), and Gamma_W = 2.130 +- 0.030(stat) +- 0.041(syst) +- 0.022(theory) +- 0.021(NLO) GeV. We use the latter to set a 95% confidence level upper limit on the partial decay width of the W boson into non-standard model final states, Gamma_W^{inv}, of 0.168 GeV. Combining these results with those from the 1992--1993 data gives R = 10.54 +- 0.24, Gamma_W = 2.107 +- 0.054 GeV, and a 95% C.L. upper limit on Gamma_W^{inv} of 0.132 GeV. Using a sample with a luminosity of 505 inverse nb taken at sqrts=630 GeV, we measure sigma(ppbar->W+X)B(W->e nu) = 658 +- 67 pb.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: D0

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1893457

Report Number(s):: FERMILAB-PUB-99-171-E; arXiv:hep-ex/9906025; oai:inspirehep.net:501703

Journal Information:: Phys.Rev.D, Journal Name: Phys.Rev.D Vol. 61

Country of Publication:: United States

Language:: English

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