W-BOSON AND Z-BOSON PRODUCTION IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8 TEVстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The inclusive cross sections times leptonic branching ratios for W and Z boson production in p (p) over bar collisions at root s = 1.8 TeV were measured using the D0 detector at the Fermi-lab Tevatron collider: sigma(W)B(W --> e nu) = 2.36 +/- 0.07 +/- 0.13 nb, sigma(W)B(W --> mu nu) = 2.09 +/- 0.23 +/- 0.11 nb, sigma(Z)B(Z --> e(+)e(-)) = 0.218 +/- 0.011 +/- 0.012 nb, and sigma(Z)B(Z --> mu(+)mu(-)) = 0.178 +/- 0.030 +/- 0.009 nb. The first error is the combined statistical and systematic uncertainty, and the second reflects the uncertainty in the luminosity. For the combined electron and muon analyses we find sigma(W)B(W --> l nu)/sigma(Z)B(Z --> l(+)l(-)) = 10.90 +/- 0.49. Assuming standard model couplings, this result is used to determine the width of the W boson, Gamma(W) = 2.044 +/- 0.093 GeV.