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The authors present the first measurements of[sigma](p[bar p][yields] W[yields][ell][nu]) and[sigma](p[bar p][yields] Z[yields][ell][ell]) at[radical]s= 1.96 TeV, along with new measurements of W angular-decay distributions in p[bar p] collisions at[radical]s= 1.8 TeV.
The CDF and D0 collaborations have analyzed up to {approx} 200 pb{sup -1} of Run 2 physics data to measure W production properties such as the W cross section, the W width, lepton universality and the W charge asymmetry. From the cross section measurements, CDF obtains a lepton universality of g{sub {mu}}/g{sub e} = 0.998 {+-} 0.012 and g{sub {tau}}/g{sub e} = 0.99 {+-} 0.04 and an indirect W width of {Lambda}{sub W} = 2079 {+-} 41 MeV. D0 measured the W width directly and finds {Lambda}{sub W} = 2011 {+-} 142 MeV. CDF has estimated the uncertainties on the W boson mass measurements in the electron and muon decay channels and obtains an overall uncertainty of 76 MeV.
Recent results from the CDF and D0 Experiments at the Fermilab Tevatron Collider are presented for the W and Z boson production cross sections, the W boson width, rare W boson decays, trilinear gauge boson couplings, and the W boson mass.
The first precision measurements on CP violation in the B system are reported. Both the BELLE and the BABAR collaboration presented, among others, results for sin 2ß with much improved accuracy. Results from the Sudbury Neutrino Observatory, SNO, also deserve to be mentioned. The convincing evidence of solar neutrino oscillations had been presented by SNO prior to the conference; a full presentation was given at the conference. An incredibly precise measurement of the anomalous magnetic moment of the muon is reported, a fresh result from the Brookhaven National Laboratory. Apart from these distinct physics highlights, there are also the first results from the new Tevatron run and from the relativistic heavy ion collider RHIC. Theorists write of our ever better understanding of the Standard Model and of what might lie beyond. Risky as it is to highlight only a couple of exciting subjects, it is merely meantto whet the appetite for further reading.
The authors present recent results from CDF and D0 on W and Z production cross sections, the width of the W boson, [tau]-e universality in W decays, trilinear gauge boson couplings, and on the observation of Z[r[underscore]arrow] b[anti b].
The authors present recent Tevatron Run II results from CDF and D0 on the production and decay properties of the W boson.
The D0 experiment collected ≈ 15 pb−1 in run 1A (1992- 1993) and ≈89 pb−1 in run 1B (1994-1995) of the Fermilab Tevatron Collider using p{anti p} collisions at √s = 1.8 TeV. Results from analyses of events with W and Z bosons are presented for the run 1B data samples. From W → e[nu], [mu][nu] and Z → ee, [mu][mu] decays, the W and Z production cross sections and the W width are determined. Events with W → [tau][nu] decays are used to determine the ratio of the electroweak gauge coupling constants as a measure of lepton universality. Using W → e[nu] and Z → ee decays, the W boson mass is measured.
The D0 experiment collected[approx] 15 pb[sup -1] in run 1A (1992- 1993) and[approx] 89 pb[sup -1] in run 1B (1994-1995) of the Fermilab Tevatron Collider using p[anti p] collisions at[radical]s= 1.8 TeV. Results from analyses of events with W and Z bosons are presented for the run 1B data samples. From W[yields] e[nu], [mu][nu] and Z[yields] ee, [mu][mu] decays, the W and Z production cross sections and the W width are determined. Events with W[yields][tau][nu] decays are used to determine the ratio of the electroweak gauge coupling constants as a measure of lepton universality. Using W[yields] e[nu] and Z[yields] ee decays, the W boson mass is measured.
The CDF and D0 collaborations have used recent data taken at the Tevatron to perform QCD tests with W and Z bosons decaying leptonically. D0 measures the production cross section times branching ratio for W and Z bosons. This also gives an indirect measurement of the total width of the W boson: [Lambda][sub W] = 2.126 [+-] 0.092 GeV. CDF reports on a direct measurement of [Lambda][sub W] = 2.19 [+-] 0.19 GeV, in good agreement with the indirect determination and Standard Model predictions. D0's measurement of the differential d[sigma]/dp[sub T] distribution for W and Z bosons decaying to electrons agrees with the combined QCD perturbative and resummation calculations. In addition, the d[sigma]/dp[sub T] distribution for the Z boson discriminates between different vector boson production models. Studies of W + Jet production at CDF find the NLO QCD prediction for the production rate of W + [ge] 1 Jet events to be in good agreement with the data.
The two detectors at the Fermilab Tevatron, D0 and CDF, have collected large samples of W and Z decays. With these data measurements of the properties of the W boson have been performed. From the ratio of the W and Z production cross sections a measurement of the W boson width of 2.062 " 0.059 GeV has been obtained. The W boson mass has been measured to be 80.34 " 0.15 GeV. Both detectors have observed diboson production and measured the triple gauge boson couplings. No deviations from Standard Model predictions have been observed.