Measurement of the $e^+ e^- \to W^+ W^-$ cross section and W decay branching fractions at LEP
- Abbiendi, G.
- Ainsley, C.
- Akesson, P.F.
- Alexander, G.
- Anagnostou, G.
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- Bell, Kenneth Watson
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- Duerdoth, I.P.
- Etzion, E.
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- Fiedler, F.
- Fleck, I.
- Ford, M.
- Frey, A.
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- Gary, John William
- Geich-Gimbel, C.
- Giacomelli, G.
- Giacomelli, P.
- Giunta, Marina
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- Strom, David M.
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- Ueda, I.
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- Vannerem, P.
- Vertesi, R.
- Verzocchi, M.
- Voss, H.
- Vossebeld, J.
- Ward, C.P.
- Ward, D.R.
- Watkins, P.M.
- Watson, A.T.
- Watson, N.K.
- Wells, P.S.
- Wengler, T.
- Wermes, N.
- Wilson, G.W.
- Wilson, J.A.
- Wolf, G.
- Wyatt, T.R.
- Yamashita, S.
- Zer-Zion, D.
- Zivkovic, Lidija
DOIAbstract
From a total data sample of 701.1 pb^-1 recorded with e+e- centre-of-mass energies of sqrt = 161-209 GeV with the OPAL detector at LEP, 11693 W-pair candidate events are selected. These data are used to obtain measurements of the W-pair production cross sections at 10 different centre-of-mass energies. The ratio of the measured cross sections to the Standard Model expectation is found to be: data/SM = 1.002 +- 0.011(stat.) +- 0.007(syst.) +- 0.005(theory), where the uncertainties are statistical, experimental systematics and theory systematics respectively. The data are used to determine the W boson branching fractions, which are found to be consistent with lepton universality of the charged current interaction. Assuming lepton universality...
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