A measurement of the W boson mass at the Fermilab p(p)over-bar colliderстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We report a measurement of the W boson mass based on an integrated luminosity of 82 pb(-1) from <p(p)over bar> collisions at root s = 1.8 TeV recorded in 1994-1995 by the DO detector at the Fermilab We identify W bosons by their decays to ev and extract the mass by fitting the transverse mass spectrum from 28 323 W boson candidates. A sample of 3563 dielectron events, mostly due to Z --> ee decays, constrains models of W boson production and the detector. We measure M-W = 80.44 +/- 0.10(stat) +/- 0.07(syst) GeV. By combining this measurement with our result form the 1992-1993 data set, we obtain M-W = 80.43 +/- 0.11 GeV.