The top quark is the heaviest known elementary particle, with
a mass about 40 times larger than the mass of its isospi+n partner,
the bottom quark. It decays almost 100% of the time to a W boson and a
bottom quark. Using top-antitop pairs at the Tevatron proton-antiproton
collider, the CDF and D0 Collaborations have measured the top quark’s
mass in different final states for integrated luminosities of up to
5.8 fb-1. This paper reports on a combination of these measurements
that results in a more precise value of the mass than any individual
decay channel can provide. It describes the treatment of the systematic
uncertainties and their correlations. The mass value determined is
173.18±0.56 (stat)±0.75 (syst) GeV or 173.18±0.94 GeV,
which has a precision of ±0.54%, making this the most precise
determination of the top-quark mass.
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Updated: Wednesday, 2012 November 21 11:04:10 CST automatically from input from Stephanie A Schuler