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We measure the top quark mass in dilepton final states of top-antitop eventsin proton-antiproton collisions at sqrt(s) = 1.96 TeV, using data correspondingto an integrated luminosity of 9.7 fb^-1 at the Fermilab Tevatron Collider. Theanalysis features a comprehensive optimization of the neutrino weighting methodto minimize the statistical uncertainties. We also improve the calibration ofjet energies using the calibration determined in top-antitop to lepton+jetsevents, which reduces the otherwise limiting systematic uncertainty from thejet energy scale. The measured top quark mass is mt = 173.32 +/- 1.36(stat) +/-0.85(syst) GeV.

Precise measurement of the top quark mass in dilepton decays using optimized neutrino weighting