Precision Top-Quark Mass Measurement in the Lepton+Jets Topology in pp¯ Collisions at s=1.96TeV

A. Abulencia et al. (CDF Collaboration)
Phys. Rev. Lett. 96, 022004 – Published 19 January 2006

Abstract

We report two measurements of the top-quark mass Mtop using the CDF II detector at the Fermilab Tevatron in a 318pb1 data sample of tt¯ events in the lepton+jets final state. One method uses an event-based likelihood technique resulting in Mtop=173.22.4+2.6(stat)±3.2(syst)GeV/c2 or 173.24.0+4.1GeV/c2. The second method reconstructs a top-quark mass in each event using the measured invariant mass of the hadronically decaying W boson to constrain the jet energy scale to obtain a value for Mtop of 173.53.6+3.7(stat)±1.3(syst)GeV/c2 or 173.53.8+3.9GeV/c2. We take the latter, which is more precise, as our result.

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  • Received 18 October 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.022004

©2006 American Physical Society

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Vol. 96, Iss. 2 — 20 January 2006

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