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Precise Measurement of the Top-Quark Mass in the Lepton + Jets Topology at CDF II

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Hamilton, Andrew / Lefevre, Régis / Moed, Shulamit / Sfyrla, Anna / Shreyber, Irina / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2007, vol. 99, no. 18, p. 182002
Abstract We present a measurement of the mass of the top quark from proton-antiproton collisions recorded at the CDF experiment in Run II of the Fermilab Tevatron. We analyze events from the single lepton plus jets final state (tt→W+bW−b→lνbqq′b). The top-quark mass is extracted using a direct calculation of the probability density that each event corresponds to the tt final state. The probability is a function of both the mass of the top quark and the energy scale of the calorimeter jets, which is constrained in situ by the hadronic W boson mass. Using 167 events observed in 955  pb−1 of integrated luminosity, we achieve the single most precise measurement of the top-quark mass, 170.8±2.2(stat.)±1.4(syst.)  GeV/c2.
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CDF COLLABORATION. Precise Measurement of the Top-Quark Mass in the Lepton + Jets Topology at CDF II. In: Physical Review Letters, 2007, vol. 99, n° 18, p. 182002. doi: 10.1103/PhysRevLett.99.182002 https://archive-ouverte.unige.ch/unige:38434

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Deposited on : 2014-07-03

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