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 (t (t) over bar -> W(+)bW(-)(b) over bar -> l nu bq (q) over bar (')(b) over bar). The top-quark mass is extracted using a direct calculation of the probability density that each event corresponds to the t (t) over bar 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/c(2). RI Levy, Stephen/C-3493-2011; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; St.Denis, Richard/C-8997-2012; Prokoshin, Fedor/E-2795-2012; Azzi, Patrizia/H-5404-2012

Precise measurement of the top-quark mass in the Lepton plus Jets topology at CDF II

MANCA, GIULIA;OLDEMAN, RUDOLF GERHARD CHRISTIAAN;
2007-01-01

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 (t (t) over bar -> W(+)bW(-)(b) over bar -> l nu bq (q) over bar (')(b) over bar). The top-quark mass is extracted using a direct calculation of the probability density that each event corresponds to the t (t) over bar 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/c(2). RI Levy, Stephen/C-3493-2011; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; St.Denis, Richard/C-8997-2012; Prokoshin, Fedor/E-2795-2012; Azzi, Patrizia/H-5404-2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/46501
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