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

AuthorsAaltonen, T.; Casal, Bruno ; Cuevas, Javier ; Gómez, G. ; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Menzemer, Stephanie; Palencia, Enrique ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío
KeywordsLikelihood Method
Missing Momentum
Pair Production
[PACS] Top quarks
[PACS] Quark and lepton masses and mixing in electroweak interactions
[PACS] Hadron-induced inclusive production with identified leptons, photons, or other nonhadronic particles (energy > 10 GeV)
Issue Date31-Oct-2007
PublisherAmerican Physical Society
CitationPhysical Review Letters 99: 182002 (2007)
AbstractWe 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 -> lvbq(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.
Description7 pages, 3 figures.-- PACS nrs.: 14.65.Ha, 12.15.Ff, 13.85.Qk.-- ISI Article Identifier :000250644000015.-- ArXiv pre-print available: http://arxiv.org/pdf/hep-ex/0703045.-- CDF Collaboration: et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.99.182002
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(IFIC) Artículos
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