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Open Access item Measurement of the top-quark mass in all-hadronic decays in p(p)over-bar collisions at CDF II

Authors:Aaltonen, T.
Cuevas, Javier
Gómez, G.
Gómez-Ceballos, Guillelmo
Menzemer, Stephanie
Palencia, Enrique
Rodrigo, Teresa
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vila, Iván
Vilar, Rocío
Keywords:[PACS] Top quarks, [PACS] Quark and lepton masses and mixing in electroweak interactions
Issue Date:3-Apr-2007
Publisher:American Physical Society
Citation:Physical Review Letters 98: 142001 (2007)
Abstract:We present a measurement of the top-quark mass M-top in the all-hadronic decay channel t(t)over bar -> W(+)bW(-)(b)over bar -> q(1)(q)over bar(2)bq(3)(q)over bar(4)(b)over bar. The analysis is performed using 310 pb^(-1) of root(s) = 1.96 TeV p(p)over bar collisions collected with the CDF II detector using a multijet trigger. The mass measurement is based on an event-by-event likelihood which depends on both the sample purity and the value of the top-quark mass, using 90 possible jet-to-parton assignments in the six-jet final state. The joint likelihood of 290 selected events yields a value of M-top = 177.1 ± 4.9(stat) ± 4.7(syst) GeV/c^(2).
Description:7 pages, 2 figures.-- PACS nrs.: 14.65.Ha, 12.15.Ff.-- ISI Article Id: 000245512100018.-- ArXiv pre-print available at: http://arxiv.org/pdf/hep-ex/0612026. CDF Collaboration: et al.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevLett.98.142001
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