Measurement of the top quark mass in final states with two leptons
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
30/09/2013
20/05/2014
30/09/2013
20/05/2014
01/11/2009
|
Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) We present measurements of the top quark mass (m(t)) in tt candidate events with two final state leptons using 1 fb(-1) of data collected by the D0 experiment. Our data sample is selected by requiring two fully identified leptons or by relaxing one lepton requirement to an isolated track if at least one jet is tagged as a b jet. The top quark mass is extracted after reconstructing the event kinematics under the tt hypothesis using two methods. In the first method, we integrate over expected neutrino rapidity distributions, and in the second we calculate a weight for the possible top quark masses based on the observed particle momenta and the known parton distribution functions. We analyze 83 candidate events in the data and obtain m(t)=176.2 +/- 4.8(stat)+/- 2.1(sys) GeV and m(t)=173.2 +/- 4.9(stat)+/- 2.0(sys) GeV for the two methods, respectively. Accounting for correlations between the two methods, we combine the measurements to obtain m(t)=174.7 +/- 4.4(stat)+/- 2.0(sys) GeV. |
Formato |
20 |
Identificador |
http://dx.doi.org/10.1103/PhysRevD.80.092006 Physical Review D. College Pk: Amer Physical Soc, v. 80, n. 9, p. 20, 2009. 1550-7998 http://hdl.handle.net/11449/24459 10.1103/PhysRevD.80.092006 WOS:000272313100012 WOS000272313100012.pdf |
Idioma(s) |
eng |
Publicador |
Amer Physical Soc |
Relação |
Physical Review D |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |