Determination of the top-quark pole mass and strong coupling constant from the t(t)over-bar production cross section in pp collisions at root s=7 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
03/12/2014
03/12/2014
20/01/2014
|
Resumo |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The inclusive cross section for top-quark pair production measured by the CMS experiment in protonproton collisions at a center-of-mass energy of 7 TeV is compared to the QCD prediction at next-to-next-to-leading order with various parton distribution functions to determine the top-quark pole mass, m(t)(pole), or the strong coupling constant, alpha(S). With the parton distribution function set NNPDF2.3, a pole mass of 176.7(-3.4)(+3.8) GeV is obtained when constraining alpha(S) at the scale of the Z boson mass, m(Z), to the current world average. Alternatively, by constraining m(t)(pole) to the latest average from direct mass measurements, a value of alpha(S)(m(Z)) = 0.1151(-0.0032)(+0.0033) is extracted. This is the first determination of alpha(S) using events from top-quark production. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved. |
Formato |
496-517 |
Identificador |
http://dx.doi.org/10.1016/j.physletb.2013.12.009 Physics Letters B. Amsterdam: Elsevier Science Bv, v. 728, p. 496-517, 2014. 0370-2693 http://hdl.handle.net/11449/111335 10.1016/j.physletb.2013.12.009 WOS:000330556000078 WOS000330556000078.pdf |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
Physics Letters B |
Direitos |
openAccess |
Palavras-Chave | #CMS #Physics #Top #Quark #Pair #Cross section #Mass #QCD #Strong #Coupling #Constant |
Tipo |
info:eu-repo/semantics/article |