Search for a Vectorlike Quark with Charge 2/3 in t plus Z Events from pp Collisions at root s 7 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
30/09/2013
20/05/2014
30/09/2013
20/05/2014
29/12/2011
|
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) A search for pair-produced heavy vectorlike charge-2/3 quarks, T, in pp collisions at a center-of-mass energy of 7 TeV, is performed with the CMS detector at the LHC. Events consistent with the flavor-changing-neutral-current decay of a T quark to a top quark and a Z boson are selected by requiring two leptons from the Z-boson decay, as well as an additional isolated charged lepton. In a data sample corresponding to an integrated luminosity of 1.14 fb(-1), the number of observed events is found to be consistent with the standard model background prediction. Assuming a branching fraction of 100% for the decay T -> tZ, a T quark with a mass less than 475 GeV/c(2) is excluded at the 95% confidence level. |
Formato |
15 |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.107.271802 Physical Review Letters. College Pk: Amer Physical Soc, v. 107, n. 27, p. 15, 2011. 0031-9007 http://hdl.handle.net/11449/24608 10.1103/PhysRevLett.107.271802 WOS:000298611000010 WOS000298611000010.pdf |
Idioma(s) |
eng |
Publicador |
Amer Physical Soc |
Relação |
Physical Review Letters |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |