Search for same-sign top-quark pair production at root s=7 TeV and limits on flavour changing neutral currents in the top sector
| Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
|---|---|
| Data(s) |
30/09/2013
20/05/2014
30/09/2013
20/05/2014
01/08/2011
|
| 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) An inclusive search for same-sign top-quark pair production in pp collisions at root s = 7 TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 pb(-1). This analysis is motivated by recent studies of p (p) over bar -> t (t) over bar reporting mass-dependent forward-backward asymmetries larger than expected from the standard model. These asymmetries could be due to Flavor Changing Neutral Currents (FCNC) in the top sector induced by t -channel exchange of a massive neutral vector boson (Z'). Models with such a Z' also predict enhancement of same-sign top-pair production in pp or pp collisions. Limits are set as a function of the Z' mass and its couplings to u and t quarks. These limits disfavour the FCNC interpretation of the Tevatron results. |
| Formato |
27 |
| Identificador |
http://dx.doi.org/10.1007/JHEP08(2011)005 Journal of High Energy Physics. New York: Springer, n. 8, p. 27, 2011. 1126-6708 http://hdl.handle.net/11449/24735 10.1007/JHEP08(2011)005 WOS:000294901400077 WOS000294901400077.pdf |
| Idioma(s) |
eng |
| Publicador |
Springer |
| Relação |
Journal of High Energy Physics |
| Direitos |
openAccess |
| Palavras-Chave | #Hadron-Hadron Scattering |
| Tipo |
info:eu-repo/semantics/article |