Search for production of single top quarks via tcg and tug flavor-changing-neutral-current couplings
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
09/11/2007
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Resumo |
We search for the production of single top quarks via flavor-changing-neutral-current couplings of a gluon to the top quark and a charm (c) or up (u) quark. We analyze 230 pb(-1) of lepton+jets data from p (p) over tilde collisions at a center of mass energy of 1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider. We observe no significant deviation from standard model predictions, and hence set upper limits on the anomalous coupling parameters kappa(c)(g)/Lambda and kappa(u)(g)/Lambda, where kappa(g) define the strength of tcg and tug couplings, and Lambda defines the scale of new physics. The limits at 95% C.L. are kappa(c)(g)/Lambda < 0.15 TeV-1 and kappa(u)(g)/Lambda < 0.037 TeV-1. |
Formato |
8 |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.99.191802 Physical Review Letters. College Pk: Amer Physical Soc, v. 99, n. 19, 8 p., 2007. 0031-9007 http://hdl.handle.net/11449/23102 10.1103/PhysRevLett.99.191802 WOS:000250810500016 WOS000250810500016.pdf |
Idioma(s) |
eng |
Publicador |
Amer Physical Soc |
Relação |
Physical Review Letters |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |