Search for anomalous top-gluon couplings at LHC revisited

Details Search for anomalous top-gluon couplings at LHC revisited Search for anomalous top-gluon couplings at LHC revisited

2009-10-16

arxiv.org/abs/0910.3049v2

Eur.Phys.J.C65:127-135,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

One comment and related two refs. added. Final version (to appear in Eur.Phys.J. C)

Scientific paper

10.1140/epjc/s10052-009-1204-y

Through top-quark pair productions at LHC, we study possible effects of nonstandard top-gluon couplings yielded by SU(3)xSU(2)xU(1) invariant dimension-6 effective operators. We calculate the total cross section and also some distributions for p p -> t tbar X as functions of two anomalous-coupling parameters, i.e., the chromoelectric and chromomagnetic moments of the top, which are constrained by the total cross section sigma(p pbar -> t tbar X) measured at Tevatron. We find that LHC might give us some chances to observe sizable effects induced by those new couplings.

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