The anomalous top quark coupling tqg and tW production at the LHC

Details The anomalous top quark coupling tqg and tW production at the LHC The anomalous top quark coupling tqg and tW production at the LHC

2011-05-26

arxiv.org/abs/1105.5227v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Typos corrected, a few discussions added

Scientific paper

Many new physics models beyond the standard model ($SM$) can give rise to the large anomalous top couplings $tqg$ ($q=u$ and $c$). We focus our attention on these couplings induced by the topcolor-assisted technicolor ($TC2$) model and the littlest Higgs model with $T$-parity (called $LHT $ model), and consider their contributions to the production cross section and the charge asymmetry for $tW$ production at the $LHC$. We find that the anomalous top coupling $tqg$ induced by these two kinds of new physics models can indeed generate sizable charge asymmetry. The correction effects of the $LHT $ model on the production cross sections of the processes $pp\rightarrow tW^-+X$ and $pp\rightarrow \bar{t}W^++X$ are significant large, which might be detected at the $LHC$.

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