Dimension-six anomalous $tq\gamma$ couplings in $\gamma \gamma$ collision at the LHC

TL;DR

This paper explores how dimension-six anomalous $tq\gamma$ couplings affect top quark production and decay in photon-photon collisions at the LHC, providing sensitivity bounds and analyzing spin asymmetries.

Contribution

It offers new sensitivity bounds on anomalous $tq\gamma$ couplings at the LHC considering top decay effects and different detector acceptances.

Findings

Established 95% confidence level bounds on anomalous couplings.

Analyzed the impact of anomalous couplings on single top quark spin asymmetry.

Quantified the $t o q\gamma$ branching ratio limits.

Abstract

We have investigated the flavor changing top quark physics on the dimension-six anomalous $tq\gamma$ ($q=u,c$) couplings through the process $pp\to p\gamma \gamma p\to p t\bar{q}p$ at the LHC by considering different forward detector acceptances. In this paper, we have taken into account and examine the effects of top quark decay. The sensitivity bounds on the anomalous couplings and, $t\to q\gamma$ branching ratio have been obtained at the $95\%$ confidence level for the effective lagrangian approach. Besides, we have investigated the effect of the anomalous couplings on single top quark spin asymmetry.