Top Quark Anomalous Electromagnetic Couplings in Photon-Photon Scattering at the LHC

TL;DR

This paper investigates the potential of the LHC to measure the top quark's electromagnetic dipole moments via photon-photon scattering, providing improved bounds through analytical and numerical analysis.

Contribution

It introduces a novel approach using photon-photon scattering at the LHC to constrain top quark electromagnetic couplings, with detailed calculations and sensitivity analysis.

Findings

Enhanced bounds on top quark electromagnetic dipole moments.

Analytical and numerical methods applied to photon-photon scattering.

Potential for improved measurements at the LHC.

Abstract

The capability of the LHC to study the electromagnetic dipole moments of the top quark is discussed. In particular, the process $pp\to p\gamma\gamma p\to pt\bar{t}p$, which is supposed to be tagged by the forward/backward detectors at the LHC experiments, is used to explore the top quark electric and magnetic moments. We perform analytical calculations and then a numerical analysis on the sensitivity of the total cross section of the top quark pair production in $\gamma\gamma$ scattering at the LHC to the anomalous top quark couplings with photon. It is shown that improvements in the bounds on the electromagnetic dipole moments of the top quark can be achieved in this channel in comparison with the constraints from the former studies.