# Probing the anomalous electromagnetic dipole moments of the top quark in $\gamma p$ collision at the LHC, the HL-LHC and the HE-LHC

## TL;DR

This paper investigates the potential of photon-proton collisions at the LHC, HL-LHC, and HE-LHC to measure the top quark's electromagnetic dipole moments, providing new sensitivity limits for these fundamental properties.

## Contribution

It introduces a novel analysis of top quark dipole moments via photon-proton interactions at future colliders, with detailed sensitivity estimates and systematic uncertainty considerations.

## Key findings

- Best limits on anomalous couplings: |a_A|=0.0200, a_V=[-0.9959; 0.0003]
- Photon-proton collisions offer promising sensitivity for top quark dipole moments
- Systematic uncertainties of 0.3% and 5% analyzed for impact on results

## Abstract

The determination of the electromagnetic dipole moments of the top quark is one of the most important goals of the top quark physics program in the collider experiments. For this reason, the top quark pair production to investigate the sensitivity on the electric and magnetic dipole moments of the top quark via the process $pp\rightarrow p \gamma p \rightarrow p t \bar{t} X$ at the Large Hadron Collider (LHC), the High-Luminosity Large Hadron Collider (HL-LHC) and High-Energy Large Hadron Collider (HE-LHC) is discussed. We apply pure leptonic and semileptonic decays for top quark pair production in the final state. Moreover, we consider systematic uncertainties of $0,3\%$ and $5\%$. The best limits obtained from the process $pp\rightarrow p \gamma p \rightarrow p t \bar{t} X$ on the anomalous $a_{A}$ and $a_{V}$ couplings are $|a_{A}|=0.0200$ and $a_{V}=[-0.9959; 0.0003]$. Thus, our results indicate that the process $pp\rightarrow p \gamma p \rightarrow p t \bar{t} X$ is a very good perspective to probe the electric and magnetic dipole moments of the top quark at the HL-LHC and the HE-LHC.