Electroweak corrections to top quark pair production in association with a hard photon at hadron colliders

TL;DR

This paper calculates the next-to-leading order electroweak corrections to top quark pair production with a photon at hadron colliders, highlighting their importance at high energies due to the EW Sudakov effect.

Contribution

It provides the first detailed NLO electroweak correction analysis for top pair plus photon production at hadron colliders, including distributions and dependence on photon transverse momentum cuts.

Findings

NLO EW corrections are significant at high energies.

Distributions of top quark and photon transverse momentum are affected.

Electroweak Sudakov effects dominate in high energy regions.

Abstract

We present the next-to-leading order (NLO) electroweak (EW) corrections to the top quark pair production associated with a hard photon at the current and future hadron colliders. The dependence of the leading order (LO) and NLO EW corrected cross sections on the photon transverse momentum cut are investigated. We also provide the LO and NLO EW corrected distributions of the transverse momentum of final top quark and photon and the invariant mass of top quark pair and top-antitop-photon system. The results show that the NLO EW corrections are significant in high energy regions due to the EW Sudakov effect.