EW NLO corrections to pair production of top-squarks at the LHC

TL;DR

This paper calculates complete electroweak corrections at next-to-leading order for top-squark pair production at the LHC within the MSSM, including interference effects and photon-induced channels, analyzing parameter impacts.

Contribution

It provides the first comprehensive NLO electroweak correction calculation for top-squark pair production, including interference and photon-induced processes in the MSSM.

Findings

Electroweak corrections significantly affect production rates.

Photon-induced channels contribute notably at NLO.

MSSM parameters influence the size of EW corrections.

Abstract

Presented are complete electroweak (EW) corrections at ${\cal O}(\alpha\alpha_{\mathrm s}^{\mathrm 2})$ to top-squark pair production at the Large Hadron Collider (LHC) within the framework of the Minimal Supersymmetric Standard Model (MSSM). At this order, effects from the interference of EW and QCD contributions have to be taken into account. Also photon-induced top-squark production is considered as additionnal partonic channel which arises from the non-zero photon density in the proton. Furthermore, the impact of MSSM parameters on the EW corrections is analyzed.