Stop-antistop and sbottom-antisbottom production at LHC: a one-loop search for model parameters dependence

TL;DR

This paper calculates one-loop electroweak production of stop-antistop and sbottom-antisbottom pairs at the LHC, exploring how these processes depend on supersymmetric parameters beyond squark masses.

Contribution

It provides the first detailed one-loop electroweak calculations for these production processes and analyzes their dependence on MSSM parameters at specific benchmark points.

Findings

One-loop effects can show a mild, percent-level dependence on SUSY parameters.

The dependence is not straightforwardly detectable experimentally.

Results are based on twelve MSSM benchmark scenarios.

Abstract

We have computed the one-loop electroweak expression of diagonal and non diagonal stop-antistop and sbottom-antisbottom production from initial state gluons at LHC. We have investigated the possibility that the one-loop effects exhibit a dependence on "extra" supersymmetric parameters different from the final squark masses. Our results, given for a choice of twelve SUSY benchmark points in the MSSM with mSUGRA symmetry breaking, show that in some cases a mild dependence might arise, at the percent relative level, of not simple experimental detection.