Soft-gluon resummation for squark and gluino hadroproduction

TL;DR

This paper develops a method for resumming soft gluon emissions at NLL accuracy to improve predictions for squark and gluino production in proton collisions, reducing uncertainties and increasing accuracy.

Contribution

It provides analytical NLL resummation results for squark and gluino production, enhancing the precision of theoretical predictions at colliders.

Findings

NLL corrections can increase cross sections by up to 35% at the LHC.

Soft-gluon resummation significantly reduces scale uncertainties.

Corrections are most substantial for gluino-involving processes.

Abstract

We consider the resummation of soft gluon emission for squark and gluino hadroproduction at next-to-leading-logarithmic (NLL) accuracy in the framework of the minimal supersymmetric standard model. We present analytical results for squark-squark and squark-gluino production and provide numerical predictions for all squark and gluino pair-production processes at the Tevatron and at the LHC. The size of the soft-gluon corrections and the reduction in the scale uncertainty are most significant for processes involving gluino production. At the LHC, where the sensitivity to squark and gluino masses ranges up to 3 TeV, the corrections due to NLL resummation over and above the NLO predictions can be as high as 35% in the case of gluino-pair production, whereas at the Tevatron, the NLL corrections are close to 40% for squark-gluino final states with sparticle masses around 500 GeV.