Bound-state effects on gluino-pair production at hadron colliders

TL;DR

The paper addresses bound-state effects on gluino-pair production at hadron colliders within the MSSM. It extends threshold resummation by incorporating gluinonium formation through nonperturbative Green's-function methods, including finite-width effects. The key finding is that bound-state corrections significantly distort the gluino-pair invariant-mass distribution near threshold and alter the total cross section, with the magnitude and observability strongly dependent on $\Gamma_{\tilde g}$. This work enhances the understanding of heavy colored sparticle production at the LHC and informs search strategies by highlighting regions where bound-state effects are most pronounced.

Abstract

We study bound-state effects on the pair production of gluinos at hadron colliders, in a context of the minimal supersymmetric extension of the standard model. Due to the expected large mass and the octet color-charge of gluinos, the bound-state effects can be substantial at the LHC. We find significant deformation of the invariant-mass distributions of a gluino-pair near the mass threshold, as well as an additional correction to the total cross-section. Both the invariant-mass distribution and the correction to the total cross section depend crucially on the decay width of the gluino.