Gluino Pair Production at the LHC: The Threshold

TL;DR

This paper presents a next-to-leading order analysis of gluino pair production near threshold at the LHC, revealing significant enhancements due to non-relativistic QCD effects, especially for various colour states.

Contribution

It provides a detailed NLO calculation of gluino pair production near threshold, including all colour configurations and matching coefficients, highlighting the impact of non-relativistic effects.

Findings

Enhanced cross section near threshold due to non-relativistic effects

Significant impact of colour factors on the production rate

Numerical results for LHC energies at 14 TeV and 7 TeV

Abstract

The next-to-leading order analysis of the cross section of hadronic gluino pair production close to threshold is presented. Within the framework of non-relativistic QCD a significant enhancement compared to fixed order perturbation theory is observed which originates from the characteristic remnant of the 1S peak below the nominal pair threshold. This enhancement is similar to the corresponding one for top production. However, as a consequence of the larger colour factor of the QCD potential the effect is significantly enhanced. The analysis includes all colour configurations of S-wave gluino pairs, i.e. singlet, symmetric and antisymmetric octet, decuplet and twenty-seven representation. Matching coefficients involving real and virtual radiation are separately evaluated for all colour and spin configurations and initial states. We concentrate on the case of gluino decay rates comparable to the gluino binding energy. The non-relativistic dynamics of the gluino pair is solved by calculating the Green's function in NLO. Numerical results for the Large Hadron Collider at sqrt(s)=14 TeV and 7 TeV are presented for various characteristic scenarios.