NNLL soft and Coulomb resummation for squark and gluino production at the LHC

TL;DR

This paper provides advanced theoretical predictions for squark and gluino pair production cross sections at the LHC, incorporating NNLL resummation of soft and Coulomb effects to improve accuracy and reduce uncertainties.

Contribution

It introduces a comprehensive NNLL resummation framework for squark and gluino production, including all relevant threshold-enhanced terms and corrections.

Findings

NNLL corrections increase cross sections by up to 90%.

Theoretical uncertainties are reduced to about 10%.

Results are publicly available as grid files.

Abstract

We present predictions for the total cross sections for pair production of squarks and gluinos at the LHC including a combined NNLL resummation of soft and Coulomb gluon effects. We derive all terms in the NNLO cross section that are enhanced near the production threshold, which include contributions from spin-dependent potentials and so-called annihilation corrections. The NNLL corrections at $\sqrt{s}=13$ TeV range from up to $20\%$ for squark-squark production to $90\%$ for gluino pair production relative to the NLO results and reduce the theoretical uncertainties of the perturbative calculation to the $10\%$ level. Grid files with our numerical results are publicly available.