NNLL resummation for squark-antisquark production

TL;DR

This paper presents NNLL resummation of soft-gluon emissions for squark-antisquark production, significantly improving cross section predictions and reducing theoretical uncertainties at the LHC.

Contribution

It introduces the calculation of one-loop hard matching coefficients for NNLL resummation in squark-antisquark production, enhancing prediction accuracy.

Findings

Reduced scale uncertainty in cross section calculations

Cross section increases by up to 30% at 1.5 TeV squark mass

Significant improvement over NLO predictions

Abstract

We report on the resummation of soft-gluon emissions for squark-antisquark production at next-to-next-to-leading-logarithmic (NNLL) accuracy. We will put particular emphasis on the one loop hard matching coefficients required to perform the resummation. Furthermore we will discuss the numerical effect of the different ingredients in the corrections. We find a significant reduction in the scale uncertainty and a considerable increase in the prediction of the total cross section at the central scale. Compared to the next-to-leading order prediction, the corrections increase the cross section by up to 30% for 1.5 TeV squarks at a centre-of-mass energy of 7 TeV at the LHC.