Soft gluon resummation for associated gluino-gaugino production at the LHC

TL;DR

This paper performs a next-to-leading logarithmic resummation for gluino-gaugino production at the LHC, improving theoretical predictions and reducing uncertainties in cross section calculations.

Contribution

It provides the first threshold resummation at NLL accuracy for this process, including generalization to non-universal squark masses.

Findings

NLL contributions increase cross sections by 7-20%.

Scale dependence is reduced from ±12% to below ±3%.

Results enhance precision of supersymmetric particle production predictions.

Abstract

We perform a threshold resummation calculation for the associated production of gluinos and gauginos at the LHC to the next-to-leading logarithmic accuracy. Analytical results are presented for the process-dependent soft anomalous dimension and the hard function. The resummed results are matched to a full next-to-leading order calculation, for which we have generalised the previously known results to the case of supersymmetric scenarios featuring non-universal squark masses. Numerically, the next-to-leading logarithmic contributions increase the total next-to-leading order cross section by 7 to 20% for central scale choices and gluino masses of 3 to 6 TeV, respectively, and reduce its scale dependence typically from up to $\pm12$% to below $\pm3$%.