Higher-order soft corrections to squark hadro-production

TL;DR

This paper provides advanced theoretical predictions for squark pair-production cross sections at colliders, incorporating next-to-next-to-leading order soft corrections, Coulomb effects, and scale dependence to improve experimental exclusion limits.

Contribution

It introduces the first comprehensive NNLO soft correction calculations for squark production, enhancing the precision of cross section predictions in supersymmetry searches.

Findings

Increased total cross section at NNLO improves exclusion limits.

Exact threshold logarithms and Coulomb corrections included.

Reduced theoretical uncertainties in squark production predictions.

Abstract

We present new predictions for the total cross section of squark pair-production at Tevatron and LHC through next-to-next-to-leading order within the Minimal Supersymmetric Standard Model. The results are based on the numerically dominant soft corrections. They are exact in all logarithmically enhanced terms near threshold, include the Coulomb corrections at two loops and exact scale dependence. We translate the increased total cross section at next-to-next-to-leading order into improved exclusion limits for squark masses and we investigate the scale dependence as well as the sensitivity on the parton luminosity.