Towards NNLL resummation: hard matching coefficients for squark and gluino hadroproduction

TL;DR

This paper calculates the hard matching coefficients for squark and gluino production at hadron colliders, enabling more precise threshold resummation at NNLL accuracy, with significant effects especially for gluino-involving final states.

Contribution

It provides the analytical expressions for the hard matching coefficients at NLO near threshold, a key step for NNLL resummation in supersymmetric particle production.

Findings

Hard matching coefficients significantly affect cross section predictions.

Largest impact observed for gluino-involving final states.

Numerical results demonstrate the importance of these corrections.

Abstract

We present the hard matching coefficients for squark and gluino hadroproduction. The hard matching coefficients follow from the next-to-leading order cross section near threshold and are an important ingredient for performing threshold resummation at next-to-next-to-leading logarithmic accuracy. We discuss the calculation, list the analytical results and study the numerical impact of these corrections. We find that the impact of the hard matching coefficients can be considerable, with the largest effect observed for final states involving gluinos.