Next-to-next-to-leading-order collinear and soft gluon corrections for t-channel single top quark production

TL;DR

This paper develops a precise theoretical framework for calculating single top quark production in the t channel, incorporating advanced gluon correction resummation at NNLL accuracy, and provides approximate NNLO cross sections with detailed numerical analysis.

Contribution

It introduces a NNLL resummation method using two-loop soft anomalous dimensions to improve the accuracy of single top quark production cross section calculations.

Findings

Approximate NNLO cross sections for t-channel single top production.

Numerical results including top mass dependence and uncertainties.

Combined results for all single top production channels.

Abstract

I present the resummation of collinear and soft gluon corrections to single top quark production in the t channel at next-to-next-to-leading logarithm (NNLL) accuracy using two-loop soft anomalous dimensions. The expansion of the resummed cross section yields approximate next-to-next-to-leading order (NNLO) cross sections. Numerical results for t-channel single top quark (or single antitop) production at the Tevatron and the LHC are presented, including the dependence of the cross sections on the top quark mass, and the uncertainties from scale variation and parton distributions. Combined results for all single top quark production channels are also given.