Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-

TL;DR

This paper calculates two-loop soft anomalous dimensions for single top quark production with W or H- bosons, enabling precise NNLL resummation and approximate NNLO cross section predictions at LHC energies.

Contribution

It provides the first calculation of two-loop soft anomalous dimensions for these processes, enhancing theoretical accuracy for top quark production predictions.

Findings

Derived approximate NNLO cross sections for bg -> tW- and bg -> tH-

Enabled NNLL soft-gluon resummation for these processes

Improved theoretical precision at LHC energies

Abstract

I present results for the two-loop soft anomalous dimensions for associated production of a single top quark with a W boson or a charged Higgs boson. The calculation uses expressions for the massive cusp anomalous dimension, which are presented in different forms, and it allows soft-gluon resummation at next-to-next-to-leading-logarithm (NNLL) accuracy. From the NNLL resummed cross section I derive approximate NNLO cross sections for bg -> tW- and bg -> tH- at LHC energies of 7, 10, and 14 TeV.