Associated production of a top pair and a W boson at next-to-next-to-leading logarithmic accuracy

TL;DR

This paper develops a high-precision theoretical framework for predicting the production of a top-antitop pair with a W boson at the LHC, incorporating advanced soft-gluon resummation techniques up to NNLL accuracy.

Contribution

It introduces a next-to-next-to-leading logarithmic resummation formula for this process and implements it in a Monte Carlo code for detailed predictions.

Findings

Resummation improves the accuracy of cross section predictions.

Soft-gluon effects significantly impact differential distributions.

Comparison shows resummation results differ from fixed-order calculations.

Abstract

We consider soft gluon emission corrections to the production of a top-antitop pair in association with a W boson at the Large Hadron Collider. We obtain a soft-gluon resummation formula for this production process which is valid up to next-to-next-to-leading logarithmic accuracy. We evaluate the soft gluon resummation formula in Mellin space by means of an in-house parton level Monte Carlo code which allows us to obtain predictions for the total cross section as well as for several differential distributions. We study the impact of the soft-gluon resummation corrections in comparison to fixed order calculations.