Differential distributions for top-quark hadro-production with a running mass

TL;DR

This paper investigates how using the MSbar running mass scheme affects differential distributions in top-quark production, showing improved convergence and scale dependence at NLO and NNLO.

Contribution

It demonstrates the impact of the MSbar scheme on differential distributions and updates total cross section analysis with full NNLO calculations.

Findings

Faster perturbative convergence with MSbar mass scheme

Improved scale dependence in differential distributions

Updated total cross section with full NNLO results

Abstract

We take a look at how the differential distributions for top-quark production are affected by changing to the running mass scheme. Specifically we consider the transverse momentum, rapidity and pair-invariant mass distributions at NLO for the top-quark mass in the MSbar scheme. It is found that, similar to the total cross section, the perturbative expansion converges faster and the scale dependence improves using the mass in the MSbar scheme as opposed to the on-shell scheme. We also update the analysis for the total cross section using the now available full NNLO contribution.