NNLL resummation for the associated production of a top pair and a Higgs boson at the LHC

TL;DR

This paper develops a NNLL resummation method for top-antitop-Higgs production at the LHC, showing it increases cross sections and distributions compared to NLO predictions.

Contribution

It introduces a specialized Monte Carlo tool for NNLL resummation of soft gluon corrections in top-antitop-Higgs production at the LHC.

Findings

Resummation increases total cross section.

Differential distributions are enhanced.

NNLL corrections are significant over NLO.

Abstract

We study the resummation of soft gluon emission corrections to the production of a top-antitop pair in association with a Higgs boson at the Large Hadron Collider. Starting from a soft-gluon resummation formula derived in previous work, we develop a bespoke parton-level Monte Carlo program which can be used to calculate the total cross section along with differential distributions. We use this tool to study the phenomenological impact of the resummation to next-to-next-to-leading logarithmic (NNLL) accuracy, finding that these corrections increase the total cross section and the differential distributions with respect to NLO calculations of the same observables.