Improving predictions for associated $t\bar{t}H$ production at the LHC: soft gluon resummation through NNLL accuracy

TL;DR

This paper improves predictions for the associated top-antitop-Higgs production at the LHC by applying NNLL soft gluon resummation, reducing theoretical uncertainties in the cross section calculations.

Contribution

It introduces a NNLL resummation technique for soft gluon corrections in $t\bar{t}H$ production, matched to NLO results, enhancing prediction accuracy.

Findings

Resummation reduces scale-variation uncertainty.

Matched NNLL and NLO results improve cross section predictions.

Enhanced theoretical precision for LHC Higgs studies.

Abstract

In the following we present our recent results on the resummation of soft gluon corrections to the $pp\rightarrow t\bar{t}H$ cross section at the LHC. The resummation was carried out at next-to-next-to-leading-logarithmic (NNLL) accuracy using the Mellin space technique. Obtained results were matched to the NLO cross section. We show that the resummation leads to reduction of scale-variation uncertainty of the total $pp\rightarrow t\bar{t}H$ cross section.