# Associated $t \bar{t} H$ production at the LHC: theoretical predictions at NLO+NNLL accuracy

## TL;DR

This paper enhances the theoretical predictions for associated top-antitop-Higgs production at the LHC by applying NNLL resummation, resulting in more stable and precise cross section estimates.

## Contribution

It introduces a NNLL resummation approach for $pp o t\bar{t}H$ at the LHC, improving the accuracy and stability of theoretical predictions.

## Key findings

- Resummation stabilizes cross section predictions.
- Theoretical uncertainties are significantly reduced.
- Predictions are more reliable for experimental comparisons.

## Abstract

We perform threshold resummation of soft gluon corrections to the total cross section and the invariant mass distribution for the process $pp \to t\bar{t}H$. The resummation is carried out at next-to-next-to-leading-logarithmic (NNLL) accuracy using the direct QCD Mellin space technique in the three-particle invariant mass kinematics. After presenting analytical expressions we discuss the impact of resummation on the numerical predictions for the associated Higgs boson production with top quarks at the LHC. We find that NLO+NNLL resummation leads to predictions for which the central values are remarkably stable with respect to scale variation and for which theoretical uncertainties are reduced in comparison to NLO predictions.