NLO QCD corrections and off-shell effects for $t\bar{t}H$ production in the Higgs characterisation model

TL;DR

This paper analyzes the impact of next-to-leading order QCD corrections and off-shell effects on top-antitop Higgs production at the LHC within the Higgs characterisation framework, emphasizing the significance of single-resonant contributions especially for CP-odd Higgs bosons.

Contribution

It provides a detailed study of off-shell effects and higher-order QCD corrections in $t\bar{t}H$ production, highlighting their importance for accurate Higgs characterization.

Findings

Off-shell effects significantly influence $t\bar{t}H$ production predictions.

Higher-order QCD corrections are crucial for precise cross-section calculations.

Single-resonant contributions are essential for understanding CP-odd Higgs production.

Abstract

In these proceedings we discuss $t\bar{t}H$ production at the Large Hadron Collider in the Higgs characterisation model. We demonstrate the importance of off-shell effects and higher-order QCD corrections for this process and highlight the importance of single-resonant contributions for the production of a $\mathcal{CP}$-odd Higgs boson.