Associated Production of Higgs Boson and $t\bar t$ at LHC

TL;DR

This paper explores the associated production of Higgs bosons with top quark pairs at the LHC to better understand Higgs properties and Yukawa interactions, especially considering complex scalar and pseudoscalar sectors in new physics models.

Contribution

It investigates top quark spin correlation observables to probe the $t\bar t H$ interaction and Higgs properties in the context of extended scalar sectors.

Findings

Top quark spin correlations can reveal the nature of the $t\bar t H$ interaction.

The study provides insights into distinguishing scalar and pseudoscalar Higgs contributions.

Results suggest potential for new physics discovery at the LHC.

Abstract

One of the future goals of the LHC is to precisely measure the properties of Higgs boson. The associated production of Higgs boson and the top quark pair is a promising process to investigate the related Yukawa interaction and the properties of Higgs. Compared with the pure scalar sector in the Standard Model, the Higgs sector contains both scalar and pseudoscalar in many new physics models, which makes the $t\bar t H$ interaction more complex and provides a variety of phenomena. To investigate the $t\bar t H$ interaction and the properties of Higgs, we study the top quark spin correlation observables at the LHC.