Determining the CP properties of the Higgs boson

TL;DR

This paper proposes a method to determine the CP properties of the Higgs boson by measuring total cross sections and top polarization in e+e- collisions, aiding future collider experiments.

Contribution

It introduces a straightforward approach to unambiguously assess the Higgs boson's CP quantum numbers using specific measurable quantities.

Findings

CP properties can be determined from total cross section measurements.

Top polarization provides additional sensitivity to CP nature.

Method is applicable to future high-energy collider experiments.

Abstract

The search and the probe of the fundamental properties of Higgs boson(s) and, in particular, the determination of their charge conjugation and parity (CP) quantum numbers, is one of the main tasks of future high-energy colliders. We demonstrate that the CP properties of a Standard Model-like Higgs particle can be unambiguously assessed by measuring just the total cross section and the top polarization in associated Higgs production with top quark pairs in e+e- collisions.