Effects of the supersymmetric phases on the neutral Higgs sector

TL;DR

This paper investigates how supersymmetric CP-violating phases influence the Higgs sector in the MSSM, revealing that the lightest Higgs remains mostly CP-even while other scalars are heavy and their decay rates are significantly affected.

Contribution

It introduces a calculation of radiative corrections to the MSSM Higgs potential considering CP-violating phases, highlighting their impact on Higgs properties and decay rates.

Findings

Lightest Higgs remains essentially CP-even.

Other scalars are heavy and lack definite CP properties.

Decay rates to fermion pairs are significantly modified.

Abstract

By using the effective potential approximation and taking into account the dominant top quark and scalar top quark loops, radiative corrections to MSSM Higgs potential are computed in the presence of the supersymmetric CP-violating phases. It is found that, the lightest Higgs scalar remains essentially CP-even as in the CP-invariant theory whereas the other two scalars are heavy and do not have definite CP properties. The supersymmetric CP-violating phases are shown to modify significantly the decay rates of the scalars to fermion pairs.