Additional phases induced by the supersymmetric CP phases

TL;DR

This paper explores how supersymmetric CP phases in the MSSM induce additional phases that can significantly enhance CP violation, especially near CP-conserving points, with implications for chargino-related phenomena.

Contribution

It demonstrates that explicit CP violation in the MSSM can generate substantial additional phases, affecting CP violation levels beyond previous understandings.

Findings

Additional phases can be as large as original CP phases in certain MSSM regions.

CP violation is notably increased near CP-conserving points due to these phases.

The presence of these phases leads to greater CP violation than when they are absent.

Abstract

The explicit CP violation in the MSSM radiatively induces a finite unremovable alignment between the Higgs doublets. This additinal phase can be as large as the original CP phases in certain portions of the MSSM parameter space. Considering the specific case of the charginos, this additional phase is shown to induce a conceivable amount of CP violation near the would--be CP conserving points. Moreover, the CP violation in the absence of this phase is smaller than the one in the presence of it, and the former can never compete with the latter, however large $\tan\beta$ is.