CP violation in the chargino/neutralino sector of the MSSM

TL;DR

This paper analyzes CP violation effects in the MSSM's neutralino and chargino sectors, highlighting observable CP-odd asymmetries in chargino pair production at one-loop level in e+e- collisions.

Contribution

It provides a full one-loop analysis of CP-odd asymmetries in chargino pair production, contrasting with neutralino sector effects observable at tree level.

Findings

CP-odd asymmetries can be significant in chargino production

Neutralino CP-violation effects are observable without polarization variables

Loop-level effects are essential for chargino CP violation detection

Abstract

The CP-violating effects in the neutralino sector of the MSSM can be observed in event-counting type experiments, i.e. without the need of exploiting variables sensitive to beam or neutralino polarization. On the other hand, such CP-odd effects in the chargino sector can be generated only at the loop level. We contrast the two sectors and present results of full one-loop analysis of the CP-odd asymmetry in the non-diagonal chargino pair production in e+e- collisions.