Probing SUSY CP Violation in Two-Body Stop Decays at the LHC

TL;DR

This paper investigates CP asymmetries in stop decays at the LHC to explore CP violation in supersymmetry, identifying parameter regions where such effects could be observed despite experimental constraints.

Contribution

It introduces a method to probe SUSY CP phases via stop decay asymmetries, considering experimental bounds and feasibility at the LHC.

Findings

Potentially detectable CP asymmetries identified in stop decays.

Parameter space regions with sizeable CP asymmetries constrained by EDM bounds.

Motivates further experimental efforts to measure CP violation in SUSY processes.

Abstract

We study CP asymmetries in two-body decays of top squarks into neutralinos and sleptons at the LHC. These asymmetries are used to probe the CP phases possibly present in the stop and neutralino sector of the Minimal Supersymmetric Standard Model. Taking into account bounds from experimental electric dipole moment searches, we identify areas in the mSUGRA parameter space where CP asymmetries can be sizeable and discuss the feasibility of their observation at the LHC. As a result, potentially detectable CP asymmetries in stop decays at the LHC are found, motivating further detailed experimental studies for probing SUSY CP phases.