SUSY CP phases and asymmetries at colliders

TL;DR

This paper explores how CP-violating phases in the MSSM can be detected through asymmetries in particle production and decay at colliders, with potential asymmetries reaching up to 60%.

Contribution

It introduces methods using triple product asymmetries to probe CP phases in collider experiments, specifically in neutralino production and squark decays.

Findings

CP asymmetries up to 60% can be observed.

Triple product asymmetries are effective probes of CP violation.

Potential for detecting CP phases at colliders like ILC and LHC.

Abstract

In the Minimal Supersymmetric Standard Model, physical phases of complex parameters lead to CP violation. We show how triple products of particle momenta or spins can be used to construct asymmetries, that allow us to probe these CP phases. To give specific examples, we discuss the production of neutralinos at the International Linear Collider. For the Large Hadron Collider, we discuss CP asymmetries in squark decays, and in the tri-lepton signal. We find that the CP asymmetries can be as large as 60%.