CP-violation in SUSY cascades at the LHC

TL;DR

This paper investigates the potential to detect CP-violation in supersymmetric decay chains at the LHC by using momentum reconstruction techniques to measure asymmetries, despite challenges from boosts and backgrounds.

Contribution

It introduces an extended momentum reconstruction method to enhance the observability of CP-violating asymmetries in SUSY cascades at the LHC.

Findings

Asymmetries can be reconstructed despite boosts.

Method improves sensitivity to CP-violation signals.

Estimated measurable asymmetries at the LHC.

Abstract

We study the potential to observe CP-violating effects in SUSY cascade decay chains at the LHC. Asymmetries composed by triple products of momenta of the final state particles are sensitive to CP-violating effects. Due to large boosts that dilute the asymmetries, these can be difficult to observe. Extending the methods of momentum reconstruction we show that the original size of these asymmetries may be measurable. A study is done at the hadronic level with backgrounds to estimate the expected sensitivity at the LHC.