Measurement of CP Violation in the MSSM Neutralino Sector with the ILD

TL;DR

This study investigates CP violation in the MSSM neutralino sector using ILD detector simulations at 500GeV, demonstrating the potential to measure CP asymmetries with 10% accuracy in collider experiments.

Contribution

It provides a detailed simulation-based analysis of CP-sensitive asymmetries in neutralino production within the MSSM at future colliders, incorporating realistic detector and background effects.

Findings

Achieves 10% measurement accuracy for CP asymmetry

Uses full ILD detector simulation with realistic conditions

Assesses CP violation effects in neutralino production

Abstract

Supersymmetric models provide many new complex phases which lead to CP violating effects in collider experiments. As an example, CP-sensitive triple product asymmetries in neutralino production and subsequent leptonic two-body decays are studied within the Minimal Supersymmetric Standard Model. A full ILD detector simulation has been performed at a center of mass energy of 500GeV, including the relevant Standard Model background processes, a realistic beam energy spectrum, beam backgrounds and a beam polarization of 80% and -60% for the electron and positron beams, respectively. Assuming an integrated luminosity of 500fb-1 collected by the experiment and the performance of the current ILD detector, a relative measurement accuracy of 10% for the CP-sensitive asymmetry can be achieved in the chosen scenario.