Measuring CP Violating Phases at a Future Linear Collider

TL;DR

This paper explores how future linear colliders can precisely measure chargino and neutralino properties, including CP-violating phases, by analyzing cross sections and accounting for experimental errors.

Contribution

It introduces a systematic method to incorporate cross section data into parameter measurements, enhancing the accuracy of CP phase determination.

Findings

Improved mass and phase measurement accuracy with cross section analysis

Estimated lower limits for observable small CP-violating phases

Assessed impact of experimental errors on parameter extraction

Abstract

At a future Linear Collider one will be able to determine the masses of charginos and neutralinos and their pair production cross sections to high accuracies. We show how systematically including the cross sections into the analysis improves the measurement of the underlying mass parameters, including potential CP violating phases. In addition, we investigate how experimental errors will affect the determination of these parameters. We present a first estimate on the lower limit of observable small phases and on the accuracy in determining large phases.