A new CP violating observable for the LHC

TL;DR

This paper introduces a novel CP violating observable in three-body decays with intermediate resonances, enabling new insights into CP phases at the LHC and future colliders.

Contribution

It proposes a new observable based on interference effects in three-body decays with different resonance virtualities, advancing CP violation measurement techniques.

Findings

The observable can detect CP violation in specific decay processes.

It provides a new method to access CP phases at high-energy colliders.

Potential applications in future collider experiments.

Abstract

We study a new type of CP violating observable that arises in three body decays that are dominated by an intermediate resonance. If two interfering diagrams exist with different orderings of final state particles, the required CP-even phase arises due to the different virtualities of the resonance in each of the two diagrams. This method can be an important tool for accessing new CP phases at the LHC and future colliders.