Landscaping CP-violating BSM scenarios

TL;DR

This paper explores how UV theories of CP violation influence effective operators at the TeV scale, aiming to streamline experimental searches and interpretations using a minimal EFT approach and Monte Carlo simulations.

Contribution

It identifies a small subset of relevant operators from broad UV assumptions, reducing free parameters and improving the sensitivity and interpretability of CP violation searches at the TeV scale.

Findings

A minimal set of EFT operators relevant for CP violation was identified.

Monte Carlo simulations demonstrate the effectiveness of combined Higgs and diboson channels.

The approach simplifies the interpretation of experimental results in terms of UV dynamics.

Abstract

We consider a wide range of UV scenarios with the aim of informing searches for CP violation at the TeV scale using effective field theory techniques. We demonstrate that broad theoretical assumptions about the nature of UV dynamics responsible for CP violation map out a small subset of relevant operators at the TeV scale. Concretely, this will allow us to reduce the number of free parameters that need to be considered in experimental investigations, thus enhancing analyses' sensitivities. In parallel, reflecting the UV dynamics' Wilson coefficient hierarchy will enable a streamlined theoretical interpretation of such analyses in the future. We demonstrate a minimal approach to analysing CP violation in this context using a Monte Carlo study of a combination of weak boson fusion Higgs and electroweak diboson production, which provide complementary information on the relevant EFT operators.