CP in the dark

TL;DR

This paper introduces a scalar model with a hidden sector that provides a dark matter candidate and exhibits CP violation exclusively within the hidden sector, exploring potential experimental signatures.

Contribution

The paper presents a novel scalar model with a hidden sector allowing CP violation only there, offering new insights into dark matter and CP violation phenomenology.

Findings

Model contains two scalar doublets and a singlet with a discrete symmetry.

Hidden sector CP violation occurs exclusively in the scalar sector.

Potential experimental signatures of hidden CP violation are discussed.

Abstract

We build a model containing two scalar doublets and a scalar singlet with a specific discrete symmetry. After spontaneous symmetry breaking, the model has Standard Model-like phenomenology, as well as a hidden scalar sector which provides a viable dark matter candidate. We show that CP violation in the scalar sector occurs exclusively in the hidden sector, and consider possible experimental signatures of this CP violation.