Parity Violation in Composite Inelastic Dark Matter Models

TL;DR

This paper explores how parity violation in composite inelastic dark matter models affects scattering processes, providing a theoretical framework consistent with experimental data and revealing complex phenomenology.

Contribution

It introduces an effective field theory for composite inelastic dark matter with parity violation, highlighting new scattering channels and their experimental implications.

Findings

Parity violation induces elastic and inelastic scattering admixture.

The model remains consistent with direct detection constraints.

Multiple scattering channels lead to rich phenomenology.

Abstract

Recent experimental results indicate that the dark matter sector may have a non-minimal structure with a spectrum of states and interactions. Inelastic scattering has received particular attention in light of DAMA's annual modulation signal. Composite inelastic dark matter (CiDM) provides a dynamical origin for the mass splittings in inelastic dark matter models. We show that higher dimensional operators in the CiDM Lagrangian lead to an admixture of inelastic and elastic scattering in the presence of parity violation. This scenario is consistent with direct detection experiments, even when parity violation is nearly maximal. We present an effective field theory description of such models and discuss the constraints from direct detection experiments. The CiDM model with parity violation has non-trivial phenomenology because of the multiple scattering channels that are allowed.