Asymmetric dark matter from semi-annihilation: unitarity constraints and long-lived final states

2024/12/02 by Tomáš Blažek, T. Blažek, Peter Maták +1 · 1 voice · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1007/jhep04(2025)104

openalex publication_date 2025/04/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

A bstract This work presents an asymmetric dark matter model with relic density determined by the freeze-out of asymmetric semi-annihilations into long-lived particles slowly decaying into the Standard Model states. We carefully consider the CPT symmetry and unitarity constraints to the asymmetries entering the Boltzmann equation. The main idea of the paper is to point out a critical inconsistency in the previous literature, where these constraints are violated. We present a systematic approach to avoid the inconsistency.

Citations

• Cosmic abundances of stable particles: Improved analysis

Cited by

• Perturbative unitarity for models with singlet and doublet scalars

Discussions

• This one proposes an asymmetric dark matter model that has a distinct mechanism for producing the relic dark matter density. #particlephysics #cosmology arxiv.org/abs/2412.01470 [bsky, 6 points, 1 comments]

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