Multi-component Dark Sectors: Symmetries, Asymmetries and Conversions

Abstract

We study the relic abundance of several stable particles from a generic dark sector, including the possible presence of dark asymmetries. After discussing the different possibilities for stabilising multi-component dark matter, we analyse the final relic abundance of the symmetric and asymmetric dark matter components, paying special attention to the role of the unavoidable conversions between dark matter states. We find an exponential dependence of the asymmetries of the heavier components on annihilations and conversions. We conclude that having similar symmetric and asymmetric components is a natural outcome in many scenarios of multi-component dark matter. This has novel phenomenological implications, which we briefly discuss.

arXiv comment31 pages, 11 figures, 3 tables; Version published in JHEP

References in corpus (47)

• Gauge Singlet Scalars as Cold Dark Matter
• The Minimal Model of Nonbaryonic Dark Matter: A Singlet Scalar
• Asymmetric Dark Matter
• Update on scalar singlet dark matter
• Asymmetric Dark Matter: Theories, Signatures, and Constraints
• Review of asymmetric dark matter
• Forbidden Dark Matter
• Some Simple Criteria for Gauged R-parity
• Multi-Component Dark Matter
• Light and Heavy Dark Matter Particles
• Asymmetric WIMP dark matter
• Dynamical Dark Matter: I. Theoretical Overview
• Semi-annihilation of Dark Matter
• Thermal Dark Matter From A Highly Decoupled Sector
• Assisted freeze-out
• Dark Matter and Global Symmetries
• Z_3 Dark Matter and Two-Loop Neutrino Mass
• Impact of semi-annihilations on dark matter phenomenology - an example of Z_N symmetric scalar dark matter
• $Z_3$ Scalar Singlet Dark Matter
• Multipartite Interacting Scalar Dark Matter in the light of updated LUX data
• Multi-Component Dark Matter Systems and Their Observation Prospects
• Dark Discrete Gauge Symmetries
• Reopening the Higgs portal for Singlet Scalar Dark Matter
• Can we discover dual-component thermal WIMP dark matter?
• Mitigating Direct Detection Bounds in Non-minimal Higgs Portal Scalar Dark Matter Models
• Identification of Dark Matter particles with LHC and direct detection data
• Self-interacting inelastic dark matter: A viable solution to the small scale structure problems
• Cosmic Coincidence and Asymmetric Dark Matter in a Stueckelberg Extension
• Multipartite Dark Matter with Scalars, Fermions and signatures at LHC
• On the direct detection of multi-component dark matter: sensitivity studies and parameter estimation
• Distinguishing Dark Matter Stabilization Symmetries Using Multiple Kinematic Edges and Cusps
• Halo-independent tests of dark matter direct detection signals: local DM density, LHC, and thermal freeze-out
• Multi-component scalar dark matter from a $Z_N$ symmetry: a systematic analysis
• Lightest U-parity Particle (LUP) dark matter
• Two dark matter candidates: the case of inert doublet and singlet scalars
• Exchange driven freeze out of dark matter
• Enhancement of dark matter relic density from the late time dark matter conversions
• On the direct detection of multi-component dark matter: implications of the relic abundance
• Time-dependent rate of multicomponent dark matter: Reproducing the DAMA/LIBRA phase-2 results
• Pinning down inelastic dark matter in the Sun and in direct detection
• Implications of Two-component Dark Matter Induced by Forbidden Channels and Thermal Freeze-out
• A multi-component SIMP model with $U(1{)}_X\to Z_2\times Z_3$
• Counting dark matter particles in LHC events
• Forbidden Scalar Dark Matter and Dark Higgses
• Dark Matter Stabilization Symmetries from Spontaneous Symmetry Breaking
• Freeze-out Forbidden Dark Matter in the Hidden Sector in the Mass Range from sub-GeV to TeV
• More is Different: Non-Minimal Dark Sectors and their Implications for Particle Physics, Astrophysics, and Cosmology -- 13 Take-Away Lessons for Snowmass 2021

Cited by in corpus (8)

• The $Z_7$ model of three-component scalar dark matter
• Large neutrino mass in cosmology and keV sterile neutrino dark matter from a dark sector
• Prospecting bipartite Dark Matter through Gravitational Waves
• Phase Transitions and Gravitational Waves in a Model of ${\mathbb{Z}}_3$ Scalar Dark Matter
• $U(1)$-charged Dark Matter in three-Higgs-doublet models
• Gravitational wave signatures of first-order phase transition in two-component dark matter model
• Asymmetries in Extended Dark Sectors: A Cogenesis Scenario
• Exploring two component doublet dark matter