Cannibal Dark Matter and Large Scale Structure

Abstract

Cannibals are dark matter particles with a scattering process that allows three particles to annihilate to two. This exothermic process keeps the gas of the remaining particles warm long after they become non-relativistic. A cannibalizing dark sector which is decoupled from the Standard Model naturally arises from a pure-glue confining hidden sector. It has an effective field theory description with a single massive interacting real scalar field, the lightest glueball. Since warm dark matter strongly suppresses growth of structure cannibals cannot be all of the dark matter. Thus we propose a scenario where most dark matter is non-interacting and cold but about 1 percent is cannibalistic. We review the cannibals' unusual scaling of the temperature and energy and number densities with redshift and generalize the equations for the growth of matter density perturbations to the case of cannibals. We solve the equations numerically to predict the scaling of the Hubble parameter and the characteristic shape of the linear matter power spectrum as a function of model parameters. Our results may have implications for the ${\sigma }_8$ and $H_0$ problems.

arXiv comment25 pages, 1 appendix. v2: typos corrected, added references

References in corpus (54)

• A 2.4% Determination of the Local Value of the Hubble Constant
• Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
• Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
• Massive neutrinos and cosmology
• The glueball spectrum from an anisotropic lattice study
• The trouble with $H_0$
• CFHTLenS tomographic weak lensing cosmological parameter constraints: Mitigating the impact of intrinsic galaxy alignments
• Planck 2013 results. XX. Cosmology from Sunyaev-Zeldovich cluster counts
• The SIMP Miracle
• Planck 2015 results. XXIV. Cosmology from Sunyaev-Zeldovich cluster counts
• H0LiCOW V. New COSMOGRAIL time delays of HE0435-1223: $H_0$ to 3.8% precision from strong lensing in a flat $\Lambda$CDM model
• The SIMPlest Miracle
• KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering
• CFHTLenS revisited: assessing concordance with Planck including astrophysical systematics
• ETHOS - An Effective Theory of Structure Formation: From dark particle physics to the matter distribution of the Universe
• The high temperature phase transition in SU(N) gauge theories
• Properties of the deconfining phase transition in SU(N) gauge theories
• The implications of an extended dark energy cosmology with massive neutrinos for cosmological tensions
• KiDS-450: Testing extensions to the standard cosmological model
• KiDS-450: The tomographic weak lensing power spectrum and constraints on cosmological parameters
• A fresh look at linear cosmological constraints on a decaying dark matter component
• Elastically Decoupling Dark Matter
• Non-Abelian dark matter and dark radiation
• Production Regimes for Self-Interacting Dark Matter
• Interacting Dark Sector and Precision Cosmology
• Quirky Composite Dark Matter
• Constraints on Self-Interacting Dark Matter
• Cannibal Dark Matter
• Evidence for dark matter interactions in cosmological precision data?
• Neutrinos And Big Bang Nucleosynthesis
• $Z_2$ SIMP Dark Matter
• Hidden SU(N) Glueball Dark Matter
• A tale of two modes: Neutrino free-streaming in the early universe
• Interacting neutrinos in cosmology: exact description and constraints
• Pseudoscalar - sterile neutrino interactions: reconciling the cosmos with neutrino oscillations
• Partially Acoustic Dark Matter, Interacting Dark Radiation, and Large Scale Structure
• Communication with SIMP dark mesons via Z'-portal
• SIMPle Dark Matter: Self-Interactions and keV Lines
• Dark matter component decaying after recombination: lensing constraints with Planck data
• Non-Abelian Dark Forces and the Relic Densities of Dark Glueballs
• Light dark photon and fermionic dark radiation for the Hubble constant and the structure formation
• WIMP and SIMP Dark Matter from the Spontaneous Breaking of a Global Group
• Simply split SIMPs
• Cosmic abundances of SIMP dark matter
• Residual Non-Abelian Dark Matter and Dark Radiation
• Bubble nucleation and growth in very strong cosmological phase transitions
• Resolving phenomenological problems with strongly-interacting-massive-particle models with dark vector resonances
• Vector SIMP dark matter
• Partially Acoustic Dark Matter Cosmology and Cosmological Constraints
• Light Dark Matter through Assisted Annihilation
• Hidden Charged Dark Matter and Chiral Dark Radiation
• Testing for New Physics: Neutrinos and the Primordial Power Spectrum
• SIMP from a strong U(1) gauge theory with a monopole condensation
• Searching for Signatures of Dark matter-Dark Radiation Interaction in Observations of Large-scale Structure

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• Dark Energy at early times and ACT: a larger Hubble constant without late-time priors
• Co-SIMP Miracle
• Cosmological constraints on late-universe decaying dark matter as a solution to the $H_0$ tension
• Generalized Emergent Dark Energy Model and the Hubble Constant Tension
• Late-time decaying dark matter: constraints and implications for the $H_0$-tension
• Turn up the volume: Listening to phase transitions in hot dark sectors
• Cannibalism hinders growth: Cannibal Dark Matter and the $S_8$ tension
• The Thermal History of Composite Dark Matter
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Confronting interacting dark radiation scenarios with cosmological data
• Fractional Dark Matter decay: cosmological imprints and observational constraints
• Cannibal domination and the matter power spectrum
• Possible Hints of Sterile Neutrinos in Recent Measurements of the Hubble Parameter
• Exploring the Universe with Dark Light Scalars
• Cannibalism's lingering imprint on the matter power spectrum
• Ballistic Dark Matter oscillates above $\Lambda$CDM
• Dark Sector Glueballs at the LHC
• The Milky Way, Coming into Focus: Precision Astrometry Probes its Evolution, and its Dark Matter
• Can decaying dark matter scenarios alleviate both $H_0$ and ${\sigma }_8$ tensions?
• Early Dark Energy from a Higher-dimensional Gauge Theory
• Large $N$-ightmare Dark Matter
• Cannibal dark matter decoupled from standard model: cosmological constraints
• Dark Matter Cosmology with Varying Viscosity: a Possible Resolution to the $S_8$ Tension
• Self-Interacting Dark Matter in Cosmology: accurate numerical implementation and observational constraints
• Freezing-in Cannibal Dark Sectors
• Common Origin of Warm Dark Matter and Dark Radiation
• Cosmological implications of inflaton-mediated dark and visible matter scatterings after reheating