Asymmetric condensed dark matter

Abstract

We explore the viability of a boson dark matter candidate with an asymmetry between the number densities of particles and antiparticles. A simple thermal field theory analysis confirms that, under certain general conditions, this component would develop a Bose-Einstein condensate in the early universe that, for appropriate model parameters, could survive the ensuing cosmological evolution until now. The condensation of a dark matter component in equilibrium with the thermal plasma is a relativistic process, hence the amount of matter dictated by the charge asymmetry is complemented by a hot relic density frozen out at the time of decoupling. Contrary to the case of ordinary WIMPs, dark matter particles in a condensate must be lighter than a few tens of eV so that the density from thermal relics is not too large. Big-Bang nucleosynthesis constrains the temperature of decoupling to the scale of the QCD phase transition or above. This requires large dark matter-to-photon ratios and very weak interactions with standard model particles.

30 pages, 1 figure. Some improvements with respect to the previous version. To appear in JCAP

References in corpus (13)

• Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
• Understanding the Core-Halo Relation of Quantum Wave Dark Matter, $\psi$DM, from 3D Simulations
• Bose-Einstein Condensation of Dark Matter Axions
• A search for ultra-light axions using precision cosmological data
• Theory of Dark Matter Superfluidity
• Axion cold dark matter in view of BICEP2 results
• Axions: Bose Einstein Condensate or Classical Field?
• Bose-Einstein Condensation in the Relativistic Ideal Bose Gas
• Viability of complex self-interacting scalar field as dark matter
• Dwarf spheroidal galaxies and Bose-Einstein condensate dark matter
• Rotation curves of ultralight BEC dark matter halos with rotation
• Cosmological nonlinear structure formation in full general relativity
• Cosmological scalar field perturbations can grow

Cited by in corpus (9)

• Towards accurate cosmological predictions for rapidly oscillating scalar fields as dark matter
• Boson stars and their relatives in semiclassical gravity
• Self-gravitating black hole scalar wigs
• The Milky Way's rotation curve with superfluid dark matter
• Strong lensing with superfluid dark matter
• Very Light Asymmetric Dark Matter
• Asymmetric dark matter with a possible Bose-Einstein condensate
• Three problems of superfluid dark matter and their solution
• The role of the chemical potential in coupling superfluid dark matter to baryons