BITS Faculty Publications

Permanent URI for this communityhttp://localhost:4000/handle/123456789/1867

Browse

Filters

20181

Settings

Author: search.filters.author.Chauhan, BhaveshSubject: search.filters.subject.Cosmology: Theory

Search Results

Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    Sub-MeV Self Interacting Dark Matter
    (APS, 2018-06) Chauhan, Bhavesh
    In this paper, we present a model for sub-MeV dark matter with strong self-interactions which can solve some of the small-scale crisis of the Λ⁢CDM. The dark matter is a Majorana fermion with only off-diagonal interactions with a hidden 𝑈⁢(1)𝐷 gauge boson. The relic density is obtained by freeze-out of Boltzmann suppressed annihilations to a light fermionic species. The self-interaction is a one-loop process and constrained to be between 0.1 to 1  cm2/g. Severe constraints from the BBN on 𝑁eff require that the dark and visible sector are not in thermal equilibrium during freeze-out. The effect of this temperature asymmetry is studied.