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Title: Tight bonds between sterile neutrinos and dark matter

Despite the astonishing success of standard ΛCDM cosmology, there is mounting evidence for a tension with observations at small and intermediate scales. We introduce a simple model where both cold dark matter (DM) and sterile neutrinos are charged under a new U(1){sub X} gauge interaction. The resulting DM self-interactions resolve the tension with the observed abundances and internal density structures of dwarf galaxies. At the same time, the sterile neutrinos can account for both the small hot DM component favored by cosmological observations and the neutrino anomalies found in short-baseline experiments.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Physics, University of Oslo, Box 1048, Oslo, NO-0316 Norway (Norway)
  2. Center for Cosmology and Particle Physics, New York University, 70 Washington Square S, New York, NY, 10003 (United States)
  3. II. Institute for Theoretical Physics, University of Hamburg, Luruper Chaussee 149, Hamburg, DE-22761 (Germany)
Publication Date:
OSTI Identifier:
22373444
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 07; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; COSMOLOGY; INTERACTIONS; NEUTRINOS; NONLUMINOUS MATTER