Tight bonds between sterile neutrinos and dark matter

Journal Article · Tue Jul 01 00:00:00 EDT 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/07/042· OSTI ID:22373444

Bringmann, Torsten ^[1]; Hasenkamp, Jasper ^[2]; Kersten, Jörn ^[3]

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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)

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.

• OSTI ID: 22373444
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 07; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABUNDANCE
COSMOLOGY
INTERACTIONS
NEUTRINOS
NONLUMINOUS MATTER