Baryogenesis via dark matter-induced symmetry breaking in the early Universe

Journal Article · Wed Nov 01 00:00:00 EDT 2017 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2017.09.059· OSTI ID:1437735

Sakstein, Jeremy ; Trodden, Mark

We put forward a new proposal for generating the baryon asymmetry of the universe by making use of the dynamics of a U(1) scalar field coupled to dark matter. High dark matter densities cause the U(1) symmetry to break spontaneously so that the field acquires a large vacuum expectation value. The symmetry is restored when the density redshifts below a critical value, resulting in the coherent oscillation of the scalar field. A net B-L number can be generated either via baryon number-conserving couplings to the standard model or through small symmetry-violating operators and the subsequent decay of the scalar condensate.

• Research Organization: Univ. of Pennsylvania, Philadelphia, PA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); National Aeronautics and Space Administration (NASA)
• Grant/Contract Number: SC0013528; NNX11AI95G
• OSTI ID: 1437735
• Alternate ID(s): OSTI ID: 1499151
• Journal Information: Physics Letters B, Journal Name: Physics Letters B Vol. 774 Journal Issue: C; ISSN 0370-2693
• Publisher: Elsevier
• Country of Publication: Netherlands
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTRONOMY AND ASTROPHYSICS