Journal
PHYSICS LETTERS B
Volume 773, Issue -, Pages 186-190Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2017.08.039
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Funding
- Center for Particle Cosmology by the University of Pennsylvania
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Lorentz-violating theories of gravity typically contain constrained vector fields. We show that the lowestorder coupling of such vectors to U(1)-symmetric scalars can naturally give rise to baryogenesis in a manner akin to the Affleck-Dine mechanism. We calculate the cosmology of this new mechanism, demonstrating that a net B -Lcan be generated in the early Universe, and that the resulting baryon-tophoton ratio matches that which is presently observed. We discuss constraints on the model using solar system and astrophysical tests of Lorentz violation in the gravity sector. Generic Lorentz-violating theories can give rise to the observed matter-antimatter asymmetry without violating any current bounds. (C) 2017 The Author(s). Published by Elsevier B.V.
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