paper

Baryogenesis via Gravitational Spontaneous Symmetry Breaking

arXiv:1904.10510 · doi:10.1103/PhysRevD.100.063518

Abstract

We study baryogenesis in effective field theories where a -charged scalar couples to gravity via curvature invariants. We analyze the general possibilities in such models, noting the relationships between some of them and existing models, such as Affleck-Dine baryogenesis. We then identify a novel mechanism in which can be broken by couplings to the Gauss-Bonnet invariant during inflation and reheating. Using analytic methods, we demonstrate that this mechanism provides a new way to dynamically generate the net matter-anti-matter asymmetry observed today, and verify this numerically.

arXiv comment18 pages, 3 figures

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