Work

Baryogenesis from dark matter

Year: 2013

Type: article

Abstract: We consider the possibility that some primordial fields decay purely into the dark sector creating asymmetric dark matter. This asymmetry is subsequently transmuted into leptons and baryons. Within this paradigm we compute the amount of asymmetric dark matter created from the out of equilibrium decays of the primordial fields with $CP$ violating Yukawa couplings. The dark matter asymmetry is then transferred to the visible sector by the asymmetry transfer equation and generates an excess of $B\ensuremath{-}L$. Baryogenesis occurs via sphaleron processes which conserve $B\ensuremath{-}L$ but violate $B+L$. A mechanism for the annihilation of the symmetric component of dark matter is also discussed. The model leads to multicomponent dark matter consisting of both bosonic and fermionic components.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.88.036014

Authors: Wan-Zhe Feng, Anupam Mazumdar, Pran Nath

Institutions: Hong Kong University of Science and Technology, Lancaster University, Northeastern University

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Science and Technology Facilities Council

Awards: G2117561390, G6566089108