Gaugino portal baryogenesis

Pierce, Aaron; Shakya, Bibhushan

doi:10.1007/jhep06(2019)096

Title: Gaugino portal baryogenesis

Journal Article · 18 June 2019 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/jhep06(2019)096 · OSTI ID:1610962

Pierce, Aaron ^[1]; Shakya, Bibhushan ^[2]

Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics; DOE/OSTI
Univ. of California, Santa Cruz, CA (United States). Santa Cruz Institute for Particle Physics; Univ. of Cincinnati, OH (United States); Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics

We study baryogenesis via a gaugino portal, the supersymmetric counterpart to the widely studied kinetic mixing portal, to a hidden sector. CP and baryon number violating decays of a hidden sector gaugino into the visible sector can produce the observed baryon asymmetry of the Universe. The tiny portal coupling is crucial in producing late out-of-equilibrium decays, after washout processes that can erase the asymmetry have gone out of equilibrium. We study this mechanism within various scenarios, including freezein or freeze-out of the hidden gaugino, as well as extended frameworks where the hidden sector contains a weakly interacting massive particle (WIMP) dark matter candidate. This mechanism can produce the desired asymmetry over a wide range of mass scales, including for hidden gaugino masses as low as 10 GeV. We also discuss possible related signals with direct collider searches, at low energy experiments, and in dark matter direct and indirect detection.

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Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: SC0007859

OSTI ID:: 1610962

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 6 Vol. 2019; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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