Non-thermal WIMP baryogenesis

We propose a model of baryogenesis achieved by the annihilation of non-thermally produced WIMPs from decay of heavy particles, which can result in low reheating temperature. Dark matter (DM) can be produced non-thermally during a reheating period created by the decay of long-lived heavy particle, an...

Full description

Saved in:
Bibliographic Details
Published inPhysics letters. B Vol. 782; pp. 657 - 661
Main Authors Choi, Ki-Young, Kang, Sin Kyu, Kim, Jongkuk
Format Journal Article
LanguageEnglish
Published Elsevier B.V 10.07.2018
Elsevier
Subjects
Baryogenesis
Dark matter
Early Universe
Dark matter
Early Universe
Baryogenesis
Online AccessGet full text

Cover

More Information
Summary:We propose a model of baryogenesis achieved by the annihilation of non-thermally produced WIMPs from decay of heavy particles, which can result in low reheating temperature. Dark matter (DM) can be produced non-thermally during a reheating period created by the decay of long-lived heavy particle, and subsequently re-annihilate to lighter particles even after the thermal freeze-out. The re-annihilation of DM provides the observed baryon asymmetry as well as the correct relic density of DM. We investigate how washout effects can affect the generation of the baryon asymmetry and study a model suppressing them. In this scenario, we find that DM can be heavy enough and its annihilation cross section can also be larger than that adopted in the usual thermal WIMP baryogenesis.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2018.05.083