WIMPy baryogenesis with sterile neutrinos

4th Symposium on Prospects in the Physics of Discrete Symmetries

Racker, Juan^1 ; Rius, Nuria^1

Departamento de Física Teórica, Instituto de Física Corpuscular (IFIC), Universidad de Valencia-CSIC, Edificio de Institutos de Paterna, Valencia

46071, Spain^1

关键词: Baryogenesis;    Baryon asymmetry;    Dark matter;    Heavy particles;    Neutrino mass;    Particle decay;    Standard model;    Sterile neutrinos;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/631/1/012086/pdf
DOI  :  10.1088/1742-6596/631/1/012086

来源: IOP

【 摘 要 】

In this talk we propose a mechanism for baryogenesis from particle decays or annihilations that can work at the TeV scale. Some heavy particles annihilate or decay into a heavy sterile neutrino N (with M1 TeV) and a "light" one ν (with m100 GeV), generating an asymmetry among the two helicity degrees of freedom of v. This asymmetry is partially transferred to Standard Model leptons via fast Yukawa interactions and reprocessed into a baryon asymmetry by the electroweak sphalerons. We illustrate this mechanism in a WIMPy baryogenesis model where the helicity asymmetry is generated in the annihilation of dark matter. This model connects the baryon asymmetry, dark matter, and neutrino masses.