WIMPy baryogenesis with sterile neutrinos. (July 2015)

• Record Type: Journal Article
• Authors: Racker, Juan; Rius, Nuria
• Is Part Of: Journal of physics. Number 631(2015)
• Publication Date: 2015-07
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/631/1/012086
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: 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 M ≳ 1 TeV) and a "light" one ν (with m ≪ 100 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.