A model for mixed warm and hot right-handed neutrino dark matter

Journal of High Energy Physics

C. A de S. Pires¹  Vinícius Oliveira¹  Farinaldo S. Queiroz²  Maíra Dutra³ 

[1] Departamento de Física, Universidade Federal da Paraíba;International Institute of Physics, Universidade Federal do Rio Grande do Norte;Ottawa-Carleton Institute for Physics, Carleton University;

关键词: Beyond Standard Model;    Cosmology of Theories beyond the SM;    Gauge Symmetry;    Neutrino Physics;   

DOI  :  10.1007/JHEP10(2021)005

来源: DOAJ

【 摘 要 】

Abstract We discuss a model where a mixed warm and hot keV neutrino dark matter rises naturally. We arrange active and sterile neutrinos in the same SU(3) L multiplet, with the lightest sterile neutrino being dark matter. The other two heavy sterile neutrinos, through their out-of-equilibrium decay, contribute both to the dilution of dark matter density and its population, after freeze-out. We show that this model features all ingredients to overcome the overproduction of keV neutrino dark matter, and explore the phenomenological implications for Big Bang Nucleosynthesis and the number of relativistic degrees of freedom.

【 授权许可】

Unknown