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

Autor(es)

Dutra, Maira ^[1] ; Oliveira, Vinicius ^[2] ; Pires, C. A. de S. ^[2] ; Queiroz, Farinaldo S. ^{[3, 4]}

Afiliação do(s) autor(es)

^[1] Carleton Univ, Ottawa Carleton Inst Phys, 1125 Colonel By Dr, Ottawa, ON K1S 5B6 - Canada

^[2] Univ Fed Paraiba, Dept Fis, Caixa Postal 5008, BR-58051970 Joao Pessoa, Paraiba - Brazil

^[3] Univ Fed Rio Grande do Norte, Int Inst Phys, Campus Univ, BR-59078970 Natal, RN - Brazil

^[4] Univ Fed Rio Grande do Norte, Dept Fis, BR-59078970 Natal, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of High Energy Physics; n. 10 OCT 1 2021.
• Citações Web of Science: 0

Resumo

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. (AU)

• Processo FAPESP: 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica
• Beneficiário: Nathan Jacob Berkovits
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais