Dark matter and leptogenesis from gravitational production

Autor(es)

Bernal, Nicolas ^[1] ; Fong, Chee Sheng ^[2]

Afiliação do(s) autor(es)

^[1] Univ Antonio Narino, Ctr Invest, Carrera 3 Este 47A-15, Bogota - Colombia

^[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Cosmology and Astroparticle Physics; n. 6 JUN 2021.
• Citações Web of Science: 0

Resumo

Since the gravitational interaction is universal, any particle that ever existed, if kinematically accessible, has to be produced through her. We explore the possibility that dark matter is generated purely from gravitational scatterings together with heavy Majorana right-handed neutrinos that are long-lived. Their late decay could inject significant entropy into the thermal bath, diluting both the dark matter abundance and the cosmic baryon asymmetry, thereby imposing various constraints on the reheating dynamics. Additionally to the entropy injection, long-lived right-handed neutrinos could also be responsible for generating the baryon asymmetry through leptogenesis, and hence establish some nontrivial relations between the dark matter and the right-handed properties, and the reheating dynamics. (AU)

• Processo FAPESP: 19/11197-6 - Teste de precisão de bariogênese
• Beneficiário: Chee Sheng Fong
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores