Artículos de revistas
Cosmological Bounds Of Sterile Neutrinos In A S U(3) (c) Asus U(3) (l) Asus U(3) (r) Asuu(1) (n) Model As Dark Matter Candidates
Registro en:
1678-4448
Brazilian Journal Of Physics. SPRINGER, n. 46, n. 4, p. 453 - 461.
1678-4448
WOS:000379687800010
10.1007/s13538-016-0427-2
Autor
Ferreira
CP; Guzzo
MM; de Holanda
PC
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) We study sterile neutrinos in an extension of the standard model, based on the gauge group S U(3) (C) aSuS U(3) (L) aSuS U(3) (R) aSuU(1) (N) , and use this model to illustrate how to apply cosmological limits to thermalized particles that decouple while relativistic. These neutrinos, N (a L) , can be dark matter candidates, with a kiloelectron volt mass range arising rather naturally in this model. We analyse the cosmological limits imposed by N (e f f) and dark matter abundance on these neutrinos. Assuming that these neutrinos have roughly equal masses and are not CDM, we conclude that the N (e f f) experimental value can be satisfied in some cases and the abundance constraint implies that these neutrinos are hot dark matter. With this information, we give upper bounds on the Yukawa coupling between the sterile neutrinos and a scalar field, the possible values of the VEV of this scalar field and lower bounds to the mass of one gauge boson of the model. 46
453 461 Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)