| Texto completo | |
| Autor(es): |
Queiroz, Farinaldo S.
;
Siqueira, Clarissa
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 101, n. 7, p. 9-pg., 2020-04-06. |
| Resumo | |
We have witnessed in the past decade the observation of a puzzling cosmic-ray excess at energies larger than 10 GeV. The AMS-02 data published this year have new ingredients such as the bump around 300 GeV followed by a drop at 800 GeV, as well as smaller error bars. Adopting the background used by the AMS-02 Collaboration in their analysis, one can conclude that previous explanations to the new AMS-02 such as one component annihilating and decaying dark matter as well as pulsars seem to fail at reproducing the data. Hem, we show that in the right-handed neutrino portal might reside the answer. We discuss a decaying two-component dark matter scenario where the two-body decay products are right-handed neutrinos that have their decay pattern governed by the type-I seesaw mechanism. This setup provides a very good fit to the data; for example, a conservative approach including just statistical uncertainties leads to chi(2)/DOF similar to 2.3 for m(DM1)= 2150 GeV with tau(1) = 3.78 x 10(26) s and m(DM2) = 300 with tau(2 )= 5.0 x 10(27)s for M-N = 10 GeV, and, in an optimistic case, including systematic uncertainties, we find chi(2)/DOF similar to 1.12, for M-N = 10 GeV, with m(DM1 )= 2200 GeV with tau(1) = 3.8 x 10(26) s and m(DM2) = 323 GeV with tau(2) = 1.68 x 10(27) s. (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 |