Neutrinoful universe

Tetsutaro Higaki, Ryuichiro Kitano, Ryosuke Sato

研究成果: Article査読

50 被引用数 (Scopus)

抄録

The Standard Model of particle physics fails to explain the important pieces in the standard cosmology, such as inflation, baryogenesis, and dark matter of the Universe. We consider the possibility that the sector to generate small neutrino masses is responsible for all of them; the inflation is driven by the Higgs field to break B - L gauge symmetry which provides the Majorana masses to the right-handed neutrinos, and the reheating process by the decay of the B - L Higgs boson supplies the second lightest right-handed neutrinos whose CP violating decays produce B - L asymmetry, à la, leptogenesis. The lightest right-handed neutrinos are also produced by the reheating process, and remain today as the dark matter of the Universe. In the minimal model of the inflaton potential, one can set the parameter of the potential by the data from CMB observations including the BICEP2 and the Planck experiments. In such a scenario, the mass of the dark matter particle is predicted to be of the order of PeV. We find that the decay of the PeV right-handed neutrinos can explain the high-energy neutrino flux observed at the IceCube experiments if the lifetime is of the order of 1028 s.

本文言語English
論文番号44
ジャーナルJournal of High Energy Physics
2014
7
DOI
出版ステータスPublished - 2014 7月
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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