2015/02/28 by Yasuhiro Daikoku, Hiroshi Okada · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Higgs boson #Leptogenesis #Lepton #Multiplet #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Spectral line #Standard Model (mathematical formulation) #hep-ph
paper · pdf · doi:10.1103/physrevd.91.075009
published as Phys. Rev. D 91, 075009 (2015) · 16 pages, 3 tables: version accepted for publication in Physical Review D
arxiv created 2015/03/28 · openalex publication_date 2015/04/13 · arxiv updated 2015/04/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Recent observations of high-energy neutrinos in the IceCube experiment suggests the existence of superheavy dark matter beyond the PeV scale. We identify the parent particles of neutrinos as two degenerated right-handed neutrinos, assuming the dark matter is the heaviest right-handed neutrino. The O(Vcb)\ensuremath∼O(10^\ensuremath-2) flavor symmetry breaking accounts for the O(10^\ensuremath-4) mass degeneracy of right-handed neutrinos, which is a sizable scale to explain the successful resonant leptogenesis at the PeV scale. At the same time, nonthermal production of the heaviest right-handed neutrino gives the right amount of dark matter for TRH\ensuremath∼10 PeV. The footprint of flavor symmetry is left in the degenerated mass spectra of the extra Higgs multiplet and colored Higgs multiplet, which may be testable at the LHC or future colliders.