IceCube PeV-EeV neutrinos and secret interactions of neutrinos

Kunihito Ioka, Kohta Murase

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88 Scopus citations


We show that the PeV neutrinos detected by IceCube put unique constraints on "secret" interactions of neutrinos with the cosmic neutrino background (CνB). The coupling must be g < 0.03 for the mediating boson mass mX ≲ 2MeV, g/mX < 5 GeV-1 for mX ≳ 20MeV, and g/mX < 0.07 GeV-1 in between. We also investigate the possibility that neutrino cascades degrade highenergy neutrinos to PeV energies by upgrading CνB where the energy flux of PeV neutrinos can coincide with the Waxman-Bahcall bound or the cosmogenic neutrino flux for protons, thanks to energy conservation. However, a large coupling is required, which is disfavored by laboratory decay constraints. The suppression of PeV-EeV neutrinos is a testable prediction for the Askaryan Radio Array.

Original languageEnglish (US)
Article number061E01
JournalProgress of Theoretical and Experimental Physics
Issue number6
StatePublished - Jun 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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