Probing secret interactions of eV-scale sterile neutrinos with the diffuse supernova neutrino background

Yu Seon Jeong, Sergio Palomares-Ruiz, Mary Hall Reno, Ina Sarcevic

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


Sterile neutrinos with mass in the eV-scale and large mixings of order θ0simeq 0.1 could explain some anomalies found in short-baseline neutrino oscillation data. Here, we revisit a neutrino portal scenario in which eV-scale sterile neutrinos have self-interactions via a new gauge vector boson φ. Their production in the early Universe via mixing with active neutrinos can be suppressed by the induced effective potential in the sterile sector. We study how different cosmological observations can constrain this model, in terms of the mass of the new gauge boson, Mφ, and its coupling to sterile neutrinos, gs. Then, we explore how to probe part of the allowed parameter space of this particular model with future observations of the diffuse supernova neutrino background by the Hyper-Kamiokande and DUNE detectors. For Mφ ∼ 5-10 keV and gs ∼ 10-4-10-2, as allowed by cosmological constraints, we find that interactions of diffuse supernova neutrinos with relic sterile neutrinos on their way to the Earth would result in significant dips in the neutrino spectrum which would produce unique features in the event spectra observed in these detectors.

Original languageEnglish (US)
Article number019
JournalJournal of Cosmology and Astroparticle Physics
Issue number6
StatePublished - Jun 11 2018


  • cosmological neutrinos
  • neutrino theory
  • supernova neutrinos

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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