Neutrino Echoes from Multimessenger Transient Sources

Kohta Murase, Ian M. Shoemaker

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


The detection of the high-energy neutrino event, IceCube-170922A, demonstrated that multimessenger particle astrophysics triggered by neutrino alerts is feasible. We consider time delay signatures caused by secret neutrino interactions with the cosmic neutrino background and dark matter and suggest that these can be used as a novel probe of neutrino interactions beyond the standard model (BSM). The tests with BSM-induced neutrino echoes are distinct from existing constraints from the spectral modification and will be enabled by multimessenger observations of bright neutrino transients with future experiments such as IceCube-Gen2, KM3Net, and Hyper-Kamiokande. The constraints are complementary to those from accelerator and laboratory experiments and powerful for testing various particle models that explain tensions prevailing in the cosmological data.

Original languageEnglish (US)
Article number241102
JournalPhysical review letters
Issue number24
StatePublished - Dec 13 2019

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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