Neutrino Pair Cerenkov Radiation for Tachyonic Neutrinos

Research output: Contribution to journalArticle

Abstract

The emission of a charged light lepton pair by a superluminal neutrino has been identified as a major factor in the energy loss of highly energetic neutrinos. The observation of PeV neutrinos by IceCube implies their stability against lepton pair Cerenkov radiation. Under the assumption of a Lorentz-violating dispersion relation for highly energetic superluminal neutrinos, one may thus constrain the Lorentz-violating parameters. A kinematically different situation arises when one assumes a Lorentz-covariant, space-like dispersion relation for hypothetical tachyonic neutrinos, as an alternative to Lorentz-violating theories. We here discuss a hitherto neglected decay process, where a highly energetic tachyonic neutrino may emit other (space-like, tachyonic) neutrino pairs. We find that the space-like dispersion relation implies the absence of a q2 threshold for the production of a tachyonic neutrino-antineutrino pair, thus leading to the dominant additional energy loss mechanism for an oncoming tachyonic neutrino in the medium-energy domain. Surprisingly, the small absolute values of the decay rate and energy loss rate in the tachyonic model imply that these models, in contrast to the Lorentz-violating theories, are not pressured by the cosmic PeV neutrinos registered by the IceCube collaboration.

Original languageEnglish
Article number9850312
JournalAdvances in High Energy Physics
Volume2017
DOIs
Publication statusPublished - Jan 1 2017

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Cerenkov radiation
neutrinos
energy dissipation
leptons
antineutrinos
decay rates

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Neutrino Pair Cerenkov Radiation for Tachyonic Neutrinos. / Jentschura, U.; Nándori, I.

In: Advances in High Energy Physics, Vol. 2017, 9850312, 01.01.2017.

Research output: Contribution to journalArticle

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