On the decaying-sterile-neutrino solution to the electron (anti)neutrino appearance anomalies

André de Gouvêa, O. L.G. Peres, Suprabh Prakash*, G. V. Stenico

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We explore the hypothesis that the unexplained data from Liquid Scintillator Neutrino Detector (LSND) and MiniBooNE experiments are evidence for a new, heavy neutrino mass-eigenstate that mixes with the muon-type neutrino and decays into an electron-type neutrino and a new, very light scalar particle. We consider two different decay scenarios, one with Majorana neutrinos, one with Dirac neutrinos; both fit the data equally well. We find a reasonable, albeit not excellent, fit to the data of MiniBooNE and LSND. The decaying-sterile-neutrino hypothesis, however, cleanly evades constraints from disappearance searches and precision measurements of leptonic meson decays, as long as 1 MeV ≳ m4 ≳ 10 keV. The Short-Baseline Neutrino Program (SBN) at Fermilab should be able to definitively test the decaying-sterile-neutrino hypothesis.

Original languageEnglish (US)
Article number141
JournalJournal of High Energy Physics
Volume2020
Issue number7
DOIs
StatePublished - Jul 1 2020

Keywords

  • Beyond Standard Model
  • Neutrino Physics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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