Heavy neutrinos and the kinematics of tau decays

Andrew Kobach, Sean Dobbs

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Searches for heavy neutrinos often rely on the possibility that the heavy neutrinos will decay to detectable particles. Interpreting the results of such searches requires a particular model for the heavy-neutrino decay. We present a method for placing limits on the probability that a tau can couple to a heavy neutrino, |Uτ4|2, using only the kinematics of semileptonic tau decays, instead of a specific model. Our study suggests that B factories with large data sets, such a Belle and BABAR, may be able to place stringent limits on |Uτ4|2 as low as O(10-7-10-3) when 100MeV≲m4≲1.2GeV, utilizing minimal assumptions regarding the decay modes of heavy neutrinos.

Original languageEnglish (US)
Article number053006
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number5
StatePublished - Mar 12 2015

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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