Accessible lepton-number-violating models and negligible neutrino masses

André De Gouvêa, Wei Chih Huang, Johannes König, Manibrata Sen

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Lepton-number violation (LNV), in general, implies nonzero Majorana masses for the Standard Model neutrinos. Since neutrino masses are very small, for generic candidate models of the physics responsible for LNV, the rates for almost all experimentally accessible LNV observables - except for neutrinoless double-beta decay - are expected to be exceedingly small. Guided by effective-operator considerations of LNV phenomena, we identify a complete family of models where lepton number is violated but the generated Majorana neutrino masses are tiny, even if the new-physics scale is below 1 TeV. We explore the phenomenology of these models, including charged-lepton flavor-violating phenomena and baryon-number-violating phenomena, identifying scenarios where the allowed rates for μ-→e+-conversion in nuclei are potentially accessible to next-generation experiments.

Original languageEnglish (US)
Article number075033
JournalPhysical Review D
Issue number7
StatePublished - Oct 25 2019

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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