Lepton number violation in TeV scale see-saw extensions of the standard model

A. Ibarra, E. Molinaro, S. T. Petcov

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations

Abstract

The low-energy neutrino physics constraints on the TeV scale type I see-saw scenarios of neutrino mass generation are revisited. It is shown that lepton charge (L) violation, associated to the production and decays of heavy Majorana neutrinos Nj having masses in the range of Mj ∼ (100 ÷ 1000) GeV and present in such scenarios, is hardly to be observed at ongoing and future particle accelerator experiments, LHC included, because of very strong constraints on the parameters and couplings responsible for the corresponding |ΔL| = 2 processes. If the heavy Majorana neutrinos N j are observed and they are associated only with the type I mechanism, they will behave effectively like pseudo-Dirac fermions. Conversely, the observation of effects proving the Majorana nature of Nj would imply that these heavy neutrinos have additional relatively strong couplings to the Standard Model particles or that light neutrino masses compatible with the observations are generated by a mechanism other than see-saw (e.g., radiatively at one or two loop level) in which the heavy Majorana neutrinos Nj are nevertheless involved.

Original languageEnglish
Article number012048
JournalJournal of Physics: Conference Series
Volume335
Issue number1
DOIs
StatePublished - 2011
Event2nd Symposium on Prospects in the Physics of Discrete Symmetries, DISCRETE 2010 - Rome, Italy
Duration: 6 Dec 201011 Dec 2010

Fingerprint

Dive into the research topics of 'Lepton number violation in TeV scale see-saw extensions of the standard model'. Together they form a unique fingerprint.

Cite this