TeV scale see-saw mechanisms of neutrino mass generation, the Majorana nature of the heavy singlet neutrinos and (ββ)0ν-decay

By A. Ibarra, E. Molinaro, S. Petcov. 2010

211 citations recorded by the source corpus.

It is shown that the Majorana nature of the heavy neutrinos Nj having masses in the range of Mj ~ (100 - 1000) GeV and present in the TeV scale type I and inverse see-saw scenarios of neutrino mass generation, is unlikely to be observable in the currently operating and future planned accelerator experiments (including LHC) due to the existence of very strong constraints on the parameters and couplings responsible for the corresponding ∣ΔL∣= 2 processes, L being the total lepton charge. If the heavy Majorana neutrinos Nj are observed and they are associated only with the type I or inverse see-saw mechanisms and no additional TeV scale “new physics”, they will behave like Dirac fermions to a relatively high level of precision, being actually pseudo-Dirac particles. 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 (as, e.g. in the type III see-saw scenario), 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.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6a28375b3e0c050d74f3553848db8657cb0fb53f

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In Nuclear and High Energy Physics

1. M. Drewes
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3. R. Essig
4. A. Ringwald
5. K. Zurek
6. Alexey Boyarsky
7. Oleg Ruchayskiy
8. J. Redondo

Citations in the corpus

• A facility to search for hidden particles at the CERN SPS: the SHiP physics case (2015, methodology): “Using the parametrization discussed above, this matrix can be cast asRV ' −iUlep √ DνΩ ∗ √ D−1 N [390], which can be explicitly written in terms of the largest neutrino Yukawa eigenvalue, |F |, the”