Low-Scale See-Saw Mechanism and the Majorana Nature of Heavy Neutrinos

@misc{okawa2026lowscale,
  title = {{Low-Scale See-Saw Mechanism and the Majorana Nature of Heavy Neutrinos}},
  author = {Takuya Okawa and S. T. Petcov},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.21886},
  eprint = {2610.21886},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.21886},
}

TY  - UNPB
TI  - Low-Scale See-Saw Mechanism and the Majorana Nature of Heavy Neutrinos
AU  - Takuya Okawa
AU  - S. T. Petcov
PY  - 2026
DA  - 2026/10/27
PB  - arXiv
DO  - 10.48550/arxiv.2610.21886
UR  - https://arxiv.org/abs/2610.21886
AB  - We investigate the possibility to determine the Majorana nature of the heavy Majorana neutrinos present in the low-scale type I seesaw mechanism of neutrino mass generation in experiments at e^+ − e^- and μ^+ − μ^- colliders. This is done on the examples of two specific symmetry-protected seesaw scenarios with two right-handed (RH) singlet neutrinos and one seesaw realization with three RH neutrinos. We use the forward-backward symmetry in the angular distribution of the heavy neutral leptons produced in the e^+ − e^- and μ^+ − μ^- collisions as an indicator of their Majorana nature. Our results indicate that the experiments at FCCee during its first phase of operation have a remarkable potential not only to discover the heavy neutral leptons associated with the type I seesaw mechanism if they have masses smaller than the Z^0-boson mass, but also to probe and provide evidence for their Majorana nature.
ER  -