PoS - Proceedings of Science
Volume 441 - XVIII International Conference on Topics in Astroparticle and Underground Physics (TAUP2023) - Neutrino Physics and Astrophysics
Probing right-handed neutrinos dipole operators
M. Taoso
Full text: pdf
Pre-published on: February 04, 2024
Published on: March 22, 2024
We consider the minimal see-saw extension of the Standard Model with two right-handed singlet fermions $N_{1,2}$ with mass at the GeV scale, augmented by an effective dipole operator between the sterile states. We review current bounds on this effective interaction from fixed-target as well as from cosmological observations. We then highlight the prospects for testing the decay $N_2 \to N_1 \gamma$ induced by the dipole at the future facilities targeting long-lived particles FASER 2 and SHiP.
DOI: https://doi.org/10.22323/1.441.0230
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