2025/05/14 by Ramírez, Enrique, Novales-Sánchez, Héctor, Vázquez-Castro, Humberto +1
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2505.09051
Lepton flavor violating decays ℓα → ℓβ γ, being forbidden in the Standard Model framework, provide a sensitive probe for new physics. We study these processes in a seesaw variant in which small neutrino masses are generated radiatively. By analyzing the parameter space constrained by electroweak precision data, we investigate the correlation between these decays and non-unitary effects from TeV-scale heavy neutrinos. According to our results, μ→ e γ is the most promising channel for new physics searches, with the bound |ημe| \lesssim 10-6 obtained for non-unitary effects in this radiative seesaw variant. Our estimations of BR ( μ→ e γ), which depends on the mass of the heavy neutrinos, shows that both current and future experimental facilities might be sensitive to these effects.