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hep-ph2026
Low-Scale See-Saw Mechanism and the Majorana Nature of Heavy Neutrinos
Takuya Okawa, S. T. Petcov
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 expe…
hep-ph2026
Reappraisal of the Constraints on Heavy Axion-like Particles from Gamma-Ray Bursts
Christopher V. Cappiello, Saurav Das, P. S. Bhupal Dev +2
We reassess existing limits and derive new constraints on heavy axion-like particle (ALP) coupling to photons using gamma-ray bursts (GRBs). ALPs can be produced in the hot dense f…