Preprint
Aug 2026
How to Identify a Majoron: Effective Field Theories of Spontaneous Lepton Number Breaking
We revisit the traditional Type I, II and III Seesaw mechanisms in the presence of a complex scalar field charged under a global $U(1)$ symmetry that can be identified with lepton number and the Peccei-Quinn symmetry. After symmetry breaking, the radial mode becomes heavy while the angular mode appears as an axion-like...
C. Biggio, M. F. Zamoro, Xu Li et al.
· 3 citations