Gravitational Wave Spectral Shapes as a probe of Long Lived Right-handed Neutrinos, Leptogenesis and Dark Matter: Global versus Local B-L Cosmic Strings

Satyabrata Datta, Anish Ghoshal, Angus Spalding +1

The scale of the seesaw mechanism is typically much larger than the electroweak scale. This hierarchy can be naturally explained by $U(1{)}_{B-L}$ symmetry, which after spontaneous s…