Testing the Seesaw Mechanism and Leptogenesis with Gravitational Waves.

@article{Dror2020TestingTS,
  title={Testing the Seesaw Mechanism and Leptogenesis with Gravitational Waves.},
  author={J. A. Dror and T. Hiramatsu and K. Kohri and H. Murayama and G. White},
  journal={Physical review letters},
  year={2020},
  volume={124 4},
  pages={
          041804
        }
}
We present the possibility that the seesaw mechanism with thermal leptogenesis can be tested using the stochastic gravitational background. Achieving neutrino masses consistent with atmospheric and solar neutrino data, while avoiding nonperturbative couplings, requires right handed neutrinos lighter than the typical scale of grand unification. This scale separation suggests a symmetry protecting the right-handed neutrinos from getting a mass. Thermal leptogenesis would then require that such a… Expand

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