Testing the Seesaw Mechanism and Leptogenesis with Gravitational Waves

Dror, Jeff A.; Hiramatsu, Takashi; Kohri, Kazunori; Murayama, Hitoshi; White, Graham

doi:10.1103/PhysRevLett.124.041804

Title: Testing the Seesaw Mechanism and Leptogenesis with Gravitational Waves

Abstract

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 symmetry be broken below the reheating temperature. We enumerate all such possible symmetries consistent with these minimal assumptions and their corresponding defects, finding that in many cases, gravitational waves from the network of cosmic strings should be detectable. Estimating the predicted gravitational wave background, we find that future space-borne missions could probe the entire range relevant for thermal leptogenesis.

Authors:: Dror, Jeff A.; Hiramatsu, Takashi; Kohri, Kazunori; Murayama, Hitoshi; White, Graham

Publication Date:: 2020-01-28

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC); National Science Foundation (NSF); Japan Society for the Promotion of Science (JSPS)

OSTI Identifier:: 1595510

Alternate Identifier(s):: OSTI ID: 1616096

Grant/Contract Number:: AC02-05CH11231; PHY-1638509

Resource Type:: Published Article

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Name: Physical Review Letters Journal Volume: 124 Journal Issue: 4; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats


                    Dror, Jeff A., Hiramatsu, Takashi, Kohri, Kazunori, Murayama, Hitoshi, and White, Graham. Testing the Seesaw Mechanism and Leptogenesis with Gravitational Waves.  United States: N. p., 2020. 
Web.  doi:10.1103/PhysRevLett.124.041804.

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                    Dror, Jeff A., Hiramatsu, Takashi, Kohri, Kazunori, Murayama, Hitoshi, & White, Graham. Testing the Seesaw Mechanism and Leptogenesis with Gravitational Waves.  United States.  https://doi.org/10.1103/PhysRevLett.124.041804

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                    Dror, Jeff A., Hiramatsu, Takashi, Kohri, Kazunori, Murayama, Hitoshi, and White, Graham. Tue .  
"Testing the Seesaw Mechanism and Leptogenesis with Gravitational Waves".  United States.  https://doi.org/10.1103/PhysRevLett.124.041804.

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@article{osti_1595510,

  title        = {Testing the Seesaw Mechanism and Leptogenesis with Gravitational Waves},

  author       = {Dror, Jeff A. and Hiramatsu, Takashi and Kohri, Kazunori and Murayama, Hitoshi and White, Graham},

  abstractNote = {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 symmetry be broken below the reheating temperature. We enumerate all such possible symmetries consistent with these minimal assumptions and their corresponding defects, finding that in many cases, gravitational waves from the network of cosmic strings should be detectable. Estimating the predicted gravitational wave background, we find that future space-borne missions could probe the entire range relevant for thermal leptogenesis.},

  doi          = {10.1103/PhysRevLett.124.041804},

  journal      = {Physical Review Letters},

  number       = 4,

  volume       = 124,

  place        = {United States},

  year         = {2020},

  month        = {1}

}

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