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Gravitational waves from neutrino mass genesis

Gravitational waves from neutrino mass genesis
Gravitational waves from neutrino mass genesis
The discovery of gravitational waves opens new opportunities to test BSM physics. In particular, the production of a stochastic background of primordial gravitational waves could provide a signature of the generation of the right-right Majorana neutrino mass term necessary, within type-I seesaw mechanism, to explain lightness of neutrinos and their mixing parameters. I will discuss the possibility that such a generation occurs during a strong first order phase transition within Majoron models [1]. As well known, this can indeed produce a stochastic background of gravitational waves. The scale of the phase transition can or cannot coincide with the seesaw scale. In the latter case a low scale phase transition, occurring in the pre-recombination era, might be tested at very low frequencies ($10^{-9}$--$10^{-6}\,{\rm Hz}$). Even though the signal can hardly reproduce the NANOGrac putative signal such new physics at low scale might help ameliorating the tensions in the $\Lambda$CDM cosmological model (e.g., the Hubble tension). I will also discuss how a phase transition might be responsible for the generation of dark matter in the form of dark neutrinos coupling to the seesaw neutrinos via Higgs induced right handed-right handed neutrino mixing [2].
hep-ph
Bari, Pasquale Di
3fe21e59-0eff-41bc-8faa-fdd817146418
Bari, Pasquale Di
3fe21e59-0eff-41bc-8faa-fdd817146418

Bari, Pasquale Di (2022) Gravitational waves from neutrino mass genesis. Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity", Corfu, Greece, Corfu, Greece. 29 Aug - 09 Oct 2021. (In Press) (doi:10.48550/arXiv.2205.05744).

Record type: Conference or Workshop Item (Paper)

Abstract

The discovery of gravitational waves opens new opportunities to test BSM physics. In particular, the production of a stochastic background of primordial gravitational waves could provide a signature of the generation of the right-right Majorana neutrino mass term necessary, within type-I seesaw mechanism, to explain lightness of neutrinos and their mixing parameters. I will discuss the possibility that such a generation occurs during a strong first order phase transition within Majoron models [1]. As well known, this can indeed produce a stochastic background of gravitational waves. The scale of the phase transition can or cannot coincide with the seesaw scale. In the latter case a low scale phase transition, occurring in the pre-recombination era, might be tested at very low frequencies ($10^{-9}$--$10^{-6}\,{\rm Hz}$). Even though the signal can hardly reproduce the NANOGrac putative signal such new physics at low scale might help ameliorating the tensions in the $\Lambda$CDM cosmological model (e.g., the Hubble tension). I will also discuss how a phase transition might be responsible for the generation of dark matter in the form of dark neutrinos coupling to the seesaw neutrinos via Higgs induced right handed-right handed neutrino mixing [2].

Text
2205.05744v1
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More information

Accepted/In Press date: 11 May 2022
Additional Information: 19 pages, 5 figures; Proceedings of the Corfu Summer Institute 2021
Venue - Dates: Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity", Corfu, Greece, Corfu, Greece, 2021-08-29 - 2021-10-09
Keywords: hep-ph

Identifiers

Local EPrints ID: 472302
URI: http://eprints.soton.ac.uk/id/eprint/472302
PURE UUID: 32b90f2a-f515-41bb-9a7b-c8c2ccf8f194

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Date deposited: 30 Nov 2022 18:01
Last modified: 30 Nov 2022 18:01

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