Type-3/2 seesaw mechanism

Demir, Durmuş Ali and Karahan, Canan and Sargın, Ozan (2021) Type-3/2 seesaw mechanism. Physical Review D, 104 (7). ISSN 2470-0010 (Print) 2470-0029 (Online)

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The type-I seesaw mechanism provides a natural explanation for tiny neutrino masses. The right-handed neutrino masses it requires are, however, too large to keep the Higgs boson mass at its measured value. We show that vector spinors, singlet leptons that are like right-handed neutrinos, generate tiny neutrino masses naturally through the exchange of spin-1/2 and spin-3/2 components. This one-step seesaw mechanism, which we call the type-3/2 seesaw, keeps the Higgs boson mass unchanged at one loop and gives cause therefore to no fine-tuning problem. If the on-shell vector spinor is a pure spin-3/2 particle, then it becomes a potential candidate for hidden dark matter which gets diluted due only to the expansion of the Universe. The type-3/2 seesaw provides a natural framework for the neutrino, Higgs boson, and dark matter sectors, with overall agreement with current experiments and observations. © 2021 authors.
Item Type: Article
Subjects: Q Science > QC Physics > QC170 Atomic physics. Quantum theory.
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Depositing User: Durmuş Ali Demir
Date Deposited: 08 Feb 2022 15:41
Last Modified: 27 Aug 2022 15:24
URI: https://research.sabanciuniv.edu/id/eprint/42626

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