Work

Neutrino masses and phenomenology in N -naturalness

Year: 2025

Type: article

Abstract: In this paper, it is shown that N -naturalness scenarios have an intrinsic mechanism to suppress neutrino masses. As in other infrared neutrino mass models like extra-dimensional theories or many species theories, the large number of mixing partners is responsible for the neutrino mass suppression. It is shown how neutrino mass matrices arise in N -naturalness models, and the resulting neutrino mixing is analyzed. The first result is that a totally democratic coupling among the different sectors like in the original models is already ruled out by the fact that neutrinos are not massless. In the case where the sector couplings deviate from the intersector ones a tower of additional neutrino mass eigenstates appears whose difference between the squared masses, Δ m i j 2 , is determined fully by the theory. The resulting phenomenology of such a tower is investigated, and the unique signals in neutrino oscillation experiments, neutrino mass measurements, and neutrinoless double beta decay experiments are discussed. This opens the door for terrestrial tests of N -naturalness whose phenomenology was so far focused on cosmology.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/tg33-c6bq

Author: Manuel Ettengruber

Institutions: Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Institut de Physique Théorique

Language: English

Topic: Neutrino Physics Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Agence Nationale de la Recherche

Award: Early Universe Explanations of the Higgs Boson Mass