Radiative double inverse seesaw and dark matter in an alternative gauged U(1)B−L model
Abstract
We propose a concrete theoretical framework for the double inverse seesaw mechanism within an alternative gauged U(1)B−L model, where the tiny neutrino masses emerge radiatively at the loop level in accordance with the 't Hooft naturalness criterion. By assigning non-universal B−L charges of $(-4, -4, 5)$ to the right-handed neutrinos, we introduce vector-like fermions and two inert singlet scalars that circulate in the loop to generate the required mass terms. The spontaneous breaking of the U(1)B−L symmetry leaves a remnant Z2 symmetry, which naturally stabilizes these new particles as dark matter (DM) candidates. We systematically investigate both fermionic and bosonic DM scenarios, assuming their interactions are predominantly mediated by the B−L gauge boson (Z'). Our comprehensive analysis of the relic density, direct detection, and collider bounds reveals that the fermionic DM scenario is strongly favored. In contrast, the bosonic DM via the Z' portal is severely constrained and largely ruled out by the latest direct detection experiments such as LZ, PandaX-4T, and XENONnT.
Related
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BibTeX
@misc{okada2026radiative,
title = {{Radiative double inverse seesaw and dark matter in an alternative gauged $U(1)_B-L$ model}},
author = {Hiroshi Okada and Labh Singh},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.06494},
eprint = {2609.06494},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.06494},
note = {CC0},
}
RIS
TY - UNPB
TI - Radiative double inverse seesaw and dark matter in an alternative gauged U(1)_B−L model
AU - Hiroshi Okada
AU - Labh Singh
PY - 2026
DA - 2026/09/06
PB - arXiv
DO - 10.48550/arxiv.2609.06494
UR - https://arxiv.org/abs/2609.06494
AB - We propose a concrete theoretical framework for the double inverse seesaw mechanism within an alternative gauged U(1)_B−L model, where the tiny neutrino masses emerge radiatively at the loop level in accordance with the 't Hooft naturalness criterion. By assigning non-universal B−L charges of $(-4, -4, 5)$ to the right-handed neutrinos, we introduce vector-like fermions and two inert singlet scalars that circulate in the loop to generate the required mass terms. The spontaneous breaking of the U(1)_B−L symmetry leaves a remnant Z_2 symmetry, which naturally stabilizes these new particles as dark matter (DM) candidates. We systematically investigate both fermionic and bosonic DM scenarios, assuming their interactions are predominantly mediated by the B−L gauge boson (Z'). Our comprehensive analysis of the relic density, direct detection, and collider bounds reveals that the fermionic DM scenario is strongly favored. In contrast, the bosonic DM via the Z' portal is severely constrained and largely ruled out by the latest direct detection experiments such as LZ, PandaX-4T, and XENONnT.
ER -