Scale-Invariant Three-Component Dark Matter and Gravitational Wave Signals
Abstract
We study a classically scale-invariant extension of the Standard Model (SM) with four new fields in a hidden sector: a complex scalar S, two Dirac fermions ψ1,2 and the gauge boson Vμ of a new U(1)D symmetry. The scalar S couples to the SM through the Higgs portal. We identify regions of parameter space in which Vμ, ψ1 and ψ2 are all stable, giving a three-component dark matter (DM) scenario. The model is classically scale invariant, and the electroweak symmetry breaks because of the loop effects. We impose the observed relic density and current direct detection bounds, and then study the finite temperature effective potential. For a benchmark point, we find a first-order phase transition and compute the resulting gravitational wave (GW) spectrum, which we compare with the projected sensitivities of space-based interferometers. Although the viable parameter space is small, it can be probed by future experiments.
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BibTeX
@misc{hosseini2026scaleinvariant,
title = {{Scale-Invariant Three-Component Dark Matter and Gravitational Wave Signals}},
author = {Mojtaba Hosseini and Rouzbeh Rouzbehi},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.07509},
eprint = {2611.07509},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.07509},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Scale-Invariant Three-Component Dark Matter and Gravitational Wave Signals
AU - Mojtaba Hosseini
AU - Rouzbeh Rouzbehi
PY - 2026
DA - 2026/11/05
PB - arXiv
DO - 10.48550/arxiv.2611.07509
UR - https://arxiv.org/abs/2611.07509
AB - We study a classically scale-invariant extension of the Standard Model (SM) with four new fields in a hidden sector: a complex scalar S, two Dirac fermions ψ^1,2 and the gauge boson V_μ of a new U(1)_D symmetry. The scalar S couples to the SM through the Higgs portal. We identify regions of parameter space in which V_μ, ψ^1 and ψ^2 are all stable, giving a three-component dark matter (DM) scenario. The model is classically scale invariant, and the electroweak symmetry breaks because of the loop effects. We impose the observed relic density and current direct detection bounds, and then study the finite temperature effective potential. For a benchmark point, we find a first-order phase transition and compute the resulting gravitational wave (GW) spectrum, which we compare with the projected sensitivities of space-based interferometers. Although the viable parameter space is small, it can be probed by future experiments.
ER -