Impact of first-order phase transitions on dark matter production in the scotogenic model

Shibuya, Hiroto; Toma, Takashi

doi:10.1007/jhep11(2022)064

Cited by 6 publications

(1 citation statement)

References 77 publications

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“…Extended Higgs models also allow for multi-step phase transitions in the early Universe. This possibility that was already described by Weinberg in [38], was later analyzed, within specific models, in [39][40][41][42][43][44][45][46][47]. A sequence of phase transitions could lead to the remarkable opportunity of a charge-breaking (CB) phase at intermediate temperatures.…”

Section: Introductionmentioning

confidence: 93%

Intermediate charge-breaking phases and symmetry non-restoration in the 2-Higgs-Doublet Model

Aoki,

Biermann,

Borschensky

et al. 2024

J. High Energ. Phys.

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The Higgs potentials of extended Higgs sectors exhibit a complex and interesting vacuum structure. When travelling back in time, i.e. going to higher temperatures, the structure may change and exhibit interesting phase patterns and sequences of phases related to the respective minima of the potential. The investigation of the vacuum structure can give us indirect insights in beyond-Standard-Model physics and the evolution of the Universe. In this paper, we investigate the possibility of an intermediate charge-breaking (CB) phase in the 2-Higgs-Doublet Model (2HDM) type I. The existence has been reported previously by using a simple potential setup. We here confirm that the intermediate CB phase can still exist when using the one-loop corrected effective potential including thermal masses. We discuss its features and the relation with SU(2) symmetry (non-)restoration as well as its consistency with the current experimental data. Lastly, we show for some selected benchmark points the rich and interesting phase patterns and sequences that the 2HDM can undergo during its evolution from the early Universe to today’s electroweak vacuum.

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Section: Introductionmentioning

confidence: 93%

Intermediate charge-breaking phases and symmetry non-restoration in the 2-Higgs-Doublet Model

Aoki,

Biermann,

Borschensky

et al. 2024

J. High Energ. Phys.

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Gravitational wave signatures of a chiral fermion dark matter model

Abe,

Babu,

Kaladharan

2024

J. Cosmol. Astropart. Phys.

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Theories in which the dark matter (DM) candidate is a fermion transforming chirally under a gauge symmetry are attractive, as the gauge symmetry would protect the DM mass. In such theories, the universe would have undergone a phase transition at early times that generated the DM mass upon spontaneous breaking of the gauge symmetry. In this paper, we explore the gravitational wave signals of a simple such theory based on an SU(2)D dark sector with a dark isospin-3/2 fermion serving as the DM candidate. This is arguably the simplest chiral theory possible. The scalar sector consists of a dark isospin-3 multiple, which breaks the SU(2)D gauge symmetry and also generates the DM mass. We construct the full thermal potential of the model and identify regions of parameter space which lead to detectable gravitational wave signals, arising from a strong first-order SU(2)D phase transition, in various planned space-based interferometers, while also being consistent with dark matter relic abundance. The bulk of the parameter space exhibiting detectable gravitational wave signals in the model also has large WIMP-nucleon scattering cross sections, ℴSI, which could be probed in upcoming direct detection experiments.

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Gravitational Waves from First-Order Phase Transition in an Electroweakly Interacting Vector Dark Matter Model

Abe,

Hashino

2024

Progress of Theoretical and Experimental Physics

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We discuss gravitational waves (GWs) in an electroweakly interacting vector dark matter (DM) model. In the model, the electroweak gauge symmetry is extended to SU(2)$_0 \times$SU(2)$_1 \times$SU(2)$_2 \times$U(1)$_Y$ and spontaneously broken into SU(2)$_L \times$U(1)$_Y$ at TeV scale. The model has an exchange symmetry between SU(2)$_0$ and SU(2)$_2$. This symmetry stabilizes some massive vector bosons associated with the spontaneous symmetry breaking described above, and an electrically neutral one is a DM candidate. In a previous study, it was found that the gauge couplings of SU(2)$_0$ and SU(2)$_1$ are relatively large to explain the measured value of the DM energy density via the freeze-out mechanism. With the large gauge couplings, the gauge bosons potentially have a sizable effect on the scalar potential. In this paper, we focus on the phase transition of SU(2)$_0 \times$SU(2)$_1 \times$SU(2)$_2 \rightarrow$ SU(2)$_L$. We calculate the effective potential at finite temperature and find that the phase transition is first-order and strong in a wide range of the parameter space. The strong first-order phase transition generates GWs. We calculate the GW spectrum and find that it will be possible to detect the GWs predicted in the model by future space-based GW interferometers. We explore the regions of the parameter space probed by the GW detection. We find that the GW detection can probe the region where the mass of $h^{\prime }$, a CP-even scalar in the model, is a few TeV.

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Impact of first-order phase transitions on dark matter production in the scotogenic model

Cited by 6 publications

References 77 publications

Intermediate charge-breaking phases and symmetry non-restoration in the 2-Higgs-Doublet Model

Intermediate charge-breaking phases and symmetry non-restoration in the 2-Higgs-Doublet Model

Gravitational wave signatures of a chiral fermion dark matter model

Gravitational Waves from First-Order Phase Transition in an Electroweakly Interacting Vector Dark Matter Model

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