Scalar and Fermion Two-component SIMP Dark Matter with an Accidental $\mathbb{Z}^{}_4$ Symmetry

Ho, Shu-Yu; Ko, Pyungwon; Lu, Chih-Ting

doi:10.48550/arxiv.2201.06856

Cited by 3 publications

(7 citation statements)

References 59 publications

(101 reference statements)

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“…The annihilation becomes very efficient Here, we set the parameter space as BP given in Eq. (35). Blue and red lines stand for λ = 0.01 and 0.1.…”

Section: Relic Densitymentioning

confidence: 99%

“…Multi-component DM refers to a situation in which two or more particles contribute to the measured DM density. This has been already studied in many BSM scenarios [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. In this article we consider a generic U (1) X model for two-component DM and discuss its phenomenological implications in…”

Section: Introductionmentioning

confidence: 99%

“…FIG. 3: Relic density of scalar (right) and fermion (right) DM as a function of DM mass for one DM candidate.Here, we set the parameter space as BP given in Eq (35)…”

mentioning

confidence: 99%

“…Left(right) panel is for fermionic(scalar) DM with M χ = 500 GeV (M N3 = 500 GeV) and λ = 0.1. The other parameters are fixed as BP given in Eq (35)…”

mentioning

confidence: 99%

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Two-component scalar and fermionic dark matter candidates in a generic U$(1)_X$ model

Das,

Gola,

Mandal

et al. 2022

Preprint

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We consider a U (1)X ⊗ Z2 ⊗ Z 2 extension of the Standard Model (SM), where the U (1)X charge of an SM field is given by a linear combination of its hypercharge and B−L number. Apart from the SM particle content, the model contains three right-handed neutrinos (RHNs) N i R and two scalars Φ, χ, all singlets under the SM gauge group but charged under U (1)X gauge group. Two of these additional fields, fermion N 3 R is odd under Z2 and scalar χ is odd under Z 2 symmetry. Thus both χ and N 3 R contribute to the observed dark matter relic density, leading to two-component dark matter candidates. We study in detail its dark matter properties such as relic density and direct detection taking into account the constraints coming from collider studies. We find that in our model, there can be possible annihilation of one Dark Matter (DM) into the other, which may potentially alter the relic density in a significant way.

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“…The annihilation becomes very efficient Here, we set the parameter space as BP given in Eq. (35). Blue and red lines stand for λ = 0.01 and 0.1.…”

Section: Relic Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two-component scalar and fermionic dark matter candidates in a generic U$(1)_X$ model

Das,

Gola,

Mandal

et al. 2022

Preprint

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show abstract

“…Recent studies on multi-component DM scenarios include Refs. [42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60].…”

Section: Introductionmentioning

confidence: 99%

A Two-Component Dark Matter Model and its Associated Gravitational Waves

Costa,

Khan,

Kim

2022

Preprint

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We consider an extension of the Standard Model that accounts for the muon g − 2 tension and neutrino masses and study in detail dark matter phenomenology. The model under consideration includes a WIMP and a FIMP scalar dark matter candidates and thus gives rise to two-component dark matter scenarios. We discuss different regimes and mechanisms of production, including the novel freeze-in semi-production, and show that the WIMP and FIMP together compose the observed relic density today. The presence of the extra scalar fields allows phase transitions of the first order. We examine the evolution of the vacuum state and discuss stochastic gravitational wave signals associated with the first-order phase transition. We show that the gravitational wave signals may be probed by future gravitational wave experiments which may serve as a complementary detection signal.

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Singlet Dirac dark matter streamlined

Yaguna,

Zapata

2024

J. Cosmol. Astropart. Phys.

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We propose a new and compact realization of singlet Dirac dark matter within the WIMP framework. Our model replaces the standard Z 2 stabilizing symmetry with a Z 6, and uses spontaneous symmetry breaking to generate the dark matter mass, resulting in a much simplified scenario for Dirac dark matter. Concretely, we extend the Standard Model (SM) with just two new particles, a Dirac fermion (the dark matter) and a real scalar, both charged under the Z 6 symmetry. After acquiring a vacuum expectation value, the scalar gives mass to the dark matter and mixes with the Higgs boson, providing the link between the dark sector and the SM particles. With only four free parameters, this new model is extremely simple and predictive. We study the dark matter density as a function of the model's free parameters and use a likelihood approach to determine its viable parameter space. Our results demonstrate that the dark matter mass can be as large as 6 TeV while remaining consistent with all known theoretical and experimental bounds. In addition, a large fraction of viable models turns out to lie within the sensitivity of future direct detection experiments, furnishing a promising way to test this appealing scenario.

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Scalar and Fermion Two-component SIMP Dark Matter with an Accidental $\mathbb{Z}^{}_4$ Symmetry

Cited by 3 publications

References 59 publications

Two-component scalar and fermionic dark matter candidates in a generic U$(1)_X$ model

Two-component scalar and fermionic dark matter candidates in a generic U$(1)_X$ model

A Two-Component Dark Matter Model and its Associated Gravitational Waves

Singlet Dirac dark matter streamlined

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