Fermion singlet dark matter in a pseudoscalar dark matter portal

Sáez, Bastián Díaz; Escalona, Patricio; Norero, Sebastián; Zerwekh, Alfonso R.

doi:10.1007/jhep10(2021)233

Cited by 14 publications

(9 citation statements)

References 83 publications

(106 reference statements)

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“…There are a couple of factors that make the R N N →X are suppressed by the two-loop factor (4π) 8 . Firstly, we have to choose strong couplings, λ 3 y N ∼ O (10), to satisfy the relic abundance of DM. Secondly, the SIMP conditions suggest that c XN 0.…”

Section: Simp Conditions: Thermalization and Annihilationmentioning

confidence: 99%

“…Lastly, there is a possibility that the universe contains more than one kind of DM just like the visible world exist many stable particles such as the electron, proton, and neutrinos. Indeed, there are many efforts along this direction [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…As mentioned in the previous section, the S particle can also decay into three X particles if it is kinematically allowed. However, since we are interested in the mass region where m S 3m X , the decay rate of S → X X X is then suppressed by phase space even if λ 3 ∼ O(10). Thus, we ignore this decay mode in our numerical study.…”

mentioning

confidence: 99%

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Scalar and fermion two-component SIMP dark matter with an accidental ℤ4 symmetry

2022

J. High Energ. Phys.

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In this paper, we construct for the first time a two-component strongly interacting massive particles (SIMP) dark matter (DM) model, where a complex scalar and a vector-like fermion play the role of the SIMP DM candidates. These two particles are stable due to an accidental ℤ4 symmetry after the breaking of a U(1)D gauge symmetry. By introducing one extra complex scalar as a mediator between the SIMP particles, this model can have 3 → 2 processes that determine the DM relic density. On the other hand, the SIMP DM particles can maintain kinetic equilibrium with the thermal bath until the DM freeze-out temperature via the U(1)D gauge couplings. Most importantly, we find an unavoidable two-loop induced 2 → 2 process tightly connecting to the 3 → 2 process that would redistribute the SIMP DM number densities after the chemical freeze-out of DM. Moreover, this redistribution would significantly modify the predictions of the self-interacting cross section of DM compared with other SIMP models. It is crucial to include the two-loop induced 2 → 2 annihilations to obtain the correct DM phenomenology.

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Section: Simp Conditions: Thermalization and Annihilationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Scalar and fermion two-component SIMP dark matter with an accidental ℤ4 symmetry

2022

J. High Energ. Phys.

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“…We have reported a preliminary study on this model in [118,119]. During completion of this work, an alternative, partly overlapping, analysis of the same model (without the study of the loop effects) appeared in [120].…”

Section: Odd Vector Mediators ( Fmentioning

confidence: 99%

Minimal Consistent Dark Matter models for systematic experimental characterisation: Fermion Dark Matter

Belyaev¹,

Cacciapaglia²,

Locke³

et al. 2022

Preprint

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The search for a Dark Matter particle is the new grail and hard-sought nirvana of the particle physics community. From the theoretical side, it is the main challenge to provide a consistent and model-independent tool for comparing the bounds and reach of the diverse experiments. We propose a first complete classification of minimal consistent Dark Matter models, which provides the missing link between experiments and top-down models. Consistency is achieved by imposing renormalisability and invariance under the full Standard Model symmetries. We apply this paradigm to fermionic Dark multiplets with up to one mediator. We also reconsider the one-loop contributions to direct detection, including the relevant effect of (small) mass splits in the Dark multiplet. Our work highlights the presence of unexplored viable models, and paves the way for the ultimate systematic hunt for the Dark Matter particle.

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“…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%

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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Fermion singlet dark matter in a pseudoscalar dark matter portal

Cited by 14 publications

References 83 publications

Scalar and fermion two-component SIMP dark matter with an accidental ℤ4 symmetry

Scalar and fermion two-component SIMP dark matter with an accidental ℤ4 symmetry

Minimal Consistent Dark Matter models for systematic experimental characterisation: Fermion Dark Matter

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

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