Pseudo-Nambu-Goldstone dark matter from gauged U(1)B−L symmetry

Abe, Yoshihiko; Toma, Takashi; Tsumura, Koji

doi:10.1007/jhep05(2020)057

Cited by 41 publications

(57 citation statements)

References 43 publications

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“…For example, the electric dipole moment can be affected in the singlet-doublet DM model that is one of the UV completion of the model we discussed in this paper. Pseudo-Nambu-Goldstone DM models [40][41][42][43] also predict suppressed elastic scattering processes, and the early kinetic decoupling potentially has the impact on their phenomenology.…”

Section: Discussionmentioning

confidence: 99%

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Effect of the early kinetic decoupling in a fermionic dark matter model

Abe

2020

Phys. Rev. D

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We study the effect of the early kinetic decoupling in a model of fermionic dark matter (DM) that interacts with the standard model particles only by exchanging the Higgs boson. There are two DM-Higgs couplings, namely CP-conserving and CP-violating couplings. If the mass of the DM is slightly below half of the Higgs boson mass, then the couplings are suppressed to obtain the measured value of the DM energy density by the freeze-out mechanism. In addition, the scattering processes of DM off particles in the thermal bath are suppressed by the small momentum transfer if the CP-violating DM-Higgs coupling is larger than the CP-conserving one. Due to the suppression, the temperature of the DM can differ from the temperature of the thermal bath. By solving coupled equations for the number density and temperature of the DM, we calculate the DM-Higgs couplings that reproduce the right amount of the DM relic abundance. We find that the couplings have to be larger than the one obtained without taking into account the difference in the temperatures. A consequence of the enhancement of the DM-Higgs couplings is the enhancement of the Higgs invisible decay branching ratio. The enhancement is testable at current and future collider experiments.

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Section: Discussionmentioning

confidence: 99%

“…It is easy to calculate the DM-SM fermion scattering amplitude at the tree level. The square of the scattering amplitude for χf → χf is given by 16) where N c = 3 (1) for quarks (leptons). The summation is taken for all the internal degrees of freedom for all the initial and final states.…”

Section: Modelmentioning

confidence: 99%

Effect of the early kinetic decoupling in a fermionic dark matter model

Abe

2020

Phys. Rev. D

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“…Such a situation can be circumvented if one can effectively suppress DM-nucleon scattering at zero momentum transfer without reducing DM annihilation at the freeze-out epoch. An appealing approach to achieve this is provided by Higgs-portal pseudo-Nambu-Goldstone boson (pNGB) DM models [7][8][9][10][11][12][13][14][15][16][17][18][19][20], where the DM candidate is a pNGB protected by a global symmetry which is softly broken by quadratic mass terms. The pNGB nature makes the tree-level DM-nucleon scattering amplitude vanish in the zero momentum transfer limit [7].…”

Section: Introductionmentioning

confidence: 99%

Phase transition gravitational waves from pseudo-Nambu-Goldstone dark matter and two Higgs doublets

Zhen

Cai

Jiang

et al. 2021

J. High Energ. Phys.

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We investigate the potential stochastic gravitational waves from first-order electroweak phase transitions in a model with pseudo-Nambu-Goldstone dark matter and two Higgs doublets. The dark matter candidate can naturally evade direct detection bounds, and can achieve the observed relic abundance via the thermal mechanism. Three scalar fields in the model obtain vacuum expectation values, related to phase transitions at the early Universe. We search for the parameter points that can cause first-order phase transitions, taking into account the existed experimental constraints. The resulting gravitational wave spectra are further evaluated. Some parameter points are found to induce strong gravitational wave signals, which have the opportunity to be detected in future space-based interferometer experiments LISA, Taiji, and TianQin.

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“…Fermionic DM models with pseudo-scalar couplings are examples in spin-1/2 DM models [4][5][6]. The pseudo-Nambu-Goldstone (NG) boson DM models are examples of spin-0 DM models [7][8][9][10]. In these models, the coupling itself between DM and mediator particle is not suppressed, and thus DM is thermally produced in the early universe through the annihilation into the SM particles via scalar mediator exchanges.…”

Section: Introductionmentioning

confidence: 99%

A model of electroweakly interacting non-abelian vector dark matter

Abe

Fujiwara

Hisano

et al. 2020

J. High Energ. Phys.

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We propose an electroweakly interacting spin-1 dark matter (DM) model. The electroweak gauge symmetry, SU(2)L×U(1)Y , is extended into SU(2)0×SU(2)1×SU(2)2×U(1)Y . A discrete symmetry exchanging SU(2)0 and SU(2)2 is imposed. This discrete symmetry stabilizes the DM candidate. The spin-1 DM particle (V0) and its SU(2)L partners (V±) interact with the Standard Model (SM) electroweak gauge bosons without any suppression factors. Consequently, pairs of DM particles efficiently annihilate into the SM particles in the early universe, and the measured value of the DM energy density is easily realized by the thermal freeze-out mechanism. The model also predicts a heavy vector triplet (W′± and Z′) in the visible sector. They contribute to the DM annihilation processes. The mass ratio of Z′ and V0 determines values of various couplings, and constraints on W′ and Z′ restrict regions of the parameter space that are viable for DM physics. We investigate the constraints from perturbative unitarity of scalar and gauge couplings, the Higgs signal strength, W′ search at the LHC, and DM direct detection experiments. It is found that the relic abundance of V0 explains the right amount of the DM energy density for 3 TeV $$ \underset{\sim }{<}{m}_Vo\underset{\sim }{<} $$ < ∼ m V o < ∼ 19 TeV.

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Pseudo-Nambu-Goldstone dark matter from gauged U(1)B−L symmetry

Cited by 41 publications

References 43 publications

Effect of the early kinetic decoupling in a fermionic dark matter model

Effect of the early kinetic decoupling in a fermionic dark matter model

Phase transition gravitational waves from pseudo-Nambu-Goldstone dark matter and two Higgs doublets

A model of electroweakly interacting non-abelian vector dark matter

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