An update on the two singlet dark matter model

Basak, Tanushree; Coleppa, Baradhwaj; Loho, Kousik

doi:10.1007/jhep06(2021)104

Cited by 9 publications

(3 citation statements)

References 55 publications

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“…Experiments related with dark matter direct detection such as CDMS II [58], XENON100 [59], XENON1T [60], LUX [61] have been searching for the signal of the interaction of DM with nucleon. In our model, quarks do not couple with Z but only with two Higgs particles and these interactions can be concluded by the scattering of dark matter particle off a SM fermion f via the t-channel exchange of the two Higgs particles, which is similar with the two singlet scalar model [62,63]. The effective lagrangian for dark matter-quark elastic scattering can be given by :…”

Section: Direct Detectionmentioning

confidence: 99%

Scalar dark matter and Muon $g-2$ in a $U(1)_{L_μ-L_τ}$ model

Qi,

Yang,

Liu

et al. 2021

Preprint

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We consider a simple scalar dark matter model within the frame of gauged Lµ − Lτ symmetry. A gauge boson Z as well as two scalar fields S and Φ are introduced to the Standard Model (SM). S and Φ are SM singlet but both with U (1)L µ−Lτ charge. The real component and imaginary component of S can acquire different masses after spontaneously symmetry breaking, and the lighter one can play the role of dark matter which is stabilized by the residual Z2 symmetry. A viable parameter space is considered to discuss the possibility of light dark matter as well as co-annihilation case, and we present current (g − 2)µ anomaly, Higgs invisible decay, dark matter relic density as well as direct detection constriants on the parameter space.

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Section: Direct Detectionmentioning

confidence: 99%

Scalar dark matter and Muon $g-2$ in a $U(1)_{L_μ-L_τ}$ model

Qi,

Yang,

Liu

et al. 2021

Preprint

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“…By running the couplings at high scale we study the hierarchy problem and the effect of extra scalars on the Veltman conditions while respecting the stability of the extended Higgs potential. There can be found various scenarios with the inclusion of two real singlet scalars emphasising on the dark matter phenomenology [38][39][40][41][42][43][44][45][46]. As experimental bounds, we consider strong constraints from observed relic density granted by Planck and WMAP observations, bounds from direct detection experiments XENON1t and LUX and the invisible Higgs decay width.…”

Section: Introductionmentioning

confidence: 99%

The hierarchy problem and the vacuum stability in two-scalar dark matter model

Zohre¹,

Ghorbani²,

Ghorbani³

2022

Preprint

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We consider an extension to the Standard Model (SM) with two extra real singlet scalars which both interact with the Higgs particle in the SM and one of the scalars is taken as the dark matter (DM) candidate. We show that the model successfully explains the relic abundance of the DM in the universe and evades the strong bounds from direct detection experiments while respecting the perturbativity and the vacuum stability conditions. In addition, we study the hierarchy problem within the Veltman approach by solving the renormalization group equations at one-loop. It is shown that the addition of the real singlet scalars contributes to the Veltman parameters which in turn results in satisfying the Veltman conditions much lower than the Planck scale Λ Pl . Therefore, the presence of the extra scalars not only reduce the fine-tuning problem of the Higgs mass to a given scale Λ ≪ Λ Pl , but also the singlet scalars do not receive large corrections up to the scale Λ. For the case of two-scalar DM model we find Λ = 10 8 GeV.

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“…The model with a scalar singlet DM and a scalar singlet mediator is nothing but a two-scalar-singlet extension of the SM with the Z 2 symmetry to make the DM stable, and such a model is discussed in Ref. [17][18][19][20][21][22]. In these studies, they suppose that there is another Z 2 symmetry called Z 2 symmetry under which the mediator particle is odd and other particles are even, and the mediator field has a vacuum expectation value after symmetry breaking.…”

Section: Introductionmentioning

confidence: 99%

Is light thermal scalar dark matter possible?

Hara,

Kanemura,

Katayose

2021

Preprint

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We study a light thermal scalar dark matter (DM) model with a light scalar mediator mixed with the standard model Higgs boson, including both the theoretical bounds and the current experimental constraints. The thermal scalar DM with the mass below a few GeV is usually strongly constrained by the observation of CMB and/or indirect detection experiments because the leading annihilation mode is s-wave. However, we find that two parameter regions still remain, which are the resonant annihilation region and the forbidden annihilation region. For the both cases, the higher partial waves dominantly contribute to the annihilation at the freezeout era, and the constraint from the cosmological observation is weaker. We consider typical cases of these regions quantitatively, mainly focusing on the mixing angle and the mass of the new particles. Finally, we also discuss the testability of this model at future experiments.

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An update on the two singlet dark matter model

Abstract: We revisit the two real singlet extension of the Standard Model with a $$ {Z}_2\times {Z}_2^{\prime } $$ Z 2 × Z 2 ′ symmetry. One of the singlet scalars S2, by virtue of an unbroken $$ {Z}_2^{\prime } $$ Z 2 ′ … Show more

Cited by 9 publications

References 55 publications

Scalar dark matter and Muon $g-2$ in a $U(1)_{L_μ-L_τ}$ model

Scalar dark matter and Muon $g-2$ in a $U(1)_{L_μ-L_τ}$ model

The hierarchy problem and the vacuum stability in two-scalar dark matter model

Is light thermal scalar dark matter possible?

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