Right-handed neutrino dark matter, neutrino masses, and non-standard cosmology in a 2HDM

Arcadi, Giorgio; Profumo, Stefano; Queiroz, Farinaldo S.; Siqueira, Clarissa

doi:10.1088/1475-7516/2020/12/030

Cited by 10 publications

(3 citation statements)

References 154 publications

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“…8. The Z, Z -mediated diagram contributions to spin independent cross are velocity suppressed and hence remain within the experimental bounds [63].…”

Section: Direct Detectionmentioning

confidence: 62%

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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“…8. The Z, Z -mediated diagram contributions to spin independent cross are velocity suppressed and hence remain within the experimental bounds [63].…”

Section: Direct Detectionmentioning

confidence: 62%

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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“…There are other interesting ways to successfully untie the annihilation rate to the scattering rate which are outside the scope of secluded DM, but we refer the reader to refs. [37][38][39]. We highlight that there are several secluded DM constructions in the literature, involving dark photons [35,36,[40][41][42][43], heavy vector bosons [44][45][46] even scalar fields [47][48][49] (see [50] for other possibilities).…”

Section: Secluded Dark Matter At Tevmentioning

confidence: 93%

Present and future constraints on secluded dark matter in the Galactic Halo with TeV Gamma-ray observatories

Queiroz

Siqueira

Viana

2023

J. Cosmol. Astropart. Phys.

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The dark matter relic density may be governed by the presence of new mediators that connect the dark matter field with the Standard Model particles. When the dark matter particle mass is larger than the mediator's, the pair production of mediators is kinematically open. This setup is known in the literature as secluded dark matter. Motivated by the appearance of secluded dark matter in several model building endeavours, we investigate the sensitivity of TeV gamma-ray instruments in the Southern Hemisphere namely, H.E.S.S., CTA, and SWGO to secluded dark matter annihilating in the Galactic Halo. We exploit the complementarity aspects of these detectors to find restrictive bounds on the annihilation cross-section for different annihilation channels. In particular, for a dark matter particle mass of 2 TeV, H.E.S.S. is able to constraint 〈σv〉 ≥ 4 × 10-26 cm3 s-1 at 95% confidence level for the 4q and 4τ channel, while CTA will be sensitive to 〈σv〉 ≥ 7 × 10-27 cm3 s-1 and SWGO 〈σv〉 ≥ 6 × 10-27 cm3 s-1 for the 4τ channel, both well below the thermal relic cross-section. In fact, the combination of CTA and SWGO will be able to probe cross-sections below the thermal relic value for dark matter particles in the whole mass range between 100 GeV and 100 TeV in the 4q and 4τ channels, and between 100 GeV and ∼ 40 TeV in the 4b channel.

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“…Neutrinoless double beta decay is an important test for Physics beyond the Standard Model; the investigation of this process allows for studying the possible Majorana nature of the neutrino and the possible violation of the Leptonic quantum number [1,2]. In particular, the Seesaw models provide a mechanism to generate small neutrino masses (see, e.g., [3]); moreover, both the problem of baryogenesis [4] and some Dark Matter (DM) candidates [5][6][7] can be addressed.…”

Section: Introductionmentioning

confidence: 99%

Dark Matter Investigation Using Double Beta Decay Experiments

Nozzoli

Cernetti

2023

The 2nd Electronic Conference on Universe

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Right-handed neutrino dark matter, neutrino masses, and non-standard cosmology in a 2HDM

Cited by 10 publications

References 154 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

Present and future constraints on secluded dark matter in the Galactic Halo with TeV Gamma-ray observatories

Dark Matter Investigation Using Double Beta Decay Experiments

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