New viable region of an inert Higgs doublet dark matter model with scotogenic extension

Borah, Debasish; Gupta, Aritra

doi:10.1103/physrevd.96.115012

Cited by 45 publications

(57 citation statements)

References 83 publications

(103 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to electroweak gauge interactions, the DM in this model can not be of purely non-thermal origin. However, it can receive non-thermal contribution from the decay of heavier particles after it freezes out, similar to the recent works [34,35]. In such scenarios, the thermally under-abundant DM can satisfy the correct relic abundance criteria due to the late non-thermal contributions.…”

Section: Introductionsupporting

confidence: 72%

“…The mass of Φ 0 3 in both the benchmark points given in table 4 falls in the mass regime 80 GeV ď M Φ 0 3 ď 500 GeV where scalar doublet DM fails to give rise to correct thermal relic as is well known from earlier studies on Z 2 odd scalar doublet dark matter. The role of non-thermal contribution in filling this deficit was discussed in earlier work [34].…”

Section: Model-ii: Freeze-out + Freeze-inmentioning

confidence: 80%

“…Being gauge singlet, its non-thermal nature is dictated by its tiny coupling with the SM leptons and Z 2 odd scalar doublet. While such tiny coupling results in vanishingly small lightest neutrino mass [34], the abundance of DM is generated from decay of the Z 2 odd scalar doublet, the NLSP in this case. While the correct DM relic is obtained by suitable choices of DM, NLSP masses and their coupling, it was found that the model can not explain the AAEs.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Connecting ANITA anomalous events to a nonthermal dark matter scenario

et al. 2020

Self Cite

View full text Add to dashboard Cite

The ANtarctic Impulsive Transient Antenna (ANITA) collaboration has observed two EeVenergy, upward going events originating from below the horizon. As no standard model (SM) particles, propagating through the earth at such energy and exit angles, can give rise to the required survival probability for the observed events, several beyond standard model (BSM) proposals have come up. We propose a scenario where a Z 2 odd sector is responsible for such anomalous events. The next to lightest Z 2 odd particle or the next to lightest stable particle (NLSP), created from ultra high energy neutrino interactions with nucleons, can pass through the earth and then decay into the lightest Z 2 odd particle or the lightest stable particle (LSP) and a tau lepton. The long lived nature of the NLSP requires its coupling with the LSP to be very small, keeping the LSP out of thermal equilibrium in the early universe. The LSP can then be a non-thermal dark matter while the tau leptons produced from NLSP decay after passing through earth can explain the ANITA events. We first show that a purely non-thermal dark matter scenario can not give rise to the required event rates while a hybrid scenario where dark matter can have both thermal as well non-thermal contribution to its relic abundance, serves the purpose. * dborah@iitg.ac.in

show abstract

Section: Introductionsupporting

confidence: 72%

Section: Model-ii: Freeze-out + Freeze-inmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Connecting ANITA anomalous events to a nonthermal dark matter scenario

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…In principle, one faces two options. DM can either be fermionic and consist of the lightest RHN N 1 [25][26][27] or it can be bosonic and consist of the lightest neutral component in the scalar η doublet [28][29][30][31][32][33][34][35][36]. In the former case, the DM relic density is sensitive to the neutrino Yukawa couplings, while in the latter case, it mostly depends on the scalar and gauge interactions of the particles in the η multiplet.…”

mentioning

confidence: 99%

Low-scale leptogenesis in the scotogenic neutrino mass model

2018

View full text Add to dashboard Cite

The scotogenic model proposed by Ernest Ma represents an attractive and minimal example for the generation of small Standard Model neutrino masses via radiative corrections in the dark matter sector. In this paper, we demonstrate that, in addition to neutrino masses and dark matter, the scotogenic model also allows to explain the baryon asymmetry of the Universe via low-scale leptogenesis. First, we consider the case of two right-handed neutrinos (RHNs) N 1;2 , for which we provide an analytical argument why it is impossible to push the RHN mass scale below M min 1 ∼ 10 10 GeV, which is identical to the value in standard thermal leptogenesis in the type-I seesaw scenario with the same washout strength. Then, we present a detailed study of the three-RHN case based on both an analytical and a numerical analysis. In the case of three RHNs, we obtain a lower bound on the N 1 mass of around 10 TeV. Remarkably enough, successful low-scale leptogenesis can be achieved without any degeneracy in the RHN mass spectrum. The only necessary condition is a suppression in the N 1 Yukawa couplings, which results in suppressed washout and a small active neutrino mass of around 10 −12 eV. This leads to the fascinating realization that low-scale leptogenesis in the scotogenic model can be tested in experiments that aim at measuring the absolute neutrino mass scale.

show abstract

“…The Higgs triplet couplings to the gauge bosons can be obtained from the ∆ kinetic term shown in Eq. (27), where the covariant derivation can be found in Eq. (28).…”

Section: Appendix B Higgs Triplet Gauge Couplingmentioning

confidence: 99%

Radiatively scotogenic type-II seesaw and a relevant phenomenological analysis

Chen

Nomura²

2019

J. High Energ. Phys.

View full text Add to dashboard Cite

When a small vacuum expectation value of Higgs triplet (v ∆ ) in the type-II seesaw model is required to explain neutrino oscillation data, a fine-tuning issue occurs on the mass-dimension lepton-number-violation (LNV) scalar coupling. Using the scotogenic approach, we investigate how a small LNV term is arisen through a radiative correction when an Z 2 -odd vector-like lepton (X) and an Z 2 -odd right-handed Majorana lepton (N ) are introduced to the type-II seesaw model.Due to the dark matter (DM) direct detection constraints, the available DM candidate is the righthanded Majorana particle, whose mass depends on and is close to the m X parameter. Combing the constraints from the DM measurements, the h → γγ decay, and the oblique T -parameter, it is found that the preferred range of v ∆ is approximately in the region of 10 −5 − 10 −4 GeV; the mass difference between the doubly and the singly charged Higgs is less than 50 GeV, and the influence on the h → Zγ is not significant. Using the constrained parameters, we analyze the decays of each Higgs triplet scalar in detail, including the possible three-body decays when the kinematic condition is allowed. It is found that with the exception of doubly charged Higgs, scalar mixing effects play an important role in the Higgs triplet two-body decays when the scalar masses are near-degenerate. In the non-degenerate mass region, the branching ratios of the Higgs triplet decays are dominated by the three-body decays.

show abstract

New viable region of an inert Higgs doublet dark matter model with scotogenic extension

Cited by 45 publications

References 83 publications

Connecting ANITA anomalous events to a nonthermal dark matter scenario

Connecting ANITA anomalous events to a nonthermal dark matter scenario

Low-scale leptogenesis in the scotogenic neutrino mass model

Radiatively scotogenic type-II seesaw and a relevant phenomenological analysis

Contact Info

Product

Resources

About