Radiative neutrino mass and Majorana dark matter within an inert Higgs doublet model

Ahriche, Amine; Jueid, Adil; Nasri, Salah

doi:10.1103/physrevd.97.095012

Cited by 57 publications

(44 citation statements)

References 116 publications

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“…In addition, we also skip the analysis for the signal search at the LHC, where the related discussions can be found in Refs. [52][53][54][55][56][57][58][59][60].…”

Section: Introductionmentioning

confidence: 99%

Influence of an inert charged Higgs boson on the muon g−2 and radiative neutrino masses in a scotogenic model

Chen¹,

Nomura

2019

Phys. Rev. D

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A simple extension of Ma's approach in a scotogenic model is studied for the purpose of simultaneously interpreting the neutrino data and the excess of muon anomalous magnetic moment (muon g − 2). The feasible minimal extension is to add an Z 2 -odd vector-like lepton doublet to the Ma's model. It is found that in addition to the neutrino data, the strict constraints on the relevant parameters are from the electroweak oblique parameters and the induced lepton-flavor violation processes, such as ℓ i → ℓ j γ and ℓ i → ℓ − j ℓ − j ℓ + j . Performing parameter scan, we numerically demonstrate that when the constraint conditions are satisfied, the muon g − 2 of O(10 −9 ) can be achieved, where it can be expected that with a 5σ observation, the Muon g − 2 experiment at Fermilab can observe a µ ≈ 13.31 × 10 −10 when the current experiment and the SM errors are reduced by a factor of 4 and 2, respectively. Moreover, the branching ratio of the τ → µγ decay can match the Belle II sensitivity of O(10 −9 ) with an integrated luminosity of 50 ab −1 .

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“…In addition, we also skip the analysis for the signal search at the LHC, where the related discussions can be found in Refs. [52][53][54][55][56][57][58][59][60].…”

Section: Introductionmentioning

confidence: 99%

Influence of an inert charged Higgs boson on the muon g−2 and radiative neutrino masses in a scotogenic model

Chen¹,

Nomura

2019

Phys. Rev. D

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“…We aim to study the DM phenomenology associated with the vector-like Dirac fermion N L,R here. Due to Dirac nature of the dark matter, the phenomenology associated with it is very different from the Majorana fermionic dark matter scenario [55]. It can also annihilate to SM fermions and right-handed neutrinos via t− channel scalar (S, η 0 , η + ) exchanges.…”

Section: Dark Matter Phenomenologymentioning

confidence: 99%

“…In Fig. 16 55) here N ν R is the number of massless or light right-handed neutrinos, g(T ) is the relativistic degrees of freedom at temperature T, with the well-known quantities g(T ν L dec ) = 43/4 and T ν L dec = 2.3 MeV [92]. For the following computation, we take the temperature-dependent degrees of freedom from the data listed in Table S2 of Ref.…”

Section: Left-right Asymmetrymentioning

confidence: 99%

Minimal dirac neutrino mass models from $$\hbox {U}(1)_{\mathrm{R}}$$ gauge symmetry and left–right asymmetry at colliders

2019

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In this work, we propose minimal realizations for generating Dirac neutrino masses in the context of a right-handed abelian gauge extension of the Standard Model. Utilizing only U (1) R symmetry, we address and analyze the possibilities of Dirac neutrino mass generation via (a) tree-level seesaw and (b) radiative correction at the one-loop level. One of the presented radiative models implements the attractive scotogenic model that links neutrino mass with Dark Matter (DM), where the stability of the DM is guaranteed from a residual discrete symmetry emerging from U (1) R . Since only the right-handed fermions carry non-zero charges under the U (1) R , this framework leads to sizable and distinctive Left-Right asymmetry as well as Forward-Backward asymmetry discriminating from U (1) B−L models and can be tested at the colliders.We analyze the current experimental bounds and present the discovery reach limits for the new heavy gauge boson Z at the LHC and ILC. Furthermore, we also study the associated charged lepton flavor violating processes, dark matter phenomenology and cosmological constraints of these models. * metry [30] for generating the Dirac neutrino mass [28,[31][32][33][34][35]. Both of the two possibilities are attractive and can be regarded as the minimal gauge extensions of the SM. However, the phenomenology of U (1) R model is very distinctive compared to the U (1) B−L case. In the literature, gauged U (1) B−L symmetry has been extensively studied whereas gauged U (1) R extension has received very little attention.Unlike the U (1) B−L case, in our set-up, the SM Higgs doublet is charged under this U (1) R symmetry to allow the desired Yukawa interactions to generate mass for the charged fermions, this leads to interactions with the new gauge boson that is absent in U (1) B−L model. The running of the Higgs quartic coupling gets modified due to having such interactions with the new gauge boson Z that can make the Higgs vacuum stable [36]. Due to the same reason, the SM Higgs phenomenology also gets altered [37].We show by detail analysis that despite their abelian nature, U (1) R and U (1) B−L have distinguishable phenomenology. The primary reason that leads to different features is:U (1) R gauge boson couples only to the right-handed chiral fermions, whereas U (1) B−L is chirality-universal. As a consequence, U (1) R model leads to large left-right (LR) asymmetry and also forward-backward (FB) asymmetry that can be tested in the current and future colliders that make use of the polarized initial states, such as in ILC. We also comment on the differences of our U (1) R scenario with the other U (1) R models existing in the literature. Slightly different features emerge as a result of different charge assignment of the righthanded neutrinos in our set-up for the realization of Dirac neutrino mass. In the existing U (1) R models, flavor universal charge assignment for the right-handed neutrinos are considered and neutrinos are assumed to be Majorana particles. Whereas, in our set-up, neutrinos are Dira...

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“…Also, λ 5 decides the mass splitting between A 0 , H 0 which can be constrained by dark matter direct detection limits, as studied earlier by several authors [52,59,[65][66][67][68][69][70][71][72][73].…”

Section: Scotogenic Modelmentioning

confidence: 99%

“…by preventing the usual Dirac Yukawa term LΦ 1 N involving the SM Higgs. The scalar sector of the model resembles the one in the inert Higgs doublet model (IHDM) [61], a minimal extension of the SM by a Z 2 odd scalar doublet η[48,52,59,[62][63][64][65][66][67][68][69][70][71][72][73]. The scalar potential of the model can be written as…”

mentioning

confidence: 99%

TeV scale leptogenesis with dark matter in non-standard cosmology

Mahanta

Borah

2020

J. Cosmol. Astropart. Phys.

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We study the consequence of a non-standard cosmological epoch in the early universe on the generation of baryon asymmetry through leptogenesis as well as dark matter abundance. We consider two different non-standard epochs: one where a scalar field behaving like pressure-less matter dominates the early universe, known as early matter domination (EMD) scenario while in the second scenario, the energy density of the universe is dominated by a component whose energy density red-shifts faster than radiation, known as fast expanding universe (FEU) scenario. While a radiation dominated universe is reproduced by the big bang nucleosynthesis (BBN) epoch in both the scenario, the high scale phenomena like generation of baryon asymmetry and dark matter relic get significantly affected. Adopting a minimal particle physics framework known as the scotogenic model which generates light neutrino masses at one-loop level, we find that in two specific realisations of EMD scenario, the scale of leptogenesis can be lower than that in a standard cosmological scenario. The other non-standard cosmological scenarios, on the other hand, can be constrained from the requirement of successful low scale leptogenesis and generating correct dark matter abundance simultaneously. Such a low scale scenario not only gives a unified picture of baryon asymmetry, dark matter and origin of neutrino mass but also opens up interesting possibilities for experimental detection.

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Radiative neutrino mass and Majorana dark matter within an inert Higgs doublet model

Cited by 57 publications

References 116 publications

Influence of an inert charged Higgs boson on the muon g−2 and radiative neutrino masses in a scotogenic model

Influence of an inert charged Higgs boson on the muon g−2 and radiative neutrino masses in a scotogenic model

Minimal dirac neutrino mass models from $$\hbox {U}(1)_{\mathrm{R}}$$ gauge symmetry and left–right asymmetry at colliders

TeV scale leptogenesis with dark matter in non-standard cosmology

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