Dark matter and strong electroweak phase transition in a radiative neutrino mass model

Ahriche, Amine; Nasri, Salah

doi:10.1088/1475-7516/2013/07/035

Cited by 52 publications

(55 citation statements)

References 62 publications

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“…[5] studied the phenomenological implication of this model with two RH neutrinos, instead of just one. In [6], it was shown that in order to fit the neutrino oscillation data and be consistent with different recent experimental constraints such as lepton flavor violation (LFV), one needs to have three RH neutrinos. Somewhat similar classes of three-loop neutrino mass models have also been studied in [7,8].…”

Section: Introductionmentioning

confidence: 88%

Radiative neutrino mass model at thee−e+linear collider

2014

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We study the phenomenology of a Standard Model extension with two charged singlet scalars and three right handed neutrinos at an electron-positron collider. In this model, the neutrino mass is generated radiatively at three-loop, the lightest right handed neutrino is a good dark matter candidate, and the electroweak phase transition strongly first order as required for baryogenesis. We focus on the process e + + e − → e − µ + + Emiss, where the model contains new lepton flavor violating interactions that contribute to the missing energy. We investigate the feasibility of detecting this process at future e − e + linear colliders at different center of mass energies: ECM = 250, 350, 500 GeV, and 1 TeV. I. INTRODUCTIONThe Standard Model (SM) of elementary particle physics is very successful in explaining physics around the electroweak scale. However, despite this several questions remain to be answered such as neutrino masses and mixing [1], the nature of the dark matter (DM) [2], and the origin of the baryon asymmetry of the Universe [3]. None of these issues is successfully explained within the SM. Therefore, various extensions beyond the SM have been proposed to address these problems.In Ref.[4], Krauss, Trodden, and one of the authors in this paper, proposed an extension of the SM with two charged SU (2) L singlet scalars and one right handed (RH) neutrino field N 1 , where a Z 2 symmetry was imposed at the Lagrangian level in order to forbid the Dirac neutrino mass terms. After the breaking of the electroweak symmetry, neutrino masses are generated at three-loop, which makes their masses naturally small due to the high loop suppression. Moreover, the field N 1 is odd under Z 2 symmetry, and thus it is guaranteed to be stable, which makes it a good candidate for DM. Ref.[5] studied the phenomenological implication of this model with two RH neutrinos, instead of just one. In [6], it was shown that in order to fit the neutrino oscillation data and be consistent with different recent experimental constraints such as lepton flavor violation (LFV), one needs to have three RH neutrinos. Somewhat similar classes of three-loop neutrino mass models have also been studied in [7,8].In this work, we consider the feasibility of testing this radiative model at the next-generation electron-positron colliders [9][10][11][12] 14]. The International Linear Collider (ILC), being designed for operation at several e − e + collision energies, will be a great opportunity to anticipate detailed physics studies of our model. Among the different processes which can be studied at the ILC, we will focus here on the process e − e + → e − µ + +E miss within the allowed kinematic regions of the machine. Further dedicated studies that probe different final states are in preparation for future works [13]. Accordingly, our signal will consist of electron, anti-muon and missing energy. In the SM, the missing energy is coming just from one source E (SM) miss ≡ν e ν µ , whereas in our model, there are twelve different processes that give rise to E...

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Section: Introductionmentioning

confidence: 88%

Radiative neutrino mass model at thee−e+linear collider

2014

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“…Here, the relevant couplings are those of the Higgs doublet to the charged scalars, λ 3a , and to the neutral ones, λ 3a þ λ 4a , in the limit jλ 5 j ≪ jλ 3a;4a j. The situation may be compared to those in similar setups [56][57][58][59] where extra scalars can help bring about a strongly first-order EWPT by (i) relaxing the Higgs quartic coupling λ 1 to as small as Oð10 −4 Þ and (ii) enhancing the value of the effective potential at the wrong vacuum at the critical temperature without suppressing the ratio v c =T c , which relaxes the severe bound on the mass of the SM Higgs. The integral in Eq.…”

Section: Electroweak Phase Transitionmentioning

confidence: 99%

Effects of two inert scalar doublets on Higgs boson interactions and the electroweak phase transition

Ahriche

Faisel

et al. 2015

Phys. Rev. D

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We study some implications of the presence of two new scalar weak doublets beyond the standard model which have zero vacuum expectation values and are charged under an extra Abelian gauge symmetry. The additional gauge sector does not couple directly to standard-model particles. We investigate specifically the effects of the scalars on oblique electroweak parameters and on the interactions of the 125 GeV Higgs boson, especially its decay modes h → γγ; γZ and trilinear self-coupling, all of which will be probed with improved precision in future Higgs measurements. Moreover, we explore how the new scalars may give rise to strongly first-order electroweak phase transition and also show its correlation with sizable modifications to the Higgs trilinear self-coupling.

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“…The idea is to use the DM itself (or the dark sector particles) to make this scenario compatible with the SM higgs. A minimal extension of the SM with an extra (complex) scalar [7][8][9][10][11] or two charged singlets [12] achieves this goal, although recent data from LHC and WIMP direct detection experiments render this possibility less attractive because such a DM would have to be sub-dominant (i.e., cannot account for the total density of DM). The same applies for inert higgs extensions of the SM [13] (higher SU(2) representations were considered in [14,15]).…”

Section: Electroweak Baryogenesismentioning

confidence: 99%

Theories relating baryon asymmetry and dark matter

Morisi

Boucenna

2014

Front. Physics

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The nature of dark matter and the origin of the baryon asymmetry are two of the deepest mysteries of modern particle physics. In the absence of hints regarding a possible solution to these mysteries, many approaches have been developed to tackle them simultaneously leading to very diverse and rich models. We give a short review where we describe the general features of some of these models and an overview on the general problem. We also propose a diagrammatic notation to label the different models.

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Dark matter and strong electroweak phase transition in a radiative neutrino mass model

Cited by 52 publications

References 62 publications

Radiative neutrino mass model at thee−e+linear collider

Radiative neutrino mass model at thee−e+linear collider

Effects of two inert scalar doublets on Higgs boson interactions and the electroweak phase transition

Theories relating baryon asymmetry and dark matter

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