Multipartite interacting scalar dark matter in the light of updated LUX data

We propose a model for radiatively generating the hierarchy of the Standard Model (SM) fermion masses: tree-level top quark mass; 1-loop bottom, charm, tau and muon masses; 2-loop masses for the light up, down and strange quarks as well as for the electron; and 4-loop masses for the light active neutrinos. Our model is based on a softlybroken S 3 × Z 2 discrete symmetry. Its scalar sector consists only of one SM Higgs doublet and three electrically neutral SM-singlet scalars. We do not need to invoke either electrically charged scalar fields, or an extra SU 2L scalar doublet, or the spontaneous breaking of the discrete group, which are typical for other radiative models in the literature. The model features a viable scalar dark matter candidate.

“…[17], which corresponds to a typical freeze-out temperature. We assume that our DM candidate η annihilates mainly into W W , ZZ, tt, bb and hh, with annihilation cross sections [18]:…”

Section: Jhep02(2017)125 3 Model Phenomenologymentioning

confidence: 99%

Radiatively generated hierarchy of lepton and quark masses

Hernández

Kovalenko

Schmidt

2017

“…Non observation of DM in direct search experiments like LUX [25], XENON 1T [25][26][27], Panda X [28] put a stringent bound on this model (with mass below 1 TeV getting disallowed) due to its prediction of large spin independent (SI) direct search cross section. As an alternative, multi-component DM scenarios [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] are proposed where DM-DM interactions (see for example, [39,40]) play an important role to evade direct search bound.Such an attempt was made in [39], where two singlet scalars serve as two DM components, that satisfy required DM constraints. However, the framework is unable to accommodate the low mass region corresponding to both the DM's masses, simultaneously below 500 GeV, to satisfy DM direct search bounds.…”

Section: Introductionmentioning

confidence: 99%

Two component dark matter with inert Higgs doublet: neutrino mass, high scale validity and collider searches

Bhattacharya

Ghosh

Saha

et al. 2020

Self Cite

The idea of this work is to investigate the constraints on the dark matter (DM) allowed parameter space from high scale validity (absolute stability of Higgs vacuum and perturbativity) in presence of multi particle dark sector and heavy right handed neutrinos to address correct neutrino mass. We illustrate a simple two component DM model, consisting of one inert SU (2) L scalar doublet and a scalar singlet, both stabilised by additional Z 2 ×Z 2 symmetry, which also aid to vacuum stability. We demonstrate DM-DM interaction helps achieving a large allowed parameter space for both the DM components by evading direct search bound. High scale validity puts further constraints on the model, for example, on the mass splitting between the charged and neutral component of inert doublet, which has important implication to its leptonic signature(s) at the Large Hadron Collider (LHC).

“…T f , where T f is the freeze out temperature. Relic density of ψ 1 one can approximately expressed as [81]:…”

Section: E Neutrino Massmentioning

confidence: 99%

Flavoured gauge extension of singlet-doublet fermionic dark matter: neutrino mass, high scale validity and collider signatures

Barman

Borah

Ghosh

et al. 2019

Self Cite

We propose an Abelian gauged version of the singlet-doublet fermionic dark matter (DM) model where DM, combination of a vector like fermion doublet and a fermion singlet, is naturally stabilised by the gauge symmetry without requiring any ad-hoc discrete symmetries. In order to have good detection prospects at collider experiments like the large hadron collider (LHC) and enlarged parameter space for low mass DM, we consider the additional gauge symmetry to be based on the quantum B − 3L τ where the restriction to third generation of leptons is chosen to have weaker bounds from the LHC on the corresponding gauge boson. The triangle anomalies arising in this model can be can cancelled by including a right handed neutrino which takes part in generating light neutrino masses through type I seesaw mechanism. Apart from DM, collider prospects and light neutrino masses, the model also offers high scale validity giving rise to a stable electroweak vacuum and perturbative couplings all the way up to the Planck scale. We constrain our model parameters from these requirements as well as existing relevant constraints related to DM and colliders. * bb1988@iitg.ac.in † dborah@iitg.ac.in ‡ Apart from DM, neutrino and collider prospects, the model comes up with additional advantage of providing a solution to the metastable nature of electroweak vacuum [47-54]. The negative fermionic contribution (primarily due to top quark and VLFs) to the renormalisation group (RG) running of the Higgs quartic coupling is compensated by respective contributions from additional scalars in the model 2 . In particular, the constraints from the requirement of vacuum stability restricts the gauge coupling of TeV scale B − 3L τ gauge symmetry to g B−3Lτ < ∼ 0.25 and SM Higgs coupling with VLF to Y < ∼ 0.3. For such couplings, the model also remains perturbative all the way upto the Planck scale. This paper is organised as follows: In section II we have introduced the new particles in our model and their interaction Lagrangian. In section III we have discussed the constraints on the model parameters arising from stability, unitarity and perturbativity of the scalar potential, electroweak precision observables, LHC searches and generation of light neutrino mass requirements. The details of the parameter space scan for the DM phenomenology is elaborated in section IV where in subsection IV A we have illustrated the relic density allowed parameter space and in subsection IV B direct search is discussed. The high scale validity and perturbativity of the model is elaborated in section V, where we have also chosen some of the benchmark points satisfying all relevant constraints in order to perform the collider analysis. The collider signatures of the model, along with discovery potential in the LHC is thoroughly explained in section VI. Finally in section VII we have concluded and summarised our findings. II. THE MODEL: FIELDS AND INTERACTIONSWe first tabulate all the particles of the model in table I with their corresponding gauge charges.On top of the fam...