Multicomponent dark matter in extended U(1)B−L: neutrino mass and high scale validity

Bhattacharya, Subhaditya; Chakrabarty, Nabarun; Roshan, Rishav; Sil, Arunansu

doi:10.1088/1475-7516/2020/04/013

Cited by 34 publications

(35 citation statements)

References 124 publications

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“…Such null results have not only motivated the studies of beyond thermal WIMP paradigm but also a richer DM sector consisting of multiple DM components. Some recent proposals for multi-component DM can be found in [60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94] and references therein. As several of these works pointed out, apart from having larger allowed region of parameter space due to freedom of tuning relative DM abundances, such multi-component DM scenarios often offer complementary probes at experiments spanning out to different frontiers.…”

Section: Introductionmentioning

confidence: 99%

Connecting light dirac neutrinos to a multi-component dark matter scenario in gauged $$B-L$$ model

Nanda

Borah

2020

Eur. Phys. J. C

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We propose a new gauged B − L extension of the standard model where light neutrinos are of Dirac type, naturally acquiring sub-eV mass after electroweak symmetry breaking, without any additional global symmetries. This is realised by choosing a different B − L charge for right handed neutrinos than the usual −1 so that the Dirac Yukawa coupling involves an additional neutrinophilic scalar doublet instead of the usual Higgs doublet. The model can be made anomaly free by considering four additional chiral fermions which give rise to two massive Dirac fermions by appropriate choice of singlet scalars. The choice of scalars not only helps in achieving the desired particle mass spectra via spontaneous symmetry breaking, but also leaves a remnant Z 2 × Z 2 symmetry to stabilise the two dark matter candidates. Apart from this interesting link between Dirac nature of light neutrinos and multi-component dark matter sector, we also find that the dark matter parameter space is constrained mostly by the cosmological upper limit on effective relativistic degrees of freedom N eff which gets enhanced in this model due to the thermalisation of the light right handed neutrinos by virtue of their sizeable B − L gauge interactions.

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Section: Introductionmentioning

confidence: 99%

Connecting light dirac neutrinos to a multi-component dark matter scenario in gauged $$B-L$$ model

Nanda

Borah

2020

Eur. Phys. J. C

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“…One can also add an exact Z 2 symmetry to supersymmetric models, or to universal extra dimension models, or to U(1) B−L models. Besides, there are other interesting approaches [97][98][99][100][101][102][103][104][105][106][107][108][109][110][111][112]. Since the dark matter structure is enriched, such scenarios possess interesting phenomenological consequences, attracting current research.…”

Section: Introductionmentioning

confidence: 99%

Multicomponent dark matter in noncommutative B − L gauge theory

Nam

Loi

Thuy

et al. 2020

J. High Energ. Phys.

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It is shown that for a higher weak isospin symmetry, SU(P)L with P ≥ 3, the baryon minus lepton charge B − L neither commutes nor closes algebraically with SU(P)L similar to the electric charge Q, which all lead to a SU(3)C ⊗ SU(P)L ⊗ U(1)X ⊗ U(1)N gauge completion, where X and N determine Q and B − L, respectively. As a direct result, the neutrinos obtain appropriate masses via a canonical seesaw. While the version with P = 3 supplies the schemes of single-component dark matter well established in the literature, we prove in this work that the models with P ≥ 4 provide the novel scenarios of multicomponent dark matter, which contain simultaneously at least P−2 stable candidates, respectively. In this setup, the multicomponet dark matter is nontrivially unified with normal matter by gauge multiplets, and their stability is ensured by a residual gauge symmetry which is a remnant of the gauge symmetry after spontaneous symmetry breaking. The three versions with P = 4 according to the new lepton electric charges are detailedly investigated. The mass spectrum of the scalar sector is diagonalized when the scale of the U(1)N breaking is much higher than that of the usual 3-4-1 symmetry breaking. All the interactions of gauge bosons with fermions and scalars are obtained. We figure out viable parameter regimes given that the multicomponent dark matter satisfies the Planck and (in)direct detection experiments.

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“…However, it comes with the additional Dirac Yukawa couplings which contribute negatively to the RG running of the SM Higgs quartic coupling, thus aggravating the vacuum stability problem. One way to alleviate the situation is by adding extra scalars [97][98][99][100][101][102] which compensate for the destabilizing effect of the right-handed neutrinos (RHNs). Following this approach, we consider in this paper an inert 2HDM [103,104] with the addition of RHNs for seesaw mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…A variant of this model with an additional scalar singlet was considered in refs [99,102]. to obtain a multi-component DM scenario.…”

mentioning

confidence: 99%

Vacuum stability in inert higgs doublet model with right-handed neutrinos

Jangid

Bandyopadhyay

Dev³

et al. 2020

J. High Energ. Phys.

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We analyze the vacuum stability in the inert Higgs doublet extension of the Standard Model (SM), augmented by right-handed neutrinos (RHNs) to explain neutrino masses at tree level by the seesaw mechanism. We make a comparative study of the highand low-scale seesaw scenarios and the effect of the Dirac neutrino Yukawa couplings on the stability of the Higgs potential. Bounds on the scalar quartic couplings and Dirac Yukawa couplings are obtained from vacuum stability and perturbativity considerations. These bounds are found to be relevant only for low-scale seesaw scenarios with relatively large Yukawa couplings. The regions corresponding to stability, metastability and instability of the electroweak vacuum are identified. These theoretical constraints give a very predictive parameter space for the couplings and masses of the new scalars and RHNs which can be tested at the LHC and future colliders. The lightest non-SM neutral CP-even/odd scalar can be a good dark matter candidate and the corresponding collider signatures are also predicted for the model.

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Multicomponent dark matter in extended U(1)_B−L: neutrino mass and high scale validity

Cited by 34 publications

References 124 publications

Connecting light dirac neutrinos to a multi-component dark matter scenario in gauged $$B-L$$ model

Connecting light dirac neutrinos to a multi-component dark matter scenario in gauged $$B-L$$ model

Multicomponent dark matter in noncommutative B − L gauge theory

Vacuum stability in inert higgs doublet model with right-handed neutrinos

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