130 GeV gamma ray line and enhanced Higgs di-photon rate from Triplet-Singlet extended MSSM

Basak, Tanushree; Mohanty, Subhendra

doi:10.48550/arxiv.1304.6856

Cited by 5 publications

(5 citation statements)

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“…[9] and references therein, the latter is less known and has received special attention only after ATLAS and CMS initially measured sizeable deviations in the diphoton Higgs rate [10,11]. Indeed, the triplet superfield involves extra charginos that can largely enhance the diphoton channel [12][13][14] without requiring peculiar features such as large deviations in the main Higgs decay rates, huge stop masses, ultra light charginos or very heavy Higgsinos as it occurs in other scenarios [5,[15][16][17]. In particular, such an enhancement can be achieved in both decoupling and non-decoupling regime (i.e.…”

Section: Introductionmentioning

confidence: 99%

Dark matter versus h → γγ and h → γZ with supersymmetric triplets

Arina

Lozano

Nardini

2014

J. High Energ. Phys.

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The Triplet extension of the MSSM (TMSSM) alleviates the little hierarchy problem and provides a significant enhancement of the loop-induced diphoton rate of the lightest CP-even Higgs h. In this paper we pursue the analysis of the TMSSM Higgs phenomenology by computing for the first time the h → Zγ decay. Interestingly we find that the rates of loop-induced decays are correlated and their signal strengths can rise up to 40%-60% depending on the channel. We furthermore study the dark matter phenomenology of the TMSSM. The lightest neutralino is a good dark matter candidate in two regions. The first one is related to the Higgs and Z resonances and the LSP is mostly Bino. The second one is achieved for a mass larger than 90 GeV and the LSP behaves as the well-tempered neutralino. An advantage of the triplet contribution is that the well-tempered neutralino can be a Bino-Triplino mixture, relieving the problem of achieving M 2 ∼ M 1 in unified scenarios. The dark matter constraints strongly affect the Higgs phenomenology, reducing the potential enhancements of the diphoton and of the Zγ channels by 20% at most. In the near future, dark matter direct searches and collider experiments will probe most of the parameter space where the neutralino is the dark matter candidate.

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Section: Introductionmentioning

confidence: 99%

Dark matter versus h → γγ and h → γZ with supersymmetric triplets

Arina

Lozano

Nardini

2014

J. High Energ. Phys.

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“…The Feynman diagram is shown in Fig. 1 (see also [28,53,65,66] for example). In this model, we assume that the dark matter particles are Majorana fermions.…”

Section: A Model With Boson Mediator and Triangle Loopmentioning

confidence: 99%

Interpretations of the possible 42.7 GeV $γ$-ray line

Feng,

Liang,

Dong

et al. 2016

Preprint

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Recently Liang et al. found a tentative line signal at about 43 GeV in the directions of sixteen nearby Galaxy Clusters. If arising from dark matter annihilation, the mass of the dark matter particles should be mχ ∼ 43 GeV and the annihilation cross section σv ∼ 5×10 −28 (BF/10 3 ) −1 cm 3 s −1 is needed, where BF is the averaged boost factor of the annihilation signal of these Galaxy Clusters. In this work we discuss several models which could interpret these features and estimate the model parameters. Usually sizeable coupling parameter is needed. The 2σ upper limits on the cross section of the dark matter annihilation into various final states such as b b, µ + µ − and so on are also presented.

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“…These results indicate enhancement in the diphoton decay channel, with more than 2σ deviation, which could be a very important signal for possible new physics beyond the SM. Much work has been done to accommodate these results in different extensions of the SM [26,27,28,29,30,31,32,33,34,35]. The Higgs signal strength of the decay channel, H → γγ, relative to the SM expectation is defined as…”

Section: Couplings Of the Sm-like Higgsmentioning

confidence: 99%

Phenomenological aspects of a TeV-scale alternative left-right model

Ashry

Khalil

2015

Phys. Rev. D

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We revisit the alternative left-right symmetric model, motivated by the superstring-inspired E6 model. We systematically analyze the constraints imposed by theoretical and experimental bounds on the parameter space of this class of models. We perform a comprehensive analysis of the Higgs sector and show that three neutral CP -even and two CP -odd Higgs bosons in addition to two charged Higgs bosons can be light, of O(100) GeV. We emphasize that the predictions of this model for the signal strengths of Higgs decays are consistent with the standard model expectations. We also explore discovery signatures of the exotic down-type quark, which is one of the salient predictions of this model.

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130 GeV gamma ray line and enhanced Higgs di-photon rate from Triplet-Singlet extended MSSM

Cited by 5 publications

References 0 publications

Dark matter versus h → γγ and h → γZ with supersymmetric triplets

Dark matter versus h → γγ and h → γZ with supersymmetric triplets

Interpretations of the possible 42.7 GeV $γ$-ray line

Phenomenological aspects of a TeV-scale alternative left-right model

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