Search for sharp and smooth spectral signatures of μνSSM gravitino dark matter with Fermi-LAT

Gomez-Vargas, G. A.; López-Fogliani, Daniel E.; Muñoz, Carlos; Pérez, Andrés D.; Austri, Roberto Ruiz de

doi:10.1088/1475-7516/2017/03/047

Cited by 38 publications

(39 citation statements)

References 101 publications

(206 reference statements)

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“…One of the consequences is that there is no lightest stable SUSY particle anymore. Nevertheless, the model can still provide a dark matter candidate with a gravitino that has a life time longer than the age of the observable universe [22][23][24][25]. Since the lightest particle beyond the SM is not stable, it can carry electrical charge or even be coloured.…”

Section: Introductionmentioning

confidence: 99%

Precise prediction for the Higgs-boson masses in the $$\mu \nu $$ μ ν SSM

2018

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The μνSSM is a simple supersymmetric extension of the Standard Model (SM) capable of predicting neutrino physics in agreement with experiment. In this paper we perform the complete one-loop renormalization of the neutral scalar sector of the μνSSM with one generation of right-handed neutrinos in a mixed on-shell/DR scheme. The renormalization procedure is discussed in detail, emphasizing conceptual differences to the minimal (MSSM) and next-to-minimal (NMSSM) supersymmetric standard model regarding the field renormalization and the treatment of nonflavor-diagonal soft mass parameters, which have their origin in the breaking of R-parity in the μνSSM. We calculate the full one-loop corrections to the neutral scalar masses of the μνSSM. The one-loop contributions are supplemented by available MSSM higher-order corrections. We obtain numerical results for a SM-like Higgs boson mass consistent with experimental bounds. We compare our results to predictions in the NMSSM to obtain a measure for the significance of genuine μνSSM-like contributions. We only find minor corrections due to the smallness of the neutrino Yukawa couplings, indicating that the Higgs boson mass calculations in the μνSSM are at the same level of accuracy as in the NMSSM. Finally we show that the μνSSM can accomodate a Higgs boson that could explain an excess of γ γ events at ∼ 96 GeV as reported by CMS, as well as the 2 σ excess of bb events observed at LEP at a similar mass scale.

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Section: Introductionmentioning

confidence: 99%

Precise prediction for the Higgs-boson masses in the $$\mu \nu $$ μ ν SSM

2018

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“…As explained in Sec. 2, how the model reproduces the correct neutrino masses and mixing angles has been intensively addressed in the literature [19,34,35,64,12]. Although the parameters in Eq.…”

Section: Input Parametersmentioning

confidence: 99%

Impact of Higgs physics on the parameter space of the $$\mu \nu \mathrm{SSM}$$

et al. 2020

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Given the increasing number of experimental data, together with the precise measurement of the properties of the Higgs boson at the LHC, the parameter space of supersymmetric models seems to be constrained. We carry out a detail analysis of this issue in the framework of the µνSSM. In this model, three families of right-handed neutrino superfields are present in order to solve the µ problem and simultaneously reproduce neutrino physics. The new couplings and sneutrino vacuum expectation values in the µνSSM induce new mixing of states, and, in particular, the three right sneutrinos can be substantially mixed with the neutral Higgses. After diagonalization, the masses of the corresponding three singlet-like eigenstates can be smaller or larger than the mass of the Higgs, or even degenerated with it. We analyze whether these situations are still compatible with the experimental results. To address it we scan the parameter space of the Higgs sector of the model. In particular, we sample the µνSSM using a powerful likelihood data-driven method, paying special attention to satisfy the 7-, 8-and latest 13-TeV LHC data, with some complementary data from Tevatron and LEP, as well as a class of flavor observables. We find that large regions of the parameters space of the µνSSM are viable, containing an interesting phenomenology that could be probed at the LHC.

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“…In recent works [21,22], a complete analysis of the detection of μνSSM gravitino dark matter through γ-ray observations was carried out. In addition to the two-body decay producing an anisotropic sharp line, the three-body decays producing a smooth spectral signature were included in the analysis.…”

Section: Gravitino Dm In the μνSsmmentioning

confidence: 99%

Models of Supersymmetry for Dark Matter

Muñoz

2017

EPJ Web Conf.

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Abstract. A brief review of supersymmetric models and their candidates for dark matter is carried out. The neutralino is a WIMP candidate in the MSSM where R-parity is conserved, but this model has the μ problem. There are natural solutions to this problem that necessarily introduce new structure beyond the MSSM, including new candidates for dark matter. In particular, in an extension of the NMSSM, the right-handed sneutrino can be used for this job. In R-parity violating models such as the μνSSM, the gravitino can be the dark matter, and could be detected by its decay products in gamma-ray experiments.

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Search for sharp and smooth spectral signatures of μνSSM gravitino dark matter with Fermi-LAT

Cited by 38 publications

References 101 publications

Precise prediction for the Higgs-boson masses in the $$\mu \nu $$ μ ν SSM

Precise prediction for the Higgs-boson masses in the $$\mu \nu $$ μ ν SSM

Impact of Higgs physics on the parameter space of the $$\mu \nu \mathrm{SSM}$$

Models of Supersymmetry for Dark Matter

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