Displaced vertices and long-lived charged particles in the NMSSM with right-handed sneutrinos

Cerdeño, David G.; Lozano, Víctor Martín; Seto, Osamu

doi:10.1007/jhep05(2014)035

Cited by 33 publications

(32 citation statements)

References 123 publications

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“…Fits to the spectrum of the GCE for annihilating sneutrino DM (including scalar annihilation channels) were examined more closely in [37]. Collider signatures of this scenario were discussed in [99].…”

Section: Seesaw In the Scale-invariant Nmssmmentioning

confidence: 99%

SUSY implications from WIMP annihilation into scalars at the Galactic Center

et al. 2015

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An excess in γ-rays emanating from the galactic centre has recently been observed in the Fermi-LAT data. This signal can be interpreted as resulting from WIMP annihilation, with the spectrum well-fit by dark matter annihilating dominantly into either bottom-quark or Higgs pairs. Supersymmetric models provide a well-motivated framework to study the implications of this signal in these channels. With a neutralino dark matter candidate, the γ-ray excess cannot be easily accommodated in the minimal supersymmetric model, which in any case requires tuning below the percent level to explain the observed Higgs mass. Instead we are naturally led to consider the next-to-minimal model with a singlet superfield. This not only allows for the annihilation channel into bottom-quark pairs to be implemented, but also provides new possibilities for annihilation into Higgs-pseudoscalar pairs. We show that the fit to the γ-ray excess for the Higgs-pseudoscalar channel can be just as good as for annihilation into bottom-quark pairs. Moreover, in the parameter range of interest, the next-to-minimal supersymmetric model solves the µ-problem and can explain the 125 GeV Higgs mass with improved naturalness. We also consider an extension by adding a right-handed neutrino superfield with the right-handed sneutrino acting as a dark matter candidate. Interestingly, this allows for the annihilation into pseudoscalar pairs which also provide a good fit to the γ-ray excess. Furthermore, in the case of a neutralino LSP, the late decay of a sneutrino NLSP can non-thermally produce the observed relic abundance. Finally, the WIMP annihilation into scalar pairs allows for the possibility of detecting the Higgs or pseudoscalar decay into two photons, providing a smoking-gun signal of the model.

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Section: Seesaw In the Scale-invariant Nmssmmentioning

confidence: 99%

SUSY implications from WIMP annihilation into scalars at the Galactic Center

et al. 2015

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“…This gives us a new means for probing the effective new physics at this lower mass scale, taking advantage of displaced vertices techniques. Recent works use displaced vertices for studying heavy sterile neutrinos in the LHC [14,38,[43][44][45][46][47] and future colliders [48,49].…”

Section: Introductionmentioning

confidence: 99%

Not-that-heavy Majorana neutrino signals at the LHC

Duarte

Peressutti

Sampayo

2017

J. Phys. G: Nucl. Part. Phys.

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We revisit the possibility of Majorana neutrinos production at the Large Hadron Collider (LHC) by studying the pp → l the angle between the final leptons, using a forward-backward like asymmetry to study the effects of the different gauge invariant operators. We also study the pp → l + i νγ process, which is dominant for low m N masses if tensorial one-loop generated new physics leading to a magnetic moment for the heavy neutrinos is present. This channel provides a powerful signal that could be observed at the LHC with the aid of non-pointing photons observables and cuts on the displacement between the prompt lepton and the photon in the final state.

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“…The most relevant process for our sneutrino DM is through the Z-boson exchange even this is not LH but RH [9,10], in contrast with most of other RH sneutrino DM models where the Higgs bosons exchange is dominant [42][43][44][45][46][47][48][49][50]. The DM-DM-Z vertex is induced by one-loop digram involving neutrinophilic Higgs boson.…”

Section: Dark Matter Scattering Cross Section With a Nucleonmentioning

confidence: 98%

Phenomenology in supersymmetric neutrinophilic Higgs model with sneutrino dark matter

Choi

Seto

Shin

2014

J. High Energ. Phys.

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We study a supersymmetric neutrinophilic Higgs model with large neutrino Yukawa couplings where neutrinos are Dirac particles and the lightest right-handed (RH) sneutrino is the lightest supersymmetric particle (LSP) as a dark matter candidate. Neutrinophilic Higgs bosons need to be rather heavy by the precise determination of the muon decay width and dark radiation constraints for large Yukawa couplings. From the Large Hadron Collider constraints, neutrinophilic Higgsino mass need to be heavier than several hundred GeV or close to the RH sneutrino LSP mass. The latter case is interesting because the muon anomalous magnetic dipole moment can be explained with a relatively large lightest neutrino mass, if RH sneutrino mixings are appropriately fine tuned in order to avoid stringent lepton flavor violation constraints. Dark matter is explained by asymmetric RH sneutrino dark matter in the favoured region by the muon anomalous magnetic dipole moment. In other regions, RH sneutrino could be an usual WIMP dark matter.

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Displaced vertices and long-lived charged particles in the NMSSM with right-handed sneutrinos

Cited by 33 publications

References 123 publications

SUSY implications from WIMP annihilation into scalars at the Galactic Center

SUSY implications from WIMP annihilation into scalars at the Galactic Center

Not-that-heavy Majorana neutrino signals at the LHC

Phenomenology in supersymmetric neutrinophilic Higgs model with sneutrino dark matter

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