Displaced Supersymmetry

Graham, Peter W.; Kaplan, David E.; Rajendran, Surjeet; Saraswat, Prashant

doi:10.1007/jhep07(2012)149

Cited by 117 publications

(123 citation statements)

References 150 publications

(184 reference statements)

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“…7 See also previous analyses in [46,47]. 8 The main difference is the presence of two allowed octants for the atmospheric mixing in the analyses of [43,[45][46][47] while only one octant is present in the Bari group analysis, since it is more strongly preferred in that case [44]. Figure 1.…”

Section: Scalar Potential and Spectrummentioning

confidence: 87%

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Bilinear R-parity violation with flavor symmetry

Bazzocchi

Morisi

Peinado

et al. 2013

J. High Energ. Phys.

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Bilinear R-parity violation (BRPV) provides the simplest intrinsically supersymmetric neutrino mass generation scheme. While neutrino mixing parameters can be probed in high energy accelerators, they are unfortunately not predicted by the theory. Here we propose a model based on the discrete flavor symmetry A 4 with a single R-parity violating parameter, leading to (i) correct Cabbibo mixing given by the Gatto-Sartori-Tonin formula, and a successful unification-like b-tau mass relation, and (ii) a correlation between the lepton mixing angles θ 13 and θ 23 in agreement with recent neutrino oscillation data, as well as a (nearly) massless neutrino, leading to absence of neutrinoless double beta decay.

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Section: Scalar Potential and Spectrummentioning

confidence: 87%

“…to consider alternative scenarios [7] where, in addition, the stringent bounds on the squark and gluino masses are relaxed [8,9].…”

Section: Jhep01(2013)033mentioning

confidence: 99%

Bilinear R-parity violation with flavor symmetry

Bazzocchi

Morisi

Peinado

et al. 2013

J. High Energ. Phys.

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“…Such tracks are rejected by most analyses at ATLAS and CMS, preventing proper reconstruction of leptons and eliminating the sensitivity of standard searches in leptonic final states [4]. However, dedicated searches for displaced decays can place strong bounds due to the low backgrounds to these types of events.…”

Section: Figmentioning

confidence: 99%

“…It has long been known that baryon number violating RPV can greatly reduce the collider bounds on supersymmetry (e.g. [2][3][4][5]). In fact until relatively recently there were no experimental searches that could robustly constrain colored superpartners as light as a few hundred GeV.…”

Section: Introduction and Synopsismentioning

confidence: 99%

Supersymmetric crevices: Missing signatures ofR-parity violation at the LHC

2014

Self Cite

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Supersymmetry is under pressure from LHC searches requiring colored superpartners to be heavy. We demonstrate R-parity violating spectra for which the dominant signatures are not currently well searched for at the LHC. In such cases, the bounds can be as low as 800 GeV on both squarks and gluinos. We demonstrate that there are nontrivial constraints on squark and gluino masses with baryonic RPV (U DD operators) and show that in fact leptonic RPV can allow comparable or even lighter superpartners. The constraints from many searches are weakened if the LSP is significantly lighter than the colored superpartners, such that it is produced with high boost. The LSP decay products will then be collimated, leading to the miscounting of leptons or jets and causing such models to be missed even with large production cross-sections. Other leptonic RPV scenarios that evade current searches include the highly motivated case of a higgsino LSP decaying to a tau and two quarks, and the case of a long-lived LSP with a displaced decay to electrons and jets. The least constrained models can have SUSY production cross-sections of ∼ pb or larger, implying tens of thousands of SUSY events in the 8 TeV data. We suggest novel searches for these signatures of RPV, which would also improve the search for general new physics at the LHC.

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“…Although there are many LHC searches for displaced vertices [30,40], hadronically-decaying long-lived particles are significantly harder to constrain [41]; viable decay lengths can even exceed ∼ 10 cm, so a dedicated search is necessary. Given these uncertainties, we consider the experimental bounds in two regimes: for prompt decays, we conservatively require decay lengths q < 2 mm; for signatures with viable displaced vertices, we demand q < 10 cm, so most sparticles decay inside the tracker before reaching the hadronic calorimeter (HCAL), but may still be found with a dedicated search.…”

Section: Displaced Verticesmentioning

confidence: 99%

Soft RPV through the baryon portal

Krnjaic

Tsai

2014

J. High Energ. Phys.

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Supersymmetric (SUSY) models with R-parity generically predict sparticle decays with invisible neutralinos, which yield distinctive missing energy events at colliders. Since most LHC searches are designed with this expectation, the putative bounds on sparticle masses become considerably weaker if R-parity is violated so that squarks and gluinos decay to jets with large QCD backgrounds. Here we introduce a scenario in which baryonic R-parity violation (RPV) arises effectively from soft SUSY breaking interactions, but leptonic RPV remains accidentally forbidden to evade constraints from proton decay and FCNCs. The model features a global R-symmetry that initially forbids RPV interactions, a hidden R-breaking sector, and a heavy mediator that communicates this breaking to the visible sector. After R-symmetry breaking, the mediator is integrated out and an effective RPV A-term arises at tree level; RPV couplings between quarks and squarks arise only at loop level and receive additional suppression. Although this mediator must be heavy compared to soft masses, the model introduces no new hierarchy since viable RPV can arise when the mediator mass is near the SUSY breaking scale. In generic regions of parameter space, a light thermally-produced gravitino is stable and can be a viable dark matter candidate.

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Displaced Supersymmetry

Cited by 117 publications

References 150 publications

Bilinear R-parity violation with flavor symmetry

Bilinear R-parity violation with flavor symmetry

Supersymmetric crevices: Missing signatures ofR-parity violation at the LHC

Soft RPV through the baryon portal

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