Supersymmetry with a Chargino NLSP and Gravitino LSP
arXiv:0807.4936 · doi:10.1088/1126-6708/2009/01/023
Abstract
We demonstrate that the lightest chargino can be lighter than the lightest neutralino in supersymmetric models with Dirac gaugino masses as well as within a curious parameter region of the MSSM. Given also a light gravitino, such as from low scale supersymmetry breaking, this mass hierarchy leads to an unusual signal where every superpartner cascades down to a chargino that decays into an on-shell W and a gravitino, possibly with a macroscopic chargino track. We clearly identify the region of parameters where this signal can occur. We find it is generic in the context of the R-symmetric supersymmetric standard model, whereas it essentially only occurs in the MSSM when sign(M1) is not equal to sign(M2) = sign(μ) and tan(beta) is small. We briefly comment on the search strategies for this signal at the LHC.
27 pages and 16 figures
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Cited by in corpus (18)
- R-symmetric gauge mediation
- The Fate of Long-Lived Superparticles with Hadronic Decays after LHC Run 1
- Natural SUSY in Plain Sight
- Viable Gravity-Mediated Supersymmetry Breaking
- μto e in R-symmetric Supersymmetry
- Electroweakino constraints from LHC data
- Squark Flavor Violation at the LHC
- Electroweak Baryogenesis in R-symmetric Supersymmetry
- The Supersymmetric Higgs
- Low-scale gaugino mediation, lots of leptons at the LHC
- Sgoldstino-Higgs mixing in models with low-scale supersymmetry breaking
- Very Degenerate Higgsino Dark Matter
- Radiative Corrections to Aid the Direct Detection of the Higgsino-like Neutralino Dark Matter: Spin-Independent Interactions
- R-parity violating chargino decays at the LHC
- Reinterpreting searches for charginos
- Helicity Amplitudes for production of massive gravitino/goldstino
- Mass Sum Rule of the Effective Action on Vacua with Broken Rigid N=1 Supersymmetry
- A Hybrid Type I + III Inverse Seesaw Mechanism in -symmetric MSSM