Supersymmetry with a Chargino NLSP and Gravitino LSP

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.

arXiv comment27 pages and 16 figures

References in corpus (34)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Out Of This World Supersymmetry Breaking
• Theories with Gauge-Mediated Supersymmetry Breaking
• Gaugino Mass without Singlets
• Electric dipole moments as probes of new physics
• Precision Corrections in the Minimal Supersymmetric Standard Model
• Dynamical SUSY Breaking in Meta-Stable Vacua
• Precision SUSY Measurements at LHC
• The Supersymmetric Particle Spectrum
• Precise determination of the neutral Higgs boson masses in the MSSM
• Experimental Signatures of Low Energy Gauge Mediated Supersymmetry Breaking
• Dirac Gaugino Masses and Supersoft Supersymmetry Breaking
• Sparticle Spectroscopy and Electroweak Symmetry Breaking with Gauge-Mediated Supersymmetry Breaking
• Flavor in Supersymmetry with an Extended R-symmetry
• Discovering Supersymmetry at the Tevatron in Wino LSP Scenarios
• Light Higgsino Dark Matter
• Search for supersymmetry with a light gravitino at the Fermilab Tevatron and CERN LEP colliders
• The R Axion From Dynamical Supersymmetry Breaking
• Generic and Chiral Extensions of the Supersymmetric Standard Model
• The Minimal Supersymmetric Model without a mu term
• Signals for gauge-mediated supersymmetry breaking models at the CERN LEP2 collider
• Weak-scale phenomenology of models with gauge-mediated supersymmetry breaking
• More Visible Effects of the Hidden Sector
• A hidden solution to the mu/B_mu problem in gauge mediation
• Gauge-mediated SUSY Breaking with a Gluino LSP
• Hidden sector renormalization of MSSM scalar masses
• Three-body decays of selectrons and smuons in low-energy supersymmetry breaking models
• Localized Supersoft Supersymmetry Breaking
• Mass Degeneracy of the Higgsinos
• Pseudo-Dirac Bino Dark Matter
• Electric Dipole Moments in PseudoDirac Gauginos
• QCD Corrections to K-Kbar Mixing in R-symmetric Supersymmetric Models
• The NMSSM, Anomaly Mediation and a Dirac Bino

Cited by in corpus (49)

• Hunting Quasi-Degenerate Higgsinos
• The Status of GMSB After 1/fb at the LHC
• Physics searches at the LHC
• Supersoft Supersymmetry is Super-Safe
• R-symmetric gauge mediation
• THE TOOLS AND MONTE CARLO WORKING GROUP Summary Report from the Les Houches 2009 Workshop on TeV Colliders
• Generating mu and Bmu in models with Dirac Gauginos
• Prompt Decays of General Neutralino NLSPs at the Tevatron
• The Fate of Long-Lived Superparticles with Hadronic Decays after LHC Run 1
• Easy Dirac Gauginos
• The $m_D-b_M$ Problem of Dirac Gauginos and its Solutions
• Natural SUSY in Plain Sight
• Viable Gravity-Mediated Supersymmetry Breaking
• Charginos Hiding In Plain Sight
• Light Gravitinos at Colliders and Implications for Cosmology
• μto e in R-symmetric Supersymmetry
• A Definitive Signal of Multiple Supersymmetry Breaking
• Electroweakino constraints from LHC data
• Squark Flavor Violation at the LHC
• Electroweak Baryogenesis in R-symmetric Supersymmetry
• Very Light Charginos and Higgs Decays
• The Extended Higgs System in $R$-symmetric Supersymmetry Theories
• Signals of a Sneutrino (N)LSP at the LHC
• Constraining the $R$-symmetric chargino NLSP at the LHC
• The Supersymmetric Higgs
• Mixed Gauginos Sending Mixed Messages to the LHC
• Low-scale gaugino mediation, lots of leptons at the LHC
• Signatures of sneutrino dark matter in an extension of the CMSSM
• All Possible Lightest Supersymmetric Particles in R-Parity Violating Minimal Supergravity Models
• Natural gauge mediation with a bino NLSP at the LHC
• Exploring color-octet scalar parameter space in minimal $R$-symmetric models
• Sgoldstino-Higgs mixing in models with low-scale supersymmetry breaking
• Very Degenerate Higgsino Dark Matter
• Inverted Sparticle Hierarchies from Natural Particle Hierarchies
• Prospects for discovering supersymmetric long-lived particles with MoEDAL
• Long lived charginos in Natural SUSY?
• Supersymmetry with a Sister Higgs
• Natural SUSY at LHC with Right-Sneutrino LSP
• Characterizing Invisible Electroweak Particles through Single-Photon Processes at High Energy $e^{+}{e}^{-}$ Colliders
• Color-octet scalars in Dirac gaugino models with broken $R$ symmetry
• 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
• W' signatures with odd Higgs particles
• Phenomenology of General Gauge Mediation in light of a 125 GeV Higgs
• Stop Decay with LSP Gravitino in the final state: ${\tilde{t}}_1\to \tilde{G}Wb$
• Reinterpreting $pp\to W^{+}{W}^{-}$ searches for charginos
• Mass Sum Rule of the Effective Action on Vacua with Broken Rigid N=1 Supersymmetry
• Helicity Amplitudes for production of massive gravitino/goldstino
• A Hybrid Type I + III Inverse Seesaw Mechanism in $U(1{)}_{R-L}$-symmetric MSSM