Searches for Gauge-Mediated Supersymmetry Breaking Topologies in e+e- collisions at LEP2

Abstract

Searches were performed for topologies predicted by gauge-mediated Supersymmetry breaking models (GMSB). All possible lifetimes of the next-to-lightest SUSY particle (NLSP), either the lightest neutralino or slepton, decaying into the lightest SUSY particle, the gravitino, were considered. No evidence for GMSB signatures was found in the OPAL data sample collected at centre-of-mass energies of sqrt{s}=189-209 GeV at LEP. Limits on the product of the production cross-sections and branching fractions are presented for all search topologies. To test the impact of the searches, a complete scan over the parameters of the minimal model of GMSB was performed. NLSP masses below 53.5 GeV/c^2 in the neutralino NLSP scenario, below 87.4 GeV/c^2 in the stau NLSP scenario and below 91.9 GeV/c^2 in the slepton co-NLSP scenario are excluded at 95% confidence level for all NLSP lifetimes. The scan determines constraints on the universal SUSY mass scale Lambda from the direct SUSY particle searches of Lambda > 40,27,21,17,15 TeV/c^2 for messenger indices N=1,2,3,4,5 for all NLSP lifetimes.

61 pages, 19 figures, Submitted to Euro. Phys. J. C

References in corpus (20)

• Search for the Standard Model Higgs Boson at LEP
• Confidence Level Computation for Combining Searches with Small Statistics
• Theories with Gauge-Mediated Supersymmetry Breaking
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• BHWIDE 1.00: O(alpha) YFS Exponentiated Monte Carlo for Bhabha Scattering at Wide Angles for LEP1/SLC and LEP2
• Sparticle Spectroscopy and Electroweak Symmetry Breaking with Gauge-Mediated Supersymmetry Breaking
• Cosmology of Supersymmetric Models with Low-energy Gauge Mediation
• Search for Anomalous Production of Di-lepton Events with Missing Transverse Momentum in e+e- Collisions at sqrt(s) = 183-209 GeV
• grc4f v1.1: a Four-fermion Event Generator for e+e- Collisions
• grc4f v1.0: a Four-fermion Event Generator for e+e- Collisions
• Tests of the Standard Model and Constraints on New Physics from Measurements of Fermion-Pair Production at 189-209 GeV at LEP
• Searches for Neutral Higgs Bosons in Extended Models
• Monte Carlo Program KoralW 1.42 for All Four-Fermion Final States in e+e- Collisions
• Signals for gauge-mediated supersymmetry breaking models at the CERN LEP2 collider
• Search for Stable and Long-Lived Massive Charged Particles in e+e- Collisions at sqrt(s) = 183-209 GeV
• Search for Chargino and Neutralino Production at sqrt{s} = 170 and 172 GeV at LEP
• SUSYGEN 2.2 - A Monte Carlo Event Generator for MSSM Sparticle Production at e+ e- Colliders
• Implications of the Higgs Boson Searches on Different Soft SUSY-breaking Scenarios
• $\gamma \gamma$ Event Generators
• Mulit-Photon Events with Large Missing energy in e+e- collisions at sqrt(s)=192-209 GeV

Cited by in corpus (31)

• Stable Massive Particles at Colliders
• LHC-friendly minimal freeze-in models
• Search for Displaced Supersymmetry in events with an electron and a muon with large impact parameters
• Search for Supersymmetry in pp Collisions at sqrt(s) = 7 TeV in Events with Two Photons and Missing Transverse Energy
• Further search for supersymmetry at sqrt(s) = 7 TeV in final states with jets, missing transverse momentum and isolated leptons with the ATLAS detector
• Search for direct top squark pair production in final states with two tau leptons in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Long-Lived Staus and Displaced Leptons at the LHC
• Measurement of the W boson mass and width in e+e- collisions at LEP
• Search for supersymmetry in events with large missing transverse momentum, jets, and at least one tau lepton in 20 fb${}^{-1}$ of $\sqrt{s}$=8 TeV proton-proton collision data with the ATLAS detector
• Search for displaced leptons in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• A feeble window on leptophilic dark matter
• Master Equation for the Motion of a Polarizable Particle in a Multimode Cavity
• Search for new physics in events with photons, jets, and missing transverse energy in pp collisions at sqrt(s) = 7 TeV
• Search for Supersymmetry in Events with Large Missing Transverse Momentum, Jets, and at Least One Tau Lepton in 7 TeV Proton-Proton Collision Data with the ATLAS Detector
• Search for events with large missing transverse momentum, jets, and at least two tau leptons in 7 TeV proton-proton collision data with the ATLAS detector
• Searches for Supersymmetry at High-Energy Colliders
• Peccei-Quinn extended gauge-mediation model with vector-like matter
• The new $(g-2{)}_{\mu }$ result and the $\mu \nu$SSM
• Search for direct pair production of supersymmetric partners of $\tau$ leptons in the final state with two hadronically decaying $\tau$ leptons and missing transverse momentum in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Selectron NLSP in Gauge Mediation
• Search for supersymmetry with jets, missing transverse momentum and at least one hadronically decaying tau lepton in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Search for supersymmetry with a photon, a lepton, and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV
• Multilepton signals of gauge mediated supersymmetry breaking at the LHC
• Test of Colour Reconnection Models using Three-Jet Events in Hadronic Z Decays
• Determination of the muonic branching ratio of the W boson and its total width via cross-section measurements at the Tevatron and LHC
• Constrained Dirac gluino mediation
• Search for pairs of muons with small displacements in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for displaced leptons in $\sqrt{s}=13$ TeV and $13.6$ TeV $pp$ collisions with the ATLAS detector
• Falsifiable analog model predictions of $W$ mass in CDF II and ATLAS
• Optimizing Trigger-Level Track Reconstruction for Sensitivity to Exotic Signatures
• Searching for dark radiation at the LHC