Experimental Search for Chargino and Neutralino Production in Supersymmetry Models with a Light Gravitino

Abstract

We search for inclusive high $E_T$ diphoton events with large missing transverse energy in $p\bar{p}$ collisions at $\sqrt{s}$=1.8 TeV. Such events are expected from pair production of charginos and neutralinos within the framework of the minimal supersymmetric standard model with a light gravitino. No excess of events is observed. In that model, and assuming gaugino mass unification at the GUT scale, we obtain a 95% CL exclusion region in the supersymmetry parameter space and lower mass bounds of 150 GeV/c${}^2$ for the lightest chargino and 75 GeV/c${}^2$ for the lightest neutralino.

arXiv comment11 pages, 4 eps figures, To be Published in Phys. Rev. Letters

References in corpus (14)

• New Tools for Low Energy Dynamical Supersymmetry Breaking
• Global QCD Analysis and the CTEQ Parton Distributions
• Experimental Signatures of Low Energy Gauge Mediated Supersymmetry Breaking
• Search for supersymmetry with a light gravitino at the Fermilab Tevatron and CERN LEP colliders
• Supersymmetric analysis and predictions based on the CDF eeγγ+ missing E_T event
• Experimental Consequences of a Minimal Messenger Model for Supersymmetry Breaking
• Signals for the Minimal Gauge-mediated Supersymmetry Breaking Model at the Fermilab Tevatron Collider
• Implications of Low Energy Supersymmetry Breaking at the Tevatron
• Signals for gauge-mediated supersymmetry breaking models at the CERN LEP2 collider
• Detecting a Light Gravitino at Linear Collider to Probe the SUSY Breaking Scale
• Supersymmetric photonic signals at LEP
• Search for Diphoton Events with Large Missing Transverse Energy in proton-antiproton collisions at sqrt(s) = 1.8 TeV
• Neutralino Production as SuSy Discovery Process at CERN LEP2
• Analysis of LEP Constraints on Supersymmetric Models with a Light Gravitino

Cited by in corpus (30)

• The Upgraded D0 Detector
• Generic and Chiral Extensions of the Supersymmetric Standard Model
• New Signal for Universal Extra Dimensions
• Searches for New Physics in Diphoton Events in proton anti-proton collisions at sqrt(s)=1.8TeV
• Search for gauge mediated SUSY breaking topologies in e+e- collisions at centre-of-mass energies up to 209GeV
• Searches for New Physics in Diphoton Events in proton anti-proton collisions at sqrt(s)=1.8TeV
• The Reach of Tevatron Upgrades in Gauge-Mediated Supersymmetry Breaking Models
• The Reach of the CERN Large Hadron Collider for Gauge-Mediated Supersymmetry Breaking Models
• Search for Supersymmetry in Di-Photon Final States at sqrt{s} = 1.96 TeV
• Phenomenological Aspects of a Direct-transmission Model of Dynamical Supersymmetry Breaking with the Gravitino Mass $m_{3/2} < 1~\KEV$
• Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events at D0
• Search for diphoton events with large missing transverse energy in 6.3 fb-1 of ppbar collisions at sqrt(s)=1.96 TeV
• Search for Anomalous Production of Diphoton Events with Missing Transverse Energy at CDF and Limits on Gauge-Mediated Supersymmetry-Breaking Models
• Studying W+W- production at the Fermilab Tevatron with SHERPA
• Probing Gauge-Mediated Supersymmetry Breaking Models at the Tevatron via Delayed Decays of the Lightest Neutralino
• Radiative decay of the lightest neutralino in an R-parity violating supersymmetric theory
• Search for New Physics in Photon-Lepton Events in pbar-p Collisions at root-s= 1.8 TeV
• New Higgs Couplings at e+ e- and Hadronic Colliders
• Search for Non-standard Higgs Boson in Diphoton Events at p pbar Collisions
• Search for New Physics in Photon-Lepton Events in Proton-Antiproton Collisions at sqrt(s) = 1.8 TeV
• Top-squark searches at the Tevatron in models of low-energy supersymmetry breaking
• Gauge Mediated Supersymmetry Signals at the Tevatron Involving Tau Leptons
• The Reach of CERN LEP2 and Fermilab Tevatron Upgrades for Higgs Bosons in Supersymmetric Models
• The Search for Supersymmetry at the Tevatron Collider
• Prospects of Searches for Neutral, Long-Lived Particles which Decay to Photons using Timing at CDF
• The di-photon signature of Higgs bosons in GMSB models at the LHC
• Search for Light Gravitinos in Events with Photons and Missing Transverse Momentum at HERA
• Filtering Out Signals of Gauge-Mediated Supersymmetry Breaking: Can We Always Eliminate Conventional Supersymmetric Effects ?
• R-parity Violating Radiative Photino Decay in Supersymmetric Models
• Recent Results from GMSB SUSY Searches at D0