Archive - EP Seminar (until 2008)

Search for Gauge Mediated SUSY Breaking topologies with ALEPH

by Mario ANTONELLI (INFN Milano)

500/1-001 - Main Auditorium (CERN)

500/1-001 - Main Auditorium


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Searches for topologies characteristic of Gauge Mediated SUSY Breaking (GMSB) models have been performed by analysing data collected at ÷s = 130-189 GeV with the ALEPH detector. These topologies include acoplanar photons, non-pointing single photons, acoplanar leptons, large impact parameter leptons, detached slepton decay vertices, heavy stable charged sleptons and four lepton plus missing energy final states. No evidence for these new phenomena is observed and limits on production cross-sections and sparticle masses are derived. A scan of the minimal GMSB parameter space was performed and a model dependent lower limit of about 45 GeV on the next-to-lightest supersymmetric particle (NLSP) mass and of about 9 TeV on the parameter L was derived, independently of the NLSP lifetime.

Organiser(s): Fabiola Gianotti/ EP Division

Note: Tea & coffee will be served at 16.00 hrs.