CERN Accelerating science

Article
Report number CERN-EP-99-171
Title Search for Gauge-Mediated SUSY Breaking Topologies at s189 GeV
Author(s) ALEPH Collaboration  Show all 343 authors
Affiliation (CERN)
Publication 2001
Imprint 30 Nov 1999
Number of pages 30
Series (ALEPH Papers)
In: 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.e-page 142
DOI 10.1007/s100520050004
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LEP ; ALEPH
Abstract Searches for topologies characteristic of Gauge Mediated SUSY Breaking models (GMSB) are performed by analysing 173.6 pb^-1 of data collected at Ecm = 188.6 GeV with the ALEPH detector.These topologies include acoplanar photons, non-pointing single photon, acoplanar leptons, large impact parameter leptons, detached slepton decay vertices, heavy stable charged sleptons and four leptons 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 a minimal GMSB parameter space is performed and model dependent lower limits of about 45 GeV/c^2 on the next-to-lightest supersymmetric particle (NLSP) mass and of about 9 TeV on the mass scale parameter Lambda are derived, independently of the NLSP lifetime.

Corresponding record in: Inspire
Email contact: ariella.mazzari@cern.ch


 Record created 2000-01-05, last modified 2018-09-24


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