DOI 10.1007/s100520000389
Search for gauge mediated SUSY breaking
topologies
at
GeV
The ALEPH Collaboration
R. Barate - et al.
Laboratoire de Physique des Particules (LAPP), IN2P3-CNRS,
74019 Annecy-le-Vieux Cedex, France
Received: 30 November 1999 / Published online: 14 April 2000 - © Springer-Verlag 2000
Abstract
Searches for topologies characteristic of Gauge Mediated SUSY Breaking
models (GMSB) are performed by analysing 173.6
pb-1 of
data collected at
= 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/c2 on the
next-to-lightest supersymmetric particle (NLSP) mass and of about 9 TeV on the
mass scale parameter
are derived, independently of the NLSP
lifetime.
Copyright Società Italiana di Fisica, Springer-Verlag 2000