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# Search for gauge mediated SUSY breaking topologies in $e^+ e^-$ collisions at centre-of-mass energies up to 209 GeV

Abstract : A total of 628$\invpb$ of data collected with the ALEPH detector at centre-of-mass energies from 189 to 209\,GeV is analysed in the search for gauge mediated SUSY breaking (GMSB) topologies. These topologies include two acoplanar photons, non-pointing single photons, acoplanar leptons, large impact parameter leptons, detached slepton decay vertices, heavy stable charged sleptons and multi-leptons plus missing energy final states. No evidence is found for new phenomena, and lower limits on masses of supersymmetric particles are derived. A scan of a minimal GMSB parameter space is performed and lower limits are set for the next-to-lightest supersymmetric particle (NLSP) mass at 54$\gevcc$ and for the mass scale parameter $\Lambda$ at 10$\tevcc$, independently of the NLSP lifetime. Including the results from the neutral Higgs boson searches, a NLSP mass limit of 77$\gevcc$ is obtained and values of $\Lambda$ up to 16$\tevcc$ are excluded.
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Journal articles
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http://hal.in2p3.fr/in2p3-00011714
Contributor : Magali Damoiseaux Connect in order to contact the contributor
Submitted on : Tuesday, November 5, 2002 - 9:54:24 AM
Last modification on : Saturday, October 9, 2021 - 4:00:24 AM
Long-term archiving on: : Tuesday, June 2, 2015 - 12:31:07 PM

### Identifiers

• HAL Id : in2p3-00011714, version 1

### Citation

A. Heister, S. Schael, R. Barate, R. Bruneliere, I. de Bonis, et al.. Search for gauge mediated SUSY breaking topologies in $e^+ e^-$ collisions at centre-of-mass energies up to 209 GeV. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2002, 25, pp.339-351. ⟨in2p3-00011714⟩

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