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

ALEPH Collaboration, The and Heister, A. and Bouhova-Thacker, Evelina and Bowdery, Christopher and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Smizanska, Maria (2002) Search for gauge mediated SUSY breaking topologies in $e^+ e^-$ collisions at center-of-mass energies up to 209-GeV. European Physical Journal C: Particles and Fields, 25 (3). pp. 339-351. ISSN 1434-6044

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Abstract

A total of 628 bp-1 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 GeV/c2 and for the mass scale parameter Λ at 10 TeV/c2, independently of the NLSP lifetime. Including the results from the neutral Higgs boson searches, a NLSP mass limit of 77 GeV/c2 is obtained and values of Λ up to 16 TeV/c2 are excluded.

Item Type: Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63913
Deposited By: ep_importer_pure
Deposited On: 03 May 2013 11:14
Refereed?: Yes
Published?: Published
Last Modified: 19 Sep 2017 04:43
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63913

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