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 Physics Letters B 469 (1999) 303-314
 Searches for sleptons and squarks in $e^+ e^-$ collisions at 189 GeV
 ALEPH Collaboration(s)
 (1999)
 The data collected at a centre-of-mass energy of 188.6 GeV by ALEPH at LEP, corresponding to an integrated luminosity of 173.6 pb$^{-1}$, are analysed in a search for the scalar partners of quarks and leptons predicted in supersymmetric models. No evidence for any such particles was found in the decay channels $\sle \to \ell \chi$, $\stop \rightarrow \mathrm{c}\neu$, $\stop \rightarrow \mathrm{b}\ell\snu$, $\sbot \rightarrow \mathrm{b}\neu$, and $\mathrm{\tilde{q}} \rightarrow \mathrm{q}\neu$. Improved mass lower limits have been obtained in the framework of the Minimal Supersymmetric Standard Model.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
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 in2p3-00003736, version 1 http://hal.in2p3.fr/in2p3-00003736 oai:hal.in2p3.fr:in2p3-00003736 Contributeur : Nicole Berger <> Soumis le : Mardi 4 Avril 2000, 10:40:41 Dernière modification le : Jeudi 2 Juin 2005, 14:24:14