Gianotti, F

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ORGANISATION EUROPEENNE POUR LA RECHERCHE NUCLEAIRE (CERN)Laboratoire Europeen pour la Physique des ParticulesALEPH 2001− 009CONF 2001− 00628 February 2001Search for Charginos and Neutralinosin e+e− Collisions atps up to 208 GeVandMass Limit for the Lightest NeutralinoThe ALEPH CollaborationContact person:Fabiola Gianotti (Fabiola.Gianotti@cern.ch)PRELIMINARYAbstractSearches for pair production of charginos and associated production of neutrali-nos have been performed using the data collected with the ALEPH detector in theyear 2000 atps = 200 − 208 GeV. This data sample corresponds to an integratedluminosity of  217 pb−1. No evidence for a signal has been observed. The neg-ative results of these searches have been translated into exclusion domains in theMSSM parameter space, assuming gaugino and sfermion mass unification and largesfermion masses. Under these conditions, chargino pair production and neutralinoassociated production are excluded for masses close to the kinematic limit over largeportions of the parameter space. In addition, a 95% C.L. lower limit of 39.6 GeV/c2has been set on the mass of the lightest neutralino for any tanβ.(ALEPH contribution to the 2001 Winter Conferences)

Search for Charginos and Neutralinos in $e^+ e^-$ Collisions at $\sqrt{s}$ up to 208 GeV and Mass Limit for the Lightest Neutralino

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Search for Charginos and Neutralinos in e+e−e^+ e^-e+e− Collisions at s\sqrt{s}s​ up to 208 GeV and Mass Limit for the Lightest Neutralino

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Search for Charginos and Neutralinos in $e^+ e^-$ Collisions at $\sqrt{s}$ up to 208 GeV and Mass Limit for the Lightest Neutralino