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  • Search for charginos in e +...
    Abreu, P.; Almehed, S.; Amaldi, U.; Andreazza, A.; Arnoud, Y.; Augustin, J-E.; Barbier, R.; Battaglia, M.; Baubillier, M.; Blom, H.M.; Bonesini, M.; Boonekamp, M.; Bourdarios, C.; Canale, V.; Carena, F.; Drees, J.; Duperrin, A.; Durand, J-D.; Ellert, M.; Feindt, M.; Ferrer-Ribas, E.; Franek, B.; Gamba, D.; Gaspar, C.; Gasparini, U.; Gorn, L.; Gris, P.; Haag, C.; Hallgren, A.; Huet, K.; Jarlskog, Ch; Jean-Marie, B.; Johansson, E.K.; Kapusta, F.; Khomenko, B.A.; Kokkinias, P.; Kostioukhine, V.; Kouznetsov, O.; Krammer, M.; Kurowska, J.; Libby, J.; Lopez, J.M.; MacNaughton, J.; Malmgren, T.G.M.; Mandl, F.; Marechal, B.; Matorras, F.; Matteuzzi, C.; Mc Kay, R.; Meyer, W.T.; Migliore, E.; Mulders, M.; Mulet-Marquis, C.; Muresan, R.; Myklebust, T.; Nassiakou, M.; Navarria, F.L.; Paiano, S.; Papadopoulou, Th.D.; Passon, O.; Peralta, L.; Perrotta, A.; Phillips, H.T.; Pimenta, M.; Pol, M.E.; Radojicic, D.; Rames, J.; Read, A.L.; Ridky, J.; Ripp-Baudot, I.; Royon, Ch; Ruiz, A.; Sacquin, Y.; Sadovsky, A.; Sajot, G.; Schwickerath, U.; Scuri, F.; Sisakian, A.N.; Smadja, G.; Smirnova, O.; Sopczak, A.; Sosnowski, R.; Stanic, S.; Szeptycka, M.; Tobin, M.; Todorova, S.; Tortora, L.; Tortosa, P.; Tristram, G.; Troncon, C.; Tzamarias, S.; Vallazza, E.; Van Doninck, W.K.; Verdier, P.; Verzi, V.; Walck, C.; Washbrook, A.J.; Zalewski, P.; Zavrtanik, D.; Zumerle, G.

    Physics letters. B, 4/2000, Letnik: 479, Številka: 1
    Journal Article

    An update of the searches for charginos and gravitinos is presented, based on a data sample corresponding to the 158 pb −1 recorded by the DELPHI detector in 1998, at a centre-of-mass energy of 189 GeV. No evidence for a signal was found. The lower mass limits are 4–5 GeV/ c 2 higher than those obtained at a centre-of-mass energy of 183 GeV. The ( μ, M 2) MSSM domain excluded by combining the chargino searches with neutralino searches at the Z resonance implies a limit on the mass of the lightest neutralino which, for a heavy sneutrino, is constrained to be above 31.0 GeV/ c 2 for tan β≥ 1.