Limits for non-zero mass photinos have been calculated. When interpreted as a supersymmetry search it results in a lower selectron mass limit of 22.2 GeV/c/sup 2/ for the case of massless photinos. This cross section upper limit applies to any process which produces anomalous single electron events with missing transverse momentum. No events of this type were observed in the original search of 123 pb/sup -1/ of data, resulting in a cross section limit of less than 2.4 x 10/sup -2/ pb (at the 95% CL) within the detector acceptance. Thus, the experimental signature of the process is a single electron in the detector with a large unbalanced tranverse momentum. This electron is produced with large p perpendicular with respect to the beam pipe, since it must balance the transverse momentum carried off by the photinos. The selectron is assumed to immediately decay into an electron and photino. The photino is assumed to be the lightest supersymmetric particle, and as such, does not interact in the detector, thereby escaping detection very much like a neutrino. gamma.-tilde, in the supersymmetric analog of Compton scattering. The photon and electron then produce a selectron and a photino, more ». This latter electron is assumed to continue down the beam pipe undetected. In this reaction the selectrons, e-tilde, are assumed produced by the interaction of one of initial state electrons with a photon radiated from the other initial state electron. The experimental search done was based upon hypothetical reaction in e/sup +/e/sup -/ interactions at PEP center of mass energies of 29 GeV. « lessĪn experimental search for selectrons, the supersymmetric partner of the electron, has been performed at the PEP storage ring at SLAC using the Mark II detector. This thesis presents experimental results from the ASP detector which took data on e on the wino mass.
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