Search forR-Parity Violating Supersymmetry Using Like-Sign Dielectrons inpp¯Collisions at√s=1.8TeV

We present a search for like-sign dielectron plus multijet events using $107{\mathrm{pb}}^{-1\mathrm{}}$ of data in $p\overline{p}$ collisions at $\sqrt{s}=1.8\mathrm{}\mathrm{TeV}$ collected in 1992–1995 by the CDF experiment. Finding no events that pass our selection, we set $\sigma \times \mathrm{BR}$ limits on two supersymmetric processes that can produce this experimental signature: gluino-gluino or squark-antisquark production with $R$-parity violating decays of the charm squark or lightest neutralino via a nonzero ${\lambda }_{121}^{\prime }$ coupling. We compare our results to the next-to-leading order calculations for gluino and squark production cross sections and set lower limits on $M\left(\tilde{g}\right)$, $M\left({\tilde{t}}_1\right)$, and $M\left(\tilde{q}\right)$.