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 $107{\mathrm{pb}}^{\ensuremath{-}1}$ of data in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ collected in 1992--1995 by the CDF experiment. Finding no events that pass our selection, we set $\ensuremath{\sigma}\ifmmode\times\else\texttimes\fi{}\mathrm{BR}$ 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 ${\ensuremath{\lambda}}_{121}^{\ensuremath{'}}$ coupling. We compare our results to the next-to-leading order calculations for gluino and squark production cross sections and set lower limits on $M(\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g})$, $M({\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{t}}_{1})$, and $M(\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{q})$.