Search for Trilepton Signatures from Associated Gaugino Pair Production

We report on a search for the trilepton decay signature from the associated production of supersymmetric gaugino pairs, ${\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\chi}}}_{1}^{\ifmmode\pm\else\textpm\fi{}}{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\chi}}}_{2}^{0}$, within the context of minimal supersymmetric models that conserve $R$ parity. This search uses $95{\mathrm{pb}}^{\ensuremath{-}1}$ of $p\overline{p}$ data taken at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ with the D0 detector. No evidence of a trilepton signature has been found, and a limit on the product of cross section times branching fraction to trileptons is given as a function of ${\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\chi}}}_{1}^{\ifmmode\pm\else\textpm\fi{}}$ mass.