Search for Gluinos and Squarks Using Like-Sign Dileptons in pp¯ Collisions at s=1.8 TeV

Le résumé fourni par la source

We present results of the first search for like-sign dilepton ( ${e}^{\ifmmode\pm\else\textpm\fi{}}{e}^{\ifmmode\pm\else\textpm\fi{}}$, ${e}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\mu}}^{\ifmmode\pm\else\textpm\fi{}}$, ${\ensuremath{\mu}}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\mu}}^{\ifmmode\pm\else\textpm\fi{}}$) events associated with multijets and large missing energy using $106{\mathrm{pb}}^{\ensuremath{-}1}$ of data in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ collected during 1992--1995 by the CDF experiment. Finding no events that pass our selection, we examine pair production of gluinos ( $\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}$) and squarks ( $\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{q}$) in a constrained framework of the minimal supersymmetric standard model. At $\mathrm{tan}\ensuremath{\beta}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}2$ and $\ensuremath{\mu}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}\ensuremath{-}800\mathrm{GeV}{/c}^{2}$, we set $95%$ confidence level limits of ${M}_{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}}>221\mathrm{GeV}{/c}^{2}$ for ${M}_{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}}\ensuremath{\simeq}{M}_{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{q}}$, and ${M}_{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}}>168\mathrm{GeV}{/c}^{2}$ for ${M}_{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{q}}\ensuremath{\gg}{M}_{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}}$, both with small variation as a function of $\ensuremath{\mu}$.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.