Search for Third Generation Leptoquarks in p¯p Collisions at s=1.8TeV

Le résumé fourni par la source

We present the results of a search for third generation leptoquark (LQ) pairs in $110\ifmmode\pm\else\textpm\fi{}8{\mathrm{pb}}^{\ensuremath{-}1}$of $\overline{p}p$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ recorded by the Collider Detector at Fermilab. We assume third generation leptoquarks decay to a $\ensuremath{\tau}$ lepton and a $b$ quark with branching ratio $\ensuremath{\beta}$. We observe one candidate event, consistent with standard model background expectations. We place upper limits on $\ensuremath{\sigma}(\overline{p}p\ensuremath{\rightarrow}\mathrm{LQ}\overline{\mathrm{LQ}})\ifmmode \dot{}\else \.{}\fi{}{\ensuremath{\beta}}^{2}$ as a function of the leptoquark mass ${M}_{\mathrm{LQ}}$. We exclude at 95% confidence level scalar leptoquarks with ${M}_{\mathrm{LQ}}<99\mathrm{GeV}{/c}^{2}$, gauge vector leptoquarks with ${M}_{\mathrm{LQ}}<225\mathrm{GeV}{/c}^{2}$, and nongauge vector leptoquarks with ${M}_{\mathrm{LQ}}<170\mathrm{GeV}{/c}^{2}$ for $\ensuremath{\beta}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1$.

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