Search for Inclusive ${\mathit{b}\to \mathit{sl}}^{+}{\mathit{l}}^{-}$

We have searched for the effective flavor changing neutral-current decays $b\to {\mathrm{sl}}^{+}{l}^{-}$ using an inclusive method. We set upper limits on the branching ratios $B(b\to {\mathrm{se}}^{+}{e}^{-})<5.7\mathrm{}\times {10}^{-5\mathrm{}}$, $B(b\to s{\mu }^{+}{\mu }^{-})<5.8\mathrm{}\times {10}^{-5\mathrm{}}$, and $B(b\to {\mathrm{se}}^{\pm }{\mu }^{\mp })<2.2\mathrm{}\times {10}^{-5\mathrm{}}$ [at 90% confidence level (C.L.)]. Combing the dielectron and dimuon decay modes we find $B(b\to {\mathrm{sl}}^{+}{l}^{-})<4.2\mathrm{}\times {10}^{-5\mathrm{}}$ (at 90% C.L.).