Search for Charmless B→VV Decays

Le résumé fourni par la source

We have studied two-body charmless decays of the $B$ meson into the final states ${\ensuremath{\rho}}^{0}{\ensuremath{\rho}}^{0}$, ${K}^{*0}{\ensuremath{\rho}}^{0}$, ${K}^{*0}{K}^{*0}$, ${K}^{*0}{\overline{K}}^{*0}$, ${K}^{*+}{\ensuremath{\rho}}^{0}$, ${K}^{*+}{\overline{K}}^{*0}$, and ${K}^{*+}{K}^{*\ensuremath{-}}$ using only decay modes with charged daughter particles. Using $9.7\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected with the CLEO detector, we place $90%$ confidence level upper limits on the branching fractions $(1.4--14.1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, depending on final state and polarization.

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