Search for Color-Suppressed $B$ Hadronic Decay Processes with CLEO

Abstract

Using 3.1 fb${}^{-1}$ of data accumulated at the ${\rm Y}$(4S) by the CLEO-II detector, corresponding to 3.3 million $B\bar{B}$ pairs, we have searched for the color-suppressed $B$ hadronic decay processes: ${\bar{B}}^0\to D^0(D^{\ast 0})X^0$, where $X^0$ is a light neutral meson ${\pi }^0$, ${\rho }^0$, $\eta$, ${\eta }^{\prime }$ or $\omega$. No obvious signal is observed. We set 90 % C.L. upper limits on these modes, varying from $1.2\times 10^{-4}$ for ${\bar{B}}^0\to D^0{\pi }^0$ to $1.9\times 10^{-3}$ for ${\bar{B}}^0\to D^{\ast 0}{\eta }^{\prime }$.

14 page postscript file, postscript file also available through http://w4.lns.cornell.edu/public/CLNS

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