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

TL;DR

This study searched for specific color-suppressed B meson decay processes using CLEO data but found no significant signals, setting upper limits on their occurrence rates.

Contribution

First search for these particular color-suppressed B decay modes with CLEO, establishing upper limits on their branching fractions.

Findings

No significant signals observed for the decay modes.

Upper limits set on branching fractions, ranging from 1.2×10⁻⁴ to 1.9×10⁻³.

Provides constraints for theoretical models of B decays.

Abstract

Using 3.1 fb$^{-1}$ of data accumulated at the $\Upsilon$(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: $\bar{B}^0 \to D^0 (D^{*0}) X^0$, where $X^0$ is a light neutral meson $\pi^0$, $\rho^0$, $\eta$, $\eta'$ 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 $\bar{B}^0 \to D^{*0} \eta'$.