Status of ${\psi }^{\prime \prime }$ Decays to Charmless Final States

Abstract

The non-$D\bar{D}$ decays of the $\ppp = ψ(3770)$ resonance are reviewed and possibilities for further measurements are noted. These decays can shed light on S--D mixing, the ``missing'' ${\psi }^{\prime }=\psi (3686)$ decays, a possible discrepancy between the total and $D\bar{D}$ cross sections at the $\ppp$, and rescattering effects contributing to enhanced $b\to s$ penguin amplitudes in $B$ meson decays.

17 pages, 3 figures. Submitted to Physical Review D. Small changes in text; references added and updated