Psi'' decays to charmless final states

Abstract

The importance of measuring the non-$D\bar{D}$ decays of the ${\psi }^{\prime \prime }=\psi (3770)$ resonance is discussed. These decays can shed light on a possible discrepancy between the total and $D\bar{D}$ cross sections at the ${\psi }^{\prime \prime }$, and on a proposed mechanism for enhancement of penguin amplitudes in $B$ meson decays through charm--anticharm annihilation. Measurements (including the ${\psi }^{\prime \prime }$ line shape) in states of definite G-parity and in inclusive charmless final states such as ${\eta }^{\prime }+X$ are found to be particularly important.

Comments: 13 pages, 3 figures. To be published in Annals of Physics. Table 1 and references updated