Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-10-31
Annals Phys. 319 (2005) 1-12
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 3 figures. To be published in Annals of Physics. Table 1 and references updated
Scientific paper
10.1016/j.aop.2005.02.004
The importance of measuring the non-$D \bar D$ decays of the $\psi'' = \psi(3770)$ resonance is discussed. These decays can shed light on a possible discrepancy between the total and $D \bar D$ cross sections at the $\psi''$, and on a proposed mechanism for enhancement of penguin amplitudes in $B$ meson decays through charm--anticharm annihilation. Measurements (including the $\psi''$ line shape) in states of definite G-parity and in inclusive charmless final states such as $\eta' + X$ are found to be particularly important.
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