Phases and amplitudes in inclusive $\Psi$ and $\Psi'$ decays
Abstract
In inclusive decays of the $\Psi$ (3097), electromagnetic and gluonic annihilation amplitudes add incoherently, namely they are 90$^\circ$ out of phase. We argue that this incoherence must persist in each exclusive decay channel. For inclusive $\Psi'$ (3686) decays, we suggest the absence of a significant direct annihilation amplitude into three gluons and propose a new amplitude via QCD anomalies and the $h_c$ (3526) off shell. Phenomenological implications for exclusive decay channels are pointed out.
- Publication:
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Physics Letters B
- Pub Date:
- October 1999
- DOI:
- arXiv:
- arXiv:hep-ph/9906357
- Bibcode:
- 1999PhLB..462..324G
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 10 pages