1995•Journal of Physics G Nuclear and Particle PhysicsRequires access

Intermediate bound-state effects in the two-photon decay widths of pseudoscalar quarkonium

O Efetov, Marko Horbatsch, Roman Koniuk

Abstract

The effect of a bound quarkonium intermediate state on the two-photon decay width of pseudoscalar quarkonium is considered. It is found that the width is a rather sensitive function of the binding strength parameter for weak to intermediate strengths, but saturates at strong coupling. A comparison with experiment and previous calculations is made.

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Key concepts: Quarkonium, Pseudoscalar, Physics, Bound state, Photon, Particle physics, State (computer science), Coupling (piping)