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arXiv · hep-ph/9411202

Relativistic Effects in S-Wave Quarkonium Decay

A. P. Martynenko·V. A. Saleev
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Abstract

The decay widths of S-wave quarkonia ($\etc,\etb\to \gg{~~and~~} \J,\U\to\ee$) are calculated on the basis of a quasipotential approach. The nontrivial dependence on relative quark motion of decay amplitude is taken into consideration via quarkonium wave function. It is shown that relativistic corrections may be large (10-50 %) and comparable with QCD corrections.

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A. P. Martynenko, V. A. Saleev. 1995-01-04. Relativistic Effects in S-Wave Quarkonium Decay. https://doi.org/10.1007/bf00559302

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