Leptonic widths of high excitations in heavy quarkonia

Details Leptonic widths of high excitations in heavy quarkonia Leptonic widths of high excitations in heavy quarkonia

2004-11-22

arxiv.org/abs/hep-ph/0411291v1

J.Phys.G31:417-426,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages revtex4

Scientific paper

10.1088/0954-3899/31/5/012

Agreement with the measured electronic widths of the $\psi(4040)$, $\psi(4415)$, and $\Upsilon (11019)$ resonances is shown to be reached if two effects are taken into account: a flattening of the confining potential at large distances and a total screening of the gluon-exchange interaction at $r\ga 1.2$ fm. The leptonic widths of the unobserved $\Upsilon(7S)$ and $\psi(5S)$ resonances: $\Gamma_{e^+e^-}(\Upsilon (7S))=0.11$ keV and $\Gamma(\psi(5S))\approx 0.54$ keV are predicted.

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