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arXiv · 1007.0084

On the leptonic partial widths of the excited psi states

X. H. Mo·C. Z. Yuan·P. Wang
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Abstract

The resonance parameters of the excited psi-family resonances, namely the psi(4040), psi(4160), and psi(4415), were determined by fitting the R-values measured by experiments. It is found that the previously reported leptonic partial widths of these states were merely one possible solutions among a four-fold ambiguity. By fitting the most precise experimental data on the R-values measured by the BES collaboration, this work presents all four sets of solutions. These results may affect the interpretation of the charmonium and charmonium-like states above 4GeV/c^2.

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X. H. Mo, C. Z. Yuan, P. Wang. 2010-07-01. On the leptonic partial widths of the excited psi states. https://doi.org/10.1103/physrevd.82.077501

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