Hadronic Decays of J/psi(1^{3}S_{1}) and psi'(2^{3}S_{1}) Through Vitrual Photons

TL;DR

This paper reevaluates the branching ratios of hadronic decays of J/psi and psi' mesons mediated by virtual photons using recent decay data and R-parameter measurements, suggesting previous estimates were overestimated.

Contribution

It provides updated, more accurate measurements of the branching ratios for virtual photon mediated hadronic decays of J/psi and psi' mesons.

Findings

Revised branching ratio for J/psi decays: 13.3%

Revised branching ratio for psi' decays: 1.65%

Previous estimates were overestimated.

Abstract

The latest data for J/psi and psi' leptonic decays, and the latest measurement of the R-parameter are used to show that the present summary values of the branching ratios of the virtual photon mediated hadronic decays of both J/psi and psi' are overestimated. The current best results are B(J/psi -> gamma^{*} -> h) = (13.3 +- 0.3)%, and B(psi' -> gamma^{*} -> h) = (1.65 +- 0.10)%.