Results from Charmonium Decays

TL;DR

This paper reviews recent experimental findings on charmonium decays from BES and CLEOc, highlighting measurements of decay phases, the rho pi puzzle, non-DDbar decays, and chi_cJ decay studies, advancing QCD understanding.

Contribution

It provides a comprehensive review of new experimental results on charmonium decays, including phase measurements and decay puzzles, contributing to QCD insights.

Findings

Measurement of the relative phase between strong and electromagnetic decays of psi'

Study of the rho pi puzzle in J/psi and psi' decays

Search for non-DDbar decays of psi''

Abstract

Recent results from BES and CLEOc experiments on charmonium decays using J/psi, psi' and psi'' data samples collected in e+e- annihilation are reviewed, including the measurement of the relative phase between strong and electromagnetic decays of psi', the study of the ``rho pi puzzle'' in J/psi and psi' decays, and the search for the non-DDbar decays of psi''. The decays of chi_cJ produced in psi' radiative transition are also reviewed. These new results shed light on the understanding of QCD.