Recent BES Results on psi' Decay

TL;DR

This paper reports on extensive measurements of psi' decays, testing the 12% rule, analyzing decay phases, and improving the understanding of charmonium transitions with 14 million events.

Contribution

It provides new systematic measurements of charmonium decay channels, testing theoretical rules and refining experimental data on hadronic and radiative transitions.

Findings

Tested the 12% rule in charmonium decays

Measured phase between strong and electromagnetic amplitudes

Improved accuracy of hadronic and radiative transition data

Abstract

With 14 Million psi' events, many two-body decay channels are studied, which include Vector Pseudoscalar, Vector Tensor, Pseudoscalar Pseudoscalar channels. Based on systematical measurements for charmonium decay, 12% rule is tested, the phase between strong and electromagnetic amplitudes is studied. In addition, hadronic and radiative transitions of charmonia are measured to improve experimental accuracy and test theoretical calculations.