Recent Results on $\psip$ Decays at Bes

TL;DR

This paper reports recent measurements of $\\psip$ decays, including vector-pseudoscalar modes and proton-antiproton-pion/eta channels, using a large dataset from BESII, and also measures cross sections and form factors at specific energies.

Contribution

It provides new experimental results on $\\psip$ decay modes and cross sections at multiple energies, enhancing understanding of charmonium decays and e+e- interactions.

Findings

Measured 10 VP decay modes of $\\psip$.

Determined cross sections and form factors at 3.650, 3.686, and 3.773 GeV.

Abstract

Recent results on $\psip$ decays, including 10 Vector + Pseudoscalar (VP) modes and $p\bar{p}\pi^0(\eta)$, are reported with $14\times10^6$ $\psip$ events collected with the BESII detector. Cross sections and form factors for $e^+e^- \to \wpi$, $\rho\eta$, and $\rho\etap$ at the center of mass energies of 3.650, 3.686, and 3.773 GeV are measured simultaneously.