psi(2S) Radiative Decay Measurements

Abstract

Using a sample of 14 million $\psip$ events collected with the BESII detector, branching fractions or upper limits on the branching fractions of $\psip$ decays into $γ\ppb$, $γ2(\pip\pim)$, $γ\kskp$, $γ\kap\kam\pip\pim$, $γ\kstarz\kam\pip+c.c.$, $γ\kstarz \kstarzb$, $γ\pip\pim\ppb$, $\gamma2(\kap\kam)$, $\gamma3(\pip\pim)$ and $\gamma2(\pip\pim)\kap\kam$ with hadron invariant mass less than 2.9$\gev/c^2$ are reported. We also report branching fractions of $\psip$ decays into $γ\ppb\piz$, $\ppb\piz\piz$, $2(\pip\pim)\piz$, $ω\pp$, $\ddot{I}‰f_2(1270)$, $b_1^{\pm }\ddot{I}{€}^{\mp }$, $\piz\kskp$, $K^\pmρ^\mp\ks$, $\piz2(\pip\pim)\kap\kam$ and $γ\piz2(\pip\pim)\kap\kam$.

14 pages, 20 figures, one number error is corrected