Efficiency Correction in the Branching Fraction Measurements of psi(2S)   Hadronic Decays
  The detection efficiency correction for the particle identification and kinematic fit selection criteria is investigated for the branching fraciton measurements in the psi(2S) decays into omega pi pi, b1 pi, omega f2(1270), omega K K, omega p pbar, phi pi pi, phi f0(980), phi K K and phi p pbar final states using 4 millions psi(2S) data sample coolected at BEPC/BES. Based on the corrected efficiencies, the preliminary results of these decay channels have been obtained, and the "12%" rule predicted by perturbative QCD theory tested. 
Wang Wen-Feng, Zhu Yong-sheng, Zhang Xue-yao