Experimental study of psi' decays to K+K- pi^0 and K+K- eta

• Published in: arXiv.org 2012-10
• Main Authors: Ambrose, D J, An, Z H, Becker, J, Berger, N, Bondarenko, O, Boyko, I, Briere, R A, Cakir, O, Cao, G F, Chelkov, G, Chen, G, Chen, H S, Chen, Y B, Cheng, H P, Chu, Y P, Cronin-Hennessy, D, Dedovich, D, Fang, J, Fava, L, Feng, C Q, Fu, J L, Geng, C, Gong, W X, Gradl, W, Gu, M H, Gu, Y T, Guo, Y P, M He, Hu, H M, Huang, G M, Hussain, T, Ji, X B, Ji, X L, Jiao, J B, Jiao, Z, Jin, S, Jing, F F, Kalantar-Nayestanaki, N, Li, C H, Cheng, Li, Li, H B, Li, Lei, Li, X Q, Liang, H, Liang, Y T, Liao, G R, Liu, H, Liu, P L, Liu, X H, Liu, Y, Lu, Y P, Luo, C L, Ma, F C, S Ma, Mao, Z P, Mitchell, R E, Nefedov, Y, Ning, Z, Qin, Z H, Ruan, X D, Shao, M, Spataro, S, Spruck, B, Sun, G X, Sun, J F, Sun, Z J, Tang, C J, Tian, H L, Ullrich, M, Varner, G S, Wang, S G, Wang, Z G, Weidenkaff, P, W Wu, Xia, L G, Xie, Y G, H Xu, Xu, Z R, Xue, F, Yang, Y X, H Ye, Ye, M H, Yu, B X, Yu, C X, Yu, S P, Yuan, C Z, Yuan, Y, Zeng, Y, Zhang, B X, Zhang, C C, Zhang, H Y, Zhang, J Y, Zhang, Y, Zhang, Y S, Zhao, K X, Zhao, M G, Zhao, S J, Zhao, X H, Zhao, Z G, Zhu, K J
• Format: Article
• Language: English
• Subjects: Decay; Helicity
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1208.2320

Using \((106\pm4)\times 10^6\) \(\psip\) events accumulated with the BESIII detector at the BEPCII \(e^+e^-\) collider, we present measurements of the branching fractions for psi' decays to \(K^{+}K^{-}\pi^{0}\) and \(K^{+}K^{-}\eta\). In these final states, the decay \(\psi'\to K_2^{*}(1430)^+K^-+c.c.\) is observed for the first time, and its branching fraction is measured to be \((7.12\pm{0.62}{\rm (stat.)}^{+1.13}_{-0.61}{\rm (syst.)})\times 10^{-5}\), which indicates a violation of the helicity selection rule in \(\psip\) decays. The branching fractions of \(\psi'\to K^*(892)^+K^-+c.c., \phi\eta, \phi\pi^0\) are also measured. The measurements are used to test the QCD predictions on charmonium decays.