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. 2010 Apr 2;104(13):132002.
doi: 10.1103/PhysRevLett.104.132002. Epub 2010 Mar 30.

Measurements of h(c)(1P(1)) in psi' decays

M Ablikim  1 , M N Achasov, L An, Q An, Z H An, J Z Bai, Y Ban, N Berger, J M Bian, I Boyko, R A Briere, V Bytev, X Cai, G F Cao, X X Cao, J F Chang, G Chelkov, G Chen, H S Chen, J C Chen, L P Chen, M L Chen, P Chen, S J Chen, Y B Chen, Y P Chu, D Cronin-Hennessy, H L Dai, J P Dai, D Dedovich, Z Y Deng, I Denysenko, M Destefanis, Y Ding, L Y Dong, M Y Dong, S X Du, M Y Duan, J Fang, C Q Feng, C D Fu, J L Fu, Y Gao, C Geng, K Goetzen, W X Gong, M Greco, S Grishin, Y T Gu, A Q Guo, L B Guo, Y P Guo, S Q Han, F A Harris, K L He, M He, Z Y He, Y K Heng, Z L Hou, H M Hu, J F Hu, T Hu, X W Hu, B Huang, G M Huang, J S Huang, X T Huang, Y P Huang, C S Ji, Q Ji, X B Ji, X L Ji, L K Jia, L L Jiang, X S Jiang, J B Jiao, D P Jin, S Jin, S Komamiya, W Kuehn, S Lange, J K C Leung, Cheng Li, Cui Li, D M Li, F Li, G Li, H B Li, J Li, J C Li, Lei Li, Lu Li, Q J Li, W D Li, W G Li, X L Li, X N Li, X Q Li, X R Li, Y X Li, Z B Li, H Liang, T R Liang, Y T Liang, Y F Liang, G R Liao, X T Liao, B J Liu, C L Liu, C X Liu, C Y Liu, F H Liu, Fang Liu, Feng Liu, G C Liu, H Liu, H B Liu, H M Liu, H W Liu, J Liu, J P Liu, K Liu, K Y Liu, Q Liu, S B Liu, X H Liu, Y B Liu, Y F Liu, Y W Liu, Yong Liu, Z A Liu, G R Lu, J G Lu, Q W Lu, X R Lu, Y P Lu, C L Luo, M X Luo, T Luo, X L Luo, C L Ma, F C Ma, H L Ma, Q M Ma, X Ma, X Y Ma, M Maggiora, Y J Mao, Z P Mao, J Min, X H Mo, N Yu Muchnoi, Y Nefedov, F P Ning, S L Olsen, Q Ouyang, M Pelizaeus, K Peters, J L Ping, R G Ping, R Poling, C S J Pun, M Qi, S Qian, C F Qiao, J F Qiu, G Rong, X D Ruan, A Sarantsev, M Shao, C P Shen, X Y Shen, H Y Sheng, S Sonoda, S Spataro, B Spruck, D H Sun, G X Sun, J F Sun, S S Sun, X D Sun, Y J Sun, Y Z Sun, Z J Sun, Z T Sun, C J Tang, X Tang, X F Tang, H L Tian, D Toth, G S Varner, X Wan, B Q Wang, J K Wang, K Wang, L L Wang, L S Wang, P Wang, P L Wang, Q Wang, S G Wang, X D Wang, X L Wang, Y D Wang, Y F Wang, Y Q Wang, Z Wang, Z G Wang, Z Y Wang, D H Wei, S P Wen, U Wiedner, L H Wu, N Wu, W Wu, Y M Wu, Z Wu, Z J Xiao, Y G Xie, G F Xu, G M Xu, H Xu, Min Xu, Ming Xu, X P Xu, Y Xu, Z Z Xu, Z Xue, L Yan, W B Yan, Y H Yan, H X Yang, M Yang, P Yang, S M Yang, Y X Yang, M Ye, M H Ye, B X Yu, C X Yu, L Yu, C Z Yuan, Y Yuan, Y Zeng, B X Zhang, B Y Zhang, C C Zhang, D H Zhang, H H Zhang, H Y Zhang, J W Zhang, J Y Zhang, J Z Zhang, L Zhang, S H Zhang, X Y Zhang, Y Zhang, Y H Zhang, Z P Zhang, C Zhao, H S Zhao, Jiawei Zhao, Jingwei Zhao, Lei Zhao, Ling Zhao, M G Zhao, Q Zhao, S J Zhao, T C Zhao, X H Zhao, Y B Zhao, Z G Zhao, A Zhemchugov, B Zheng, J P Zheng, Y H Zheng, Z P Zheng, B Zhong, J Zhong, L Zhou, Z L Zhou, C Zhu, K Zhu, K J Zhu, Q M Zhu, X W Zhu, Y S Zhu, Z A Zhu, J Zhuang, B S Zou, J H Zou, J X Zuo, P Zweber; BESIII Collaboration
Affiliations

Measurements of h(c)(1P(1)) in psi' decays

M Ablikim et al. Phys Rev Lett. .

Abstract

We present measurements of the charmonium state h(c)(1P(1)) made with 106x10(6) psi' events collected by BESIII at BEPCII. Clear signals are observed for psi'-->pi0 h(c) with and without the subsequent radiative decay h(c)-->gamma eta(c). First measurements of the absolute branching ratios B(psi'-->pi0 h(c)) = (8.4+/-1.3+/-1.0) x 10(-4) and B(h(c)-->gamma eta(c)) = (54.3+/-6.7+/-5.2)% are presented. A statistics-limited determination of the previously unmeasured h(c) width leads to an upper limit Gamma(h(c))<1.44 MeV (90% confidence). Measurements of M(h(c)) = 3525.40+/-0.13+/-0.18 MeV/c2 and B(psi'-->pi0 h(c)) x B(h(c)-->gamma eta(c)) = (4.58+/-0.40+/-0.50) x 10(-4) are consistent with previous results.

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