| Literature DB >> 17155676 |
M Ablikim1, J Z Bai, Y Ban, J G Bian, X Cai, H F Chen, H S Chen, H X Chen, J C Chen, Jin Chen, Y B Chen, S P Chi, Y P Chu, X Z Cui, Y S Dai, L Y Diao, Z Y Deng, Q F Dong, S X Du, J Fang, S S Fang, C D Fu, C S Gao, Y N Gao, S D Gu, Y T Gu, Y N Guo, Y Q Guo, Z J Guo, F A Harris, K L He, M He, Y K Heng, H M Hu, T Hu, G S Huang, X T Huang, X B Ji, X S Jiang, X Y Jiang, J B Jiao, D P Jin, S Jin, Yi Jin, Y F Lai, G Li, H B Li, H H Li, J Li, R Y Li, S M Li, W D Li, W G Li, X L Li, X N Li, X Q Li, Y L Li, Y F Liang, H B Liao, B J Liu, C X Liu, F Liu, Fang Liu, H H Liu, H M Liu, J Liu, J B Liu, J P Liu, Q Liu, R G Liu, Z A Liu, Y C Lou, F Lu, G R Lu, J G Lu, C L Luo, F C Ma, H L Ma, L L Ma, Q M Ma, X B Ma, Z P Mao, X H Mo, J Nie, S L Olsen, H P Peng, R G Ping, N D Qi, H Qin, J F Qiu, Z Y Ren, G Rong, L Y Shan, L Shang, C P Shen, D L Shen, X Y Shen, H Y Sheng, H S Sun, J F Sun, S S Sun, Y Z Sun, Z J Sun, Z Q Tan, X Tang, G L Tong, G S Varner, D Y Wang, L Wang, L L Wang, L S Wang, M Wang, P Wang, P L Wang, W F Wang, Y F Wang, Z Wang, Z Y Wang, Zhe Wang, Zheng Wang, C L Wei, D H Wei, N Wu, X M Xia, X X Xie, G F Xu, X P Xu, Y Xu, M L Yan, H X Yang, Y X Yang, M H Ye, Y X Ye, Z Y Yi, G W Yu, C Z Yuan, J M Yuan, Y Yuan, S L Zang, Y Zeng, Yu Zeng, B X Zhang, B Y Zhang, C C Zhang, D H Zhang, H Q Zhang, H Y Zhang, J W Zhang, J Y Zhang, S H Zhang, X M Zhang, X Y Zhang, Yiyun Zhang, Z P Zhang, D X Zhao, J W Zhao, M G Zhao, P P Zhao, W R Zhao, Z G Zhao, H Q Zheng, J P Zheng, Z P Zheng, L Zhou, N F Zhou, K J Zhu, Q M Zhu, Y C Zhu, Y S Zhu, Yingchun Zhu, Z A Zhu, B A Zhuang, X A Zhuang, B S Zou.
Abstract
Using a data sample of 58 x 10(6) J/psi decays collected with the Beijing Spectrometer II detector at the Beijing Electron Positron Collider, searches for invisible decays of eta and eta' in J/psi to phi eta and phi eta' are performed. The phi signals, which are reconstructed in K+K- final states, are used to tag the eta and eta' decays. No signals are found for the invisible decays of either eta or eta', and upper limits at the 90% confidence level are determined to be 1.65 x 10(-3) for the ratio B(eta-->invisible)/B(eta --> gamma gamma) and 6.69 x 10(-2) for B(eta' --> invisible)/B(eta' --> gammagamma). These are the first searches for eta and eta' decays into invisible final states.Entities:
Year: 2006 PMID： 17155676 DOI： 10.1103/PhysRevLett.97.202002
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161