Observation of an Axial-Vector State in the Study of the Decay ψ(3686)→ϕηη^{'}.

Journal: Physical Review Letters
Published:
Abstract

Using (2712.4±14.3)×10^{6} ψ(3686) events collected with the BESIII detector at BEPCII, a partial wave analysis of the decay ψ(3686)→ϕηη^{'} is performed with the covariant tensor approach. In addition to the established states h_{1}(1900) and ϕ(2170), an axial-vector state with a mass near 2.3  GeV/c^{2} is observed for the first time. Its mass and width are measured to be 2316±9_{stat}±30_{syst}  MeV/c^{2} and 89±15_{stat}±26_{syst}  MeV, respectively. The product branching fractions of B[ψ(3686)→X(2300)η^{'}]B[X(2300)→ϕη] and B[ψ(3686)→X(2300)η]B[X(2300)→ϕη^{'}] are determined to be (4.8±1.3_{stat}±0.7_{syst})×10^{-6} and (2.2±0.7_{stat}±0.7_{syst})×10^{-6}, respectively. The branching fraction B[ψ(3686)→ϕηη^{'}] is measured for the first time to be (3.14±0.17_{stat}±0.24_{syst})×10^{-5}. The first uncertainties are statistical and the second are systematic.

Authors
M Ablikim, M Achasov, P Adlarson, O Afedulidis, X Ai, R Aliberti, A Amoroso, Q An, Y Bai, O Bakina, I Balossino, Y Ban, H-r Bao, V Batozskaya, K Begzsuren, N Berger, M Berlowski, M Bertani, D Bettoni, F Bianchi, E Bianco, A Bortone, I Boyko, R Briere, A Brueggemann, H Cai, X Cai, A Calcaterra, G Cao, N Cao, S Cetin, J Chang, W Chang, G Che, G Chelkov, C Chen, C Chen, Chao Chen, G Chen, H Chen, M Chen, S Chen, S Chen, S Chen, T Chen, X Chen, X Chen, Y Chen, Y Chen, Z Chen, Z Chen, S Choi, X Chu, G Cibinetto, F Cossio, J Cui, H Dai, J Dai, A Dbeyssi, R De Boer, D Dedovich, C Deng, Z Deng, A Denig, I Denysenko, M Destefanis, F De Mori, B Ding, X Ding, Y Ding, Y Ding, J Dong, L Dong, M Dong, X Dong, M Du, S Du, Z Duan, P Egorov, Y Fan, J Fang, J Fang, S Fang, W Fang, Y Fang, R Farinelli, L Fava, F Feldbauer, G Felici, C Feng, J Feng, Y Feng, K Fischer, M Fritsch, C Fu, J Fu, Y Fu, H Gao, Y Gao, Yang Gao, S Garbolino, I Garzia, L Ge, P Ge, Z Ge, C Geng, E Gersabeck, A Gilman, K Goetzen, L Gong, W Gong, W Gradl, S Gramigna, M Greco, M Gu, Y Gu, C Guan, Z Guan, A Guo, L Guo, M Guo, R Guo, Y Guo, A Guskov, J Gutierrez, K Han, T Han, X Hao, F Harris, K He, K He, F Heinsius, C Heinz, Y Heng, C Herold, T Holtmann, P Hong, G Hou, X Hou, Y Hou, Z Hou, B Hu, H Hu, J Hu, T Hu, Y Hu, G Huang, K Huang, L Huang, X Huang, Y Huang, T Hussain, F Hölzken, N Hüsken, N In Der Wiesche, M Irshad, J Jackson, S Janchiv, J Jeong, Q Ji, W Ji, X Ji, X Ji, Y Ji, X Jia, Z Jia, D Jiang, H Jiang, P Jiang, S Jiang, T Jiang, X Jiang, Y Jiang, J Jiao, J Jiao, Z Jiao, S Jin, Y Jin, M Jing, X Jing, T Johansson, S Kabana, N Kalantar Nayestanaki, X Kang, X Kang, M Kavatsyuk, B Ke, V Khachatryan, A Khoukaz, R Kiuchi, O Kolcu, B Kopf, M Kuessner, X Kui, N Kumar, A Kupsc, W Kühn, J Lane, P Larin, L Lavezzi, T Lei, Z Lei, H Leithoff, M Lellmann, T Lenz, C Li, C Li, C Li, Cheng Li, D Li, F Li, G Li, H Li, H Li, H Li, Hui Li, J Li, J Li, Ke Li, L Li, L Li, Lei Li, M Li, P Li, Q Li, Q Li, R Li, S Li, T Li, W Li, W Li, X Li, X Li, X Li, Xiaoyu Li, Y Li, Z Li, Z Li, C Liang, H Liang, H Liang, Y Liang, Y Liang, G Liao, L Liao, Y Liao, J Libby, A Limphirat, D Lin, T Lin, B Liu, B Liu, C Liu, C Liu, F Liu, Fang Liu, Feng Liu, G Liu, H Liu, H Liu, Huanhuan Liu, Huihui Liu, J Liu, J Liu, K Liu, Ke Liu, L Liu, L Liu, Lu Liu, M Liu, P Liu, Q Liu, S Liu, T Liu, W Liu, W Liu, X Liu, X Liu, Y Liu, Y Liu, Z Liu, Z Liu, Z Liu, X Lou, F Lu, H Lu, J Lu, X Lu, Y Lu, Y Lu, Z Lu, C Luo, M Luo, T Luo, X Luo, X Lyu, Y Lyu, F Ma, H Ma, H Ma, J Ma, L Ma, M Ma, Q Ma, R Ma, X Ma, X Ma, Y Ma, Y Ma, F Maas, M Maggiora, S Malde, A Mangoni, Y Mao, Z Mao, S Marcello, Z Meng, J Messchendorp, G Mezzadri, H Miao, T Min, R Mitchell, X Mo, B Moses, N Muchnoi, J Muskalla, Y Nefedov, F Nerling, I Nikolaev, Z Ning, S Nisar, Q Niu, W Niu, Y Niu, S Olsen, Q Ouyang, S Pacetti, X Pan, Y Pan, A Pathak, P Patteri, Y Pei, M Pelizaeus, H Peng, Y Peng, K Peters, J Ping, R Ping, S Plura, V Prasad, F Qi, H Qi, H Qi, M Qi, T Qi, S Qian, W Qian, C Qiao, X Qiao, J Qin, L Qin, X Qin, Z Qin, J Qiu, S Qu, Z Qu, C Redmer, K Ren, A Rivetti, M Rolo, G Rong, Ch Rosner, S Ruan, N Salone, A Sarantsev, Y Schelhaas, K Schoenning, M Scodeggio, K Shan, W Shan, X Shan, Z Shang, J Shangguan, L Shao, M Shao, C Shen, H Shen, W Shen, X Shen, B Shi, H Shi, J Shi, J Shi, Q Shi, R Shi, S Shi, X Shi, J Song, T Song, W Song, Y Song, Y Song, S Sosio, S Spataro, F Stieler, Y Su, G Sun, G Sun, H Sun, J Sun, K Sun, L Sun, S Sun, T Sun, W Sun, Y Sun, Y Sun, Y Sun, Z Sun, Z Sun, C Tang, G Tang, J Tang, Y Tang, L Tao, Q Tao, M Tat, J Teng, V Thoren, W Tian, Y Tian, Z Tian, I Uman, Y Wan, S Wang, B Wang, Bo Wang, D Wang, F Wang, H Wang, J Wang, K Wang, L Wang, M Wang, Meng Wang, N Wang, S Wang, S Wang, T Wang, T Wang, W Wang, W Wang, X Wang, X Wang, X Wang, X Wang, X Wang, Y Wang, Y Wang, Y Wang, Y Wang, Y Wang, Yaqian Wang, Yi Wang, Z Wang, Z Wang, Ziyi Wang, D Wei, D Wei, F Weidner, S Wen, Y Wen, U Wiedner, G Wilkinson, M Wolke, L Wollenberg, C Wu, J Wu, L Wu, L Wu, X Wu, X Wu, Y Wu, Y Wu, Y Wu, Z Wu, L Xia, X Xian, B Xiang, T Xiang, D Xiao, G Xiao, S Xiao, Y Xiao, Z Xiao, C Xie, X Xie, Y Xie, Y Xie, Y Xie, Z Xie, T Xing, C Xu, C Xu, G Xu, H Xu, Q Xu, Q Xu, W Xu, W Xu, X Xu, Y Xu, Z Xu, Z Xu, F Yan, L Yan, W Yan, W Yan, X Yan, H Yang, H Yang, H Yang, Tao Yang, Y Yang, Y Yang, Yifan Yang, Z Yang, Z Yao, M Ye, M Ye, J Yin, Z You, B Yu, G Yu, J Yu, T Yu, X Yu, Y Yu, C Yuan, J Yuan, L Yuan, S Yuan, Y Yuan, Z Yuan, C Yue, A Zafar, F Zeng, S Zeng, X Zeng, Y Zeng, Y Zeng, X Zhai, Y Zhai, Y Zhan, A Zhang, B Zhang, B Zhang, D Zhang, G Zhang, H Zhang, H Zhang, H Zhang, H Zhang, H Zhang, H Zhang, J Zhang, J Zhang, J Zhang, J Zhang, J Zhang, J Zhang, J Zhang, J Zhang, J Zhang, Jianyu Zhang, Lei Zhang, P Zhang, Q Zhang, R Zhang, Shuihan Zhang, Shulei Zhang, X Zhang, X Zhang, X Zhang, Y Zhang, Y Zhang, Y Zhang, Yan Zhang, Yao Zhang, Z Zhang, Z Zhang, Z Zhang, Z Zhang, Z Zhang, G Zhao, J Zhao, J Zhao, Lei Zhao, Ling Zhao, M Zhao, R Zhao, S Zhao, Y Zhao, Y Zhao, Z Zhao, A Zhemchugov, B Zheng, J Zheng, W Zheng, Y Zheng, B Zhong, X Zhong, H Zhou, J Zhou, L Zhou, X Zhou, X Zhou, X Zhou, Y Zhou, J Zhu, K Zhu, L Zhu, L Zhu, S Zhu, S Zhu, T Zhu, W Zhu, Y Zhu, Z Zhu, J Zou, J Zu