ηπ+ π- resonant structure around 1.8 GeV/c(2) and η(1405) in J/ψ → ωηπ+ π-.
Journal: Physical Review Letters
Published:
Abstract
We present results of a study of the decay J/ψ → ωηπ+ π- using a sample of (225.2 ± 2.8) × 10(6) J/ψ events collected by the BESIII detector, and report the observation of a new process J/ψ → ωX(1870) with a statistical significance of 7.2σ, in which X(1870) decays to a(0)(±)(980)π±. Fitting to ηπ+ π- mass spectrum yields a mass M = 1877.3 ± 6.3(stat)(-7.4)(+3.4)(syst) MeV/c(2), a width Γ = 57 ± 12(stat)(-4)(+19)(syst) MeV/c(2), and a product branching fraction B(J/ψ → ωX) × B(X→a(0)(±)(980)π±) × B(a(0) (±)(980) → ηπ±) = [1.50 ± 0.26(stat)(-0.36)(+0.72) (syst)] × 10(-4). Signals for J/ψ → ωf(1)(1285) and J/ψ → ω η(1405) are also clearly observed and measured.
Authors
M Ablikim, M Achasov, D Alberto, Q An, Z An, J Bai, R Baldini, Y Ban, J Becker, N Berger, M Bertani, J Bian, O Bondarenko, I Boyko, R Briere, V Bytev, X Cai, A Calcaterra, G Cao, X Cao, J Chang, G Chelkov, G Chen, H Chen, J Chen, M Chen, S Chen, Y Chen, Y Chen, H Cheng, Y Chu, D Cronin Hennessy, H Dai, J Dai, D Dedovich, Z Deng, I Denysenko, M Destefanis, Y Ding, L Dong, M Dong, S Du, R Fan, J Fang, S Fang, C Feng, C Fu, J Fu, Y Gao, C Geng, K Goetzen, W Gong, M Greco, S Grishin, M Gu, Y Gu, Y Guan, A Guo, L Guo, Y Guo, X Hao, F Harris, K He, M He, Z He, Y Heng, Z Hou, H Hu, J Hu, T Hu, B Huang, G Huang, J Huang, X Huang, Y Huang, T Hussain, C Ji, Q Ji, X Ji, X Ji, L Jia, L Jiang, X Jiang, J Jiao, Z Jiao, D Jin, S Jin, F Jing, N Kalantar Nayestanaki, M Kavatsyuk, S Komamiya, W Kuehn, J Lange, J K Leung, Cheng Li, Cui Li, D Li, F Li, G Li, H Li, J Li, K Li, Lei Li, N Li, Q Li, W Li, W Li, X Li, X Li, X Li, X Li, Z Li, H Liang, Y Liang, Y Liang, X Liao, B Liu, C Liu, C Liu, C Liu, F Liu, Fang Liu, Feng Liu, G Liu, H Liu, H Liu, H Liu, J Liu, K Liu, K Liu, Q Liu, S Liu, X Liu, X Liu, Y Liu, Y Liu, Yong Liu, Z Liu, Z Liu, H Loehner, G Lu, H Lu, J Lu, Q Lu, X Lu, Y Lu, C Luo, M Luo, T Luo, X Luo, C Ma, F Ma, H Ma, Q Ma, T Ma, X Ma, X Ma, M Maggiora, Q Malik, H Mao, Y Mao, Z Mao, J Messchendorp, J Min, R Mitchell, X Mo, N Muchnoi, Y Nefedov, I Nikolaev, Z Ning, S Olsen, Q Ouyang, S Pacetti, M Pelizaeus, K Peters, J Ping, R Ping, R Poling, C S Pun, M Qi, S Qian, C Qiao, X Qin, J Qiu, K Rashid, G Rong, X Ruan, A Sarantsev, J Schulze, M Shao, C Shen, X Shen, H Sheng, M Shepherd, X Song, S Sonoda, S Spataro, B Spruck, D Sun, G Sun, J Sun, S Sun, X Sun, Y Sun, Y Sun, Z Sun, Z Sun, C Tang, X Tang, H Tian, D Toth, G Varner, X Wan, B Wang, K Wang, L Wang, L Wang, M Wang, P Wang, P Wang, Q Wang, S Wang, X Wang, Y Wang, Y Wang, Y Wang, Z Wang, Z Wang, Z Wang, D Wei, Q Wen, S Wen, U Wiedner, L Wu, N Wu, W Wu, Z Wu, Z Xiao, Y Xie, G Xu, G Xu, H Xu, Q Xu, X Xu, Y Xu, Z Xu, Z Xu, L Yan, W Yan, Y Yan, H Yang, M Yang, T Yang, Y Yang, Y Yang, M Ye, M Ye, B Yu, C Yu, L Yu, S Yu, C Yuan, W Yuan, Y Yuan, A Zafar, A Zallo, Y Zeng, B Zhang, B Zhang, C Zhang, D Zhang, H Zhang, H Zhang, J Zhang, J Zhang, J Zhang, L Zhang, S Zhang, T Zhang, X Zhang, X Zhang, Y Zhang, Y Zhang, Z Zhang, Z Zhang, G Zhao, H Zhao, Jiawei Zhao, Jingwei Zhao, Lei Zhao, Ling Zhao, M Zhao, Q Zhao, S Zhao, T Zhao, X Zhao, Y Zhao, Z Zhao, Z Zhao, A Zhemchugov, B Zheng, J Zheng, Y Zheng, Z Zheng, B Zhong, J Zhong, L Zhong, L Zhou, X Zhou, X Zhou, C Zhu, K Zhu, K Zhu, S Zhu, X Zhu, X Zhu, Y Zhu, Z Zhu, J Zhuang, B Zou, J Zou, J Zuo