η′→γπ+π− 衰变动力学的精密研究
高能物理 - 实验
2018-06-21 v3
摘要
利用在 BEPCII 上的 BESIII 探测器记录的低本底数据样本，包含 9.7×10^5 个 J/ψ→γη′、η′→γπ+π− 事例，其数量比先前实验大两个数量级，采用模型依赖和模型无关两种方法研究了 η′→γπ+π− 的衰变动力学。在两种方法中均首次在 η′→γπ+π− 衰变中观测到 ω 以及 ρ(770)-ω 干涉的贡献。此外，在模型依赖方法中需要来自盒反常或 ρ(1450) 共振的贡献，而在模型无关方法中确定了衰变振幅的进程特定部分。
引用
@article{arxiv.1712.01525,
title = {Precision Study of $\eta^\prime\rightarrow\gamma\pi^+\pi^-$ Decay Dynamics},
author = {BESIII Collaboration and M. Ablikim and M. N. Achasov and S. Ahmed and X. C. Ai and O. Albayrak and M. Albrecht and D. J. Ambrose and A. Amoroso and F. F. An and Q. An and J. Z. Bai and R. Baldini Ferroli and Y. Ban and D. W. Bennett and J. V. Bennett and N. Berger and M. Bertani and D. Bettoni and J. M. Bian and F. Bianchi and E. Boger and I. Boyko and R. A. Briere and H. Cai and X. Cai and O. Cakir and A. Calcaterra and G. F. Cao and S. A. Cetin and J. Chai and J. F. Chang and G. Chelkov and G. Chen and H. S. Chen and J. C. Chen and M. L. Chen and S. Chen and S. J. Chen and X. Chen and X. R. Chen and Y. B. Chen and H. P. Cheng and X. K. Chu and G. Cibinetto and H. L. Dai and J. P. Dai and A. Dbeyssi and D. Dedovich and Z. Y. Deng and A. Denig and I. Denysenko and M. Destefanis and F. De Mori and Y. Ding and C. Dong and J. Dong and L. Y. Dong and M. Y. Dong and Z. L. Dou and S. X. Du and P. F. Duan and J. Z. Fan and J. Fang and S. S. Fang and X. Fang and Y. Fang and R. 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journal= {arXiv preprint arXiv:1712.01525},
year = {2018}
}
备注
7 pages, 4 figures, 1 tables