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PKU HEP Seminar and Workshop (北京大学高能物理组)

On the nature of X(6900) and other possible states in the LHCb di-J/psi spectrum

by Prof. De liang Yao (Hunan University)

B105 (CHEP)



School of Physics, PKU
Partial wave analysis is performed, with effective potentials as dynamical inputs, to scrutinize the recent LHCb data on the di-J/psi invariant mass spectrum. Coupled-channel effects are implemented in the production amplitude via final state interactions. The LHCb data can be well described. A dynamical generated pole structure, which can be identified as the X(6900) state, is found. Our analysis also provides hints for the existence of three other possible states: a bound state X(6200), a broad resonant state X(6670) and a narrow resonant state X(7200). Furthermore, the J^{PC} quantum numbers of the X(6670) and X(6900) states should be 2^{++}, while the X(6200) and X(7200) states prefer 0^{++}. 报告人简介:姚德良,2013年博士毕业于北京大学。2013年至2016年,在德国Juelich研究中心从事博士后研究;2016年至2018年,西班牙国家研究委员会IFIC研究所从事博士后研究;2018年至2019年,任中国科学院近代物理研究所研究员;2019年至今,任湖南大学教授。研究方向主要是利用有效场论(手征微扰理论)与色散关系研究强子物理和核物理。近年来,致力于高精度计算介子核子散射等一些基本过程,发展不稳定粒子的手征动力学,将手征微扰理论推广到中高能区域,利用分波技术研究奇特强子态等。 Online Tencent/VOOV meeting: Meeting ID: 319 742 781 Password: 456122 (链接 https://meeting.tencent.com/s/7RHPTA85PLI5)
  • Dayong Wang
  • Hong-Hao Ma
  • Katsuya Hashino
  • Peng-Cheng Li
  • QuZhi Li
  • Shian Tang
  • Teng Xiang
  • wu shanjin
  • Xiong-Hui Cao
  • Xuelong Qin
  • Yu Chen
  • Yuanyuan Wang
  • Yunxuan Song
  • zhengxue ren
  • 侃 陈
  • 志宏 沈
  • 昕海 谢
  • 杜鑫 郑
  • 楚翘 蒋
  • 沁芳 曹
  • 皓 陈
  • 立诚 章
  • 锐 陈