中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(9) ：84-90.DOI:10.1007/s11433-023-2408-1

Precise determination of the pole position of the exotic Zc(3900)

Yun-Hua Chen Meng-Lin Du Feng-Kun Guo
中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(9) ：84-90.DOI:10.1007/s11433-023-2408-1
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  • 万方数据

Precise determination of the pole position of the exotic Zc(3900)

Yun-Hua Chen 1Meng-Lin Du 1Feng-Kun Guo2
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作者信息

  • 1. School of Mathematics and Physics,University of Science and Technology Beijing,Beijing 100083,China;School of Physics,University of Electronic Science and Technology of China,Chengdu 611731,China
  • 2. CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Peng Huanwu Collaborative Center for Research and Education,Beihang University,Beijing 100191,China
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Abstract

We perform a unified description of the experimental data of the π+π-and J/ψπ±invariant mass spectra for e+e-→ J/ψπ+π-and the D0D*-mass spectrum for e+e-→D0D*-+at e+e-center-of-mass energies 4.23 and 4.26 GeV.The analysis takes into account open-charm meson loops that contain triangle singularities,the J/ψπ-D(D)* coupled-channel interaction respecting unitarity,and the strong ππ-K(K)final state interaction using dispersion relations.The analysis leads to a precise determination of the Zc(3900)pole with the pole mass and width(3880.7±1.7stat±22.4syst)MeV and(35.9±1.4stat±15.3syst)MeV,respectively,and hints at that the DD*molecular and non-molecular components are of similar importance in the Zc(3900)formation.

Key words

exotic hadrons/dispersion relations/final state interaction/triangle singularity

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基金项目

National Natural Science Foundation of China(11975028)

National Natural Science Foundation of China(11974043)

National Natural Science Foundation of China(12361141819)

National Natural Science Foundation of China(12125507)

National Natural Science Foundation of China(11835015)

National Natural Science Foundation of China(12047503)

National Natural Science Foundation of China(12070131001)

Chinese Academy of sciences(XDB34030000)

Chinese Academy of sciences(YSBR-101)

NSFC()

Deutsche Forschungsgemeinschaft(DFG)through the funds provided to the Sino-German Collaborative Research Center TRR110(DFG)(196253076)

出版年

2024
中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
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