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

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

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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.

exotic hadronsdispersion relationsfinal state interactiontriangle singularity

Yun-Hua Chen、Meng-Lin Du、Feng-Kun Guo

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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

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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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChinese Academy of sciencesChinese Academy of sciencesNSFCDeutsche Forschungsgemeinschaft(DFG)through the funds provided to the Sino-German Collaborative Research Center TRR110(DFG)

11975028119740431236114181912125507118350151204750312070131001XDB34030000YSBR-101196253076

2024

10.1007/s11433-023-2408-1

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
年,卷(期)：2024.67(9)