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

被引：0
|
作者：
Chen, Yun-Hua [1 ,2 ]
Du, Meng-Lin [1 ,2 ]
Guo, Feng-Kun [3 ,4 ,5 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Phys, Chengdu 611731, Peoples R China
[3] Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
[4] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
[5] Beihang Univ, Peng Huanwu Collaborat Ctr Res & Educ, Beijing 100191, Peoples R China
来源：
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2024年 / 67卷 / 09期
基金：
中国国家自然科学基金;
关键词：
exotic hadrons; dispersion relations; final state interaction; triangle singularity; PI J/PSI; STATES; PENTAQUARK; MOLECULE; PARTNER; DECAY; MASS;
D O I：
10.1007/s11433-023-2408-1
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We perform a unified description of the experimental data of the pi(+)pi(-) and J/psi pi(+/-) invariant mass spectra for e(+)e(-)-> J/psi pi(+)pi(-) and the (DD)-D-0*(-)mass spectrum for e(+)e(-)->(DD)-D-0*(-) pi(+) 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/psi pi-D (D) over bar* coupled-channel interaction respecting unitarity, and the strong pi pi-K (K) over bar final state interaction using dispersion relations. The analysis leads to a precise determination of theZc(3900) pole with the pole mass and width (3880.7 +/- 1.7(stat)+/- 22.4(syst)) MeV and (35.9 +/- 1.4(stat)+/- 15.3(syst)) MeV, respectively,and hints at that the D (D) over bar* molecular and non-molecular components are of similar importance in the Z(c)(3900) formation
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页数：7
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