Revisiting hidden-charm pentaquarks from QCD sum rules Supported by National Natural Science Foundation of China (11722540, 11261130311), Fundamental Research Funds for the Central Universities, and Foundation for Young Talents in College of Anhui Province (gxyq2018103)

Xiang, Jia-Bing ( School of Physics and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China) ; Chen, Hua-Xing ( School of Physics and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China) ; Chen, Wei ( School of Physics, Sun Yat-Sen University, Guangzhou 510275, China) ; Li, Xiao-Bo ( School of Physics and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China) ; Yao, Xing-Qun ( School of Physics and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China) ; Zhu, Shi-Lin ( School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China) ( Collaborative Innovation Center of Quantum Matter, Beijing 100871, China) ( Center of High Energy Physics, Peking University, Beijing 100871, China)

12 March 2019

Abstract: We revisit hidden-charm pentaquark states and using the method of QCD sum rules by requiring the pole contribution to be greater than or equal to 30% in order to better that the one-pole parametrization is valid. We find two mixing currents, and our results suggest that and can be identified as hidden-charm pentaquark states having and , respectively. However, there still exist other possible spin-parity assignments, such as and , which must be clarified in further theoretical and experimental studies.


Published in: Chinese Phys. C 43 (2019) 034104
Published by: Institute of Physics Publishing/Chinese Academy of Sciences
DOI: 10.1088/1674-1137/43/3/034104
arXiv: 1711.01545
License: CC-BY-3.0



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