Establishing the first hidden-charm pentaquark with strangeness
School of Physics, Southeast University, 210094, Nanjing, China
2 School of Physics, Sun Yat-Sen University, 510275, Guangzhou, China
3 School of Physical Science and Technology, Lanzhou University, 730000, Lanzhou, China
4 Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, 730000, Lanzhou, China
5 Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, 300350, Tianjin, China
Accepted: 27 April 2021
Published online: 11 May 2021
We study the recently observed by LHCb using the method of QCD sum rules. Our results support its interpretation as the hadronic molecular state of either or . Within the hadronic molecular picture, the three LHCb experiments observing and states (Aaij et al., Phys Rev Lett 115:072001, 2015; Aaij et al., Phys Rev Lett 122:222001, 2019; Aaij et al., arXiv:2012.10380 [hep-ex], 2012) can be well understood as a whole. This strongly supports the existence of hadronic molecules, whose studies can significantly improve our understanding on the construction of the subatomic world. To verify this picture, we propose to further investigate the to examine whether it can be separated into two states, and to search for the molecular state of .
© The Author(s) 2021
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3