Investigating S-wave bound states composed of two pseudoscalar mesons

In this study, we systematically investigated two-pseudoscalar meson systems with the Bethe-Salpeter equation in the ladder and instantaneous approximations. By solving the Bethe-Salpeter equation numerically with the kernel containing the one-particle exchange diagrams, we found that the , , , , ,...

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Bibliographic Details
Published in:Chinese physics C 2023-01, Vol.47 (1), p.13102
Main Authors: Li, Zi-Long, Tan, Xing-Yue, Zhang, Zhu-Feng, Wang, Zhen-Yang, Guo, Xin-Heng
Format: Article
Language:English
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Summary:In this study, we systematically investigated two-pseudoscalar meson systems with the Bethe-Salpeter equation in the ladder and instantaneous approximations. By solving the Bethe-Salpeter equation numerically with the kernel containing the one-particle exchange diagrams, we found that the , , , , , , , , and systems with can exist as bound states. We also studied the contributions from heavy meson ( and ) exchanges and found that the contributions from heavy meson exchanges cannot be ignored.
ISSN:1674-1137
2058-6132
DOI:10.1088/1674-1137/ac93ed