Studying the $${\bar{D}}_1K$$ D ¯ 1 K molecule in the Bethe–Salpeter equation approach
Autor: | Jing-Juan Qi, Zhen-Yang Wang, Zhu-Feng Zhang, Xin-Heng Guo |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: | |
Zdroj: | European Physical Journal C: Particles and Fields, Vol 81, Iss 7, Pp 1-7 (2021) |
Druh dokumentu: | article |
ISSN: | 1434-6044 1434-6052 |
DOI: | 10.1140/epjc/s10052-021-09422-z |
Popis: | Abstract We interpret the $$X_1(2900)$$ X 1 ( 2900 ) as an S-wave $${\bar{D}}_1K$$ D ¯ 1 K molecular state in the Bethe–Salpeter equation approach with the ladder and instantaneous approximations for the kernel. By solving the Bethe–Salpeter equation numerically with the kernel containing one-particle-exchange diagrams and introducing three different form factors (monopole, dipole, and exponential form factors) in the verties, we find the bound state exists. We also study the decay width of the decay $$X_1(2900)$$ X 1 ( 2900 ) to $$D^-K^+$$ D - K + . |
Databáze: | Directory of Open Access Journals |
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