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
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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