Study on possible molecular states composed of ΛcD¯ ( ΛbB ) and ΣcD¯ ( ΣbB ) within the Bethe-Salpeter framework
Year: 2020
Type: article
Abstract: ${P}_{c}(4312)$ observed by the LHCb collaboration is confirmed as a pentaquark and its structure, production, and decay behaviors attract great attention from theorists and experimentalists. Since its mass is very close to sum of ${\mathrm{\ensuremath{\Sigma}}}_{c}$ and $\overline{D}$ masses, it is naturally tempted to be considered as a molecular state composed of ${\mathrm{\ensuremath{\Sigma}}}_{c}$ and $\overline{D}$. Moreover, ${P}_{c}(4312)$ is observed in the channel with $J/\ensuremath{\psi}p$ final state, requiring that isospin conservation ${P}_{c}(4312)$ is an isospin-$1/2$ eigenstate. In the literature, several groups used various models to estimate its spectrum. We systematically study the pentaquarks within the framework of the Bethe-Salpeter equation; thus ${P}_{c}(4312)$ is an excellent target because of the available data. We calculate the spectrum of ${P}_{c}(4312)$ in terms of the Bethe-Salpter equations and further study its decay modes. Some predictions on other possible pentaquark states that can be tested in future experiments are made.
Authors: Hong-Wei Ke, Mei Li, Xiao-Hai Liu, Xue-Qian Li
Institutions: Tianjin University, Nankai University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W3003955007