Year: 2024
Type: article
Abstract: The spin-singlet state η c 2 ( D 2 1 ) has not been discovered in experiment and it is the only missing low-excited D -wave charmonium, so in this paper, we like to study its properties. Using the Bethe-Salpeter equation method, we obtain its mass as 3828.2 MeV and its electromagnetic decay widths as Γ [ η c 2 ( 1 D ) → h c ( 1 P ) γ ] = 284 keV , Γ [ η c 2 ( 1 D ) → J / ψ γ ] = 1.04 keV , Γ [ η c 2 ( 1 D ) → ψ ( 2 S ) γ ] = 3.08 eV , and Γ [ η c 2 ( 1 D ) → ψ ( 3770 ) γ ] = 0.143 keV . Considering the strong decay widths are estimated to be Γ ( η c 2 ( 1 D ) → η c π π ) = 144 keV and Γ ( η c 2 ( 1 D ) → g g ) = 46.1 keV , we obtain the total decay width of 475 keV for η c 2 ( 1 D ) , and point out that the full width is very sensitive to the mass
Authors: Xin-Yao Du, Su-Yan Pei, Wei Li, Man Jia, Qiang Li, Tianhong Wang, Bo Wang, Guo-Li Wang
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4405494183