Work

Decays of Υ ( 10860 ) and Υ ( 10753 ) into ω χ b J

Year: 2025

Type: article

Abstract: In this paper, we model Υ ( 10753 ) as a 4 S − 3 D bottomonium mixture and Υ ( 10860 ) as a 5 S − 4 D mixture, and predict the properties of a new bottomonium state, Υ ( 10950 ) , as the mixing partner of Υ ( 10860 ) . The mixing angles are derived from dielectron decay widths and mass shifts of these bottomonia. We consider open-bottom meson loops in the decays of the D -wave bottomonium components, based on a nonrelativistic effective field theory power counting. We show that the S − D mixing scheme is consistent with the experimental data of the decays of Υ ( 10860 ) into ω χ b J ( J = 0 , 1 , 2 ) and Υ ( 10753 ) into ω χ b J ( J = 1 , 2 ). Predictions for the dielectron widths and partial decay widths into χ b J ω for Υ ( 10753 ) and Υ ( 10950 ) are presented.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2025.139960

Authors: Zheng-Li Luo, Yi-Lin Song, Feng-Kun Guo

Institutions: Chinese Academy of Sciences, Peking University, Institute of Theoretical Physics, University of Chinese Academy of Sciences, Institute of Modern Physics

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, Chinese Academy of Sciences, Ministry of Science and Technology of the People's Republic of China, National Key Research and Development Program of China

Awards: G2188395147, G2330016983, G328816031, G8351509261, G8644667100