Regular Article – Theoretical Physics
Branching fractions of and their implications
School of Nuclear Science and Technology, Lanzhou University, 730000, Lanzhou, China
2 Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, 210023, Nanjing, Jiangsu, China
3 Department of Physics, Hunan Normal University, 410081, Changsha, China
Accepted: 8 January 2021
Published online: 22 January 2021
The exotic states with the quark flavor of are recently observed in the mass spectrum of in by the LHCb collaboration. To explore the nature of , except for analyzing their masses and decay widths as usually did in literatures, the study of their production mechanism in B-meson weak decays would provide another important information. The amplitude of is non-factorizable. We consider the final-state-interaction effects and calculate them via the rescattering mechanism. The measured branching fractions of are revealed. It is manifested by and that the rescattering mechanism can result in the relatively large branching fractions. The similar processes of are also analyzed. The isospins of can be investigated by decays.
© The Author(s) 2021
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