Regular Article - Theoretical Physics
Covariant light-front approach for decays into charmonium: implications on form factors and branching ratios
Institute of Theoretical Physics, School of Sciences, Henan University of Technology, 450052, Zhengzhou, Henan, China
Accepted: 1 May 2023
Published online: 7 June 2023
In this work, we investigate the form factors of decays into , and X(3872) mesons in the covariant light-front quark model (CLFQM). For the purpose of the branching ratio calculation, the form factors of transitions are also included. In order to obtain the form factors for the physical transition processes, we need to extend these form factors from the space-like region to the time-like region. The dependence for each transition form factor is also plotted. Then, using the factorization method, we calculate the branching ratios of 80 decay channels with a charmonium involved in each mode. Most of our predictions are comparable to the results given by other approaches. As to the decays with the radially excited-state S-wave charmonia involved, such as and , two sets of parameters for their light-front wave functions, corresponding to scenario I (SI) and scenario II (SII), are adopted to calculate the branching ratios. By comparing with the future experimental data, one can discriminate which parameters are more favored.
© The Author(s) 2023
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