Regular Article - Theoretical Physics
Charmless decays in PQCD approach
Department of Physics, Yantai University, 264005, Yantai, China
2 Department of Physics, Jiangsu Normal University, 221116, Xuzhou, China
3 Department of Physics, Naval Aviation University, 264001, Yantai, China
Accepted: 10 January 2022
Published online: 21 January 2022
In this work, we investigate the decays in the perturbative QCD approach, where V and S denote the vector meson and scalar meson respectively. Based on the two-quark structure, considering two different scenarios for describing the scalar mesons, we calculate the branching fractions and the direct CP asymmetries of all decays. Most branching fractions are predicted to be at to , which could be measured in the LHCb and Belle-II experiments, especially for these color-allowed decays and . It is found that the branching fractions of and are very sensitive to the scenarios, which can be used to determine whether belongs to the ground state or the first excited state, if the data were available. We also note that some decays have large direct CP asymmetries, some of which are also sensitive to the scenarios, such as the and the decays. Since the experimental measurements of decays are on the way, combined with the available data in the future, we expect the theoretical predictions will shed light on the structure of the scalar mesons.
© The Author(s) 2022
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