期刊
CHINESE PHYSICS C
卷 46, 期 12, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1674-1137/ac89d1
关键词
B meson decay; perturbative QCD; three-body radiative decay
In this study, we investigate quasi-two-body B-(s) K*gamma K pi gamma decays using the perturbative QCD approach. Two-meson distribution amplitudes are introduced to describe the final state interactions of the K pi pair. Our results are in agreement with experimental data, suggesting that analyzing these quasi-two-body B decays in the three-body framework is more appropriate.
In this study, we investigate quasi-two-body B-(s) (sic) K*gamma (sic) K pi gamma decays in the perturbative QCD approach. Two-meson distribution amplitudes are introduced to describe the final state interactions of the K pi pair, which involve time-like form factors and Gegenbauer polynomials. We calculate the CP averaged branching ratiosof the B-(s) (sic) K*gamma (sic) K pi gamma decays. Our results are in agreement with newly updated data measured by Belle II. This suggests that it is more appropriate to analyze these quasi-two-body B decays in the three-body framework than the two-body framework. We also predict direct CP asymmetries for the considered decay modes and find that A(CP)(B-u,B-d (sic) K*gamma (sic) K pi gamma) is small and less than % in magnitude, whereas A(CP)(B-s (sic) K*gamma (sic) K pi gamma) is larger and can reach a few percent. Our predictions can be tested in future B meson experiments.
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