Using e+e− annihilation data corresponding to a total integrated luminosity of 7. 33 fb−1 collected at center-of-mass energies between 4. 128 and 4. 226 GeV with the BESIII detector, we provide the first amplitude analysis and absolute branching fraction measurement of the hadronic decay Ds+→KS0KL0π+. The branching fraction of Ds+→KS0KL0π+ is determined to be (1. 86±0. 06stat±0. 03syst) %. Combining the BDs+→ϕ (→KS0KL0) π+ obtained in this Letter and the world average of BDs+→ϕ (→K+K−) π+, we measure the relative branching fraction B (ϕ→KS0KL0) /B (ϕ→K+K−) = (0. 593±0. 023stat±0. 014syst±0. 016ϕπ), where the third error is due to the uncertainty of the B (Ds+→ϕπ+, ϕ→K+K−). Our result deviates from the Particle Data Group value by more than 3σ. Furthermore, the asymmetry of the branching fractions of Ds+→KS0K* (892) + and Ds+→KL0K* (892) +, (BDs+→KS0K* (892) +−BDs+→KL0K* (892) +/BDs+→KS0K* (892) ++BDs+→KL0K* (892) +), is determined to be (−14. 5±5. 1stat±1. 8syst) %.
Ablikim et al. (Wed,) studied this question.