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 B[Ds+→φ(→KS0KL0)π+] obtained in this Letter and the world average of B[Ds+→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)+, ({B[Ds+→KS0K∗(892)+]-B[Ds+→KL0K∗(892)+]}/{B[Ds+→KS0K∗(892)+]+B[Ds+→KL0K∗(892)+]}), is determined to be (-14.5±5.1stat±1.8syst)%.
Study of φ →K K ¯ and KS0 - KL0 Asymmetry in the Amplitude Analysis of Ds+ → KS0 KL0 π+ Decays
Garzia, I.;Melendi, F. M.;
2025
Abstract
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 B[Ds+→φ(→KS0KL0)π+] obtained in this Letter and the world average of B[Ds+→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)+, ({B[Ds+→KS0K∗(892)+]-B[Ds+→KL0K∗(892)+]}/{B[Ds+→KS0K∗(892)+]+B[Ds+→KL0K∗(892)+]}), is determined to be (-14.5±5.1stat±1.8syst)%.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.


