Study of the decays Ds+ → KS0 K+ and KL0 K+


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Ablikim M., Achasov M., Adlarson P., Ahmed S., Albrecht M., Alekseev M., ...More

Physical Review D, vol.99, no.11, 2019 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 99 Issue: 11
  • Publication Date: 2019
  • Doi Number: 10.1103/physrevd.99.112005
  • Journal Name: Physical Review D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Ankara University Affiliated: Yes

Abstract

© 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the «https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.Using an e+e- annihilation data sample corresponding to an integrated luminosity of 3.19 fb-1 and collected at a center-of-mass energy s=4.178 GeV with the BESIII detector, we measure the absolute branching fractions B(Ds+→KS0K+)=(1.425±0.038stat.±0.031syst.)% and B(Ds+→KL0K+)=(1.485±0.039stat.±0.046syst.)%. The branching fraction of Ds+→KS0K+ is compatible with the world average and that of Ds+→KL0K+ is measured for the first time. We present the first measurement of the KS0-KL0 asymmetry in the decays Ds+→KS,L0K+, and R(Ds+→KS,L0K+)=B(Ds+→KS0K+)-B(Ds+→KL0K+)B(Ds+→KS0K+)+B(Ds+→KL0K+)=(-2.1±1.9stat.±1.6syst.)%. In addition, we measure the direct CP asymmetries ACP(Ds±→KS0K±)=(0.6±2.8stat.±0.6syst.)% and ACP(Ds±→KL0K±)=(-1.1±2.6stat.±0.6syst.)%.