Amplitude analysis and branching-fraction measurement of Ds+→KS0π+π0

The BESIII Collaboration

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By using 6.32 fb−1 of data collected with the BESIII detector at center-of-mass energies between 4.178 and 4.226 GeV, we perform an amplitude analysis of the decay Ds+→KS0π+π0 and determine the relative fractions and phase differences of different intermediate processes, which include KS0ρ(770)+, KS0ρ(1450)+, K*(892)0π+, K*(892)+π0, and K*(1410)0π+. With the detection efficiency based on the amplitude analysis results, the absolute branching fraction is measured to be ℬ(Ds+→KS0π+π0)=(5.43±0.30stat±0.15syst)×10−3. [Figure not available: see fulltext.]

Original languageEnglish (US)
Article number181
JournalJournal of High Energy Physics
Issue number6
StatePublished - Jun 1 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021, The Author(s).


  • Branching fraction
  • Charm physics
  • e-e Experiments


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