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

BESIII Collaboration, N. Kalantar-Nayestanaki, R. Kappert, M. Kavatsyuk, Johan Messchendorp, V. Rodin

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Abstract

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
Article number181
JournalJournal of High Energy Physics
Volume2022
Issue number6
DOIs
Publication statusPublished - Jun-2022

Keywords

  • Branching fraction
  • Charm physics
  • e-e Experiments

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