Amplitude analysis and branching fraction measurement of Ds+ → K K + π + π + π

The BESIII Collaboration

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Using e+e annihilation data corresponding to a total integrated luminosity of 6.32 fb−1 collected at the center-of-mass energies between 4.178 and 4.226 GeV with the BESIII detector, we perform an amplitude analysis of the decay Ds+ → KK+π+π+π and determine the relative fractions and phases of different intermediate processes. Absolute branching fraction of Ds+→ KK+π+π+π decay is measured to be (6.60 ± 0.47stat.± 0.38syst.) × 10−3. The dominant intermediate process is Ds+→ a1(1260)+ϕ, ϕ → KK+, a1(1260)+→ ρπ+, ρ → π+π, with a branching fraction of (5.15 ± 0.41stat.± 0.32syst.) × 10−3. [Figure not available: see fulltext.]

Original languageEnglish (US)
Article number51
JournalJournal of High Energy Physics
Issue number7
StatePublished - Jul 2022

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Publisher Copyright:
© 2022, The Author(s).


  • Branching fraction
  • Charm Physics
  • Particle and Resonance Production
  • e-e Experiments


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