Observation of SCS decay D^+,0→ωπ and branching fraction measurement of D⁰→ K_S⁰K⁺K^-

2015/06/23 by P. C. Weidenkaff, Weidenkaff, Peter
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1506.07058

openalex publication_date 2015/06/23 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

Using a data set of 2.92 fb^-1 of e⁺e^- collisions at the Ψ(3770) mass accumulated with the BESIII experiment we present preliminary results from our study of the singly Cabibbo-suppressed decays D→ωπ and the decay of D⁰→ K_S⁰K⁺K^-. The decay D⁺→ωπ⁺ is observed for the first time with a significance of 5.4σ and we find evidence of 4.1σ for the decay D⁰→ωπ⁰. As a cross-check the branching fraction D→ηπ is measured and is found to be compatible with the current PDG value. The branching fraction of the decay D⁰→ K_S⁰K⁺K^- is measured in an untagged analysis with 11743±113 signal events and is found to be (4.622±0.045(stat.)±0.181(sys.))× 10^-3. This is compatible with previous measurements but with significant improved precision.

Related

• Amplitude analysis and branching fraction measurement of the decay D⁺ → K_S⁰π⁺π⁰π⁰
• Amplitude analysis and branching fraction measurement of the decay D⁰ → K⁰_Sπ⁰π⁰
• Measurement of the branching fractions of D⁺ → K⁺K^-π⁺π⁺π^-, ϕπ⁺π⁺π^-, K⁰_SK⁺π⁺π^-π⁰, K⁰_SK⁺η, and K⁰_SK⁺ω decays
• Improved measurement of the branching fractions of the inclusive decays D⁺ → K_S⁰X and D⁰ → K_S⁰X
• Amplitude analysis and branching fraction measurement of the decay D_s⁺ → K⁺π⁺π^-