Study of ψ(2S) decays into γK⁺K^- and γπ⁺π^-

2007/10/11 by BES collaboration, BES Collaboration
Medicine · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.0710.2324

9 pages, 5 figures

openalex publication_date 2007/10/11 · arxiv created 2007/10/16 · arxiv updated 2012/08/27 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28

Abstract

Radiative charmonium decays from the BESII sample of 14×10⁶ ψ(2S)-events into two different final states, γK⁺K^- and γπ⁺π^-, are analyzed. Product branching fractions for ψ(2S)→γX→ γπ⁺π^-, γK⁺K^- are given, where X=f₂(1270), f₀(1500), and f₀(1710) in π⁺π^- and f₂(1270), f₂'(1525), and f₀(1700) in K⁺K^-. An angular analysis gives the ratios of the helicity projections for the f₂(1270) in ψ(2S)→γf₂(1270)→γπ⁺π^-.

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