Strong and Electromagnetic J/psi and psi(2S) Decays into Pion and Kaon Pairs

Abstract

A combined analysis of the electromagnetic pion and kaon form factors in the neighborhood of J/psi and psi(2S) and of the strong decay amplitude of these resonances into kaons is presented. In the presence of a large relative phase between strong and electromagnetic resonance amplitudes the branching ratio, as measured in electron-positron annihilation, receives an additional contribution from the interference between resonance and continuum amplitude neglected in earlier papers. Our study is model independent and does not rely on the SU(3) symmetry assumptions used in earlier papers. We note that the large relative phase between strong and electromagnetic amplitudes observed in earlier analyses is model dependent and relies critically on the specific assumptions on SU(3) symmetry and breaking.

References in corpus (17)

• Radiative return at NLO and the measurement of the hadronic cross-section in electron-positron annihilation
• Pion Form Factor in QCD at Intermediate Momentum Transfers
• Precision Measurements of the Timelike Electromagnetic Form Factors of Pion, Kaon, and Proton
• Four Pion Final States with Tagged Photons at Electron Positron Colliders
• Modeling the Pion and Kaon Form Factors in the Timelike Region
• Soft contribution to the pion form factor from light-cone QCD sum rules
• Exploring Light-Cone Sum Rules for Pion and Kaon Form Factors
• Nucleon form factors, B-meson factories and the radiative return
• On Large Final-State Phases in Heavy Meson Decays
• A large final-state interaction in the 0-0- decays of J/psi
• Electron-positron annihilation into three pions and the radiative return
• Pion form factor and QCD sum rules: case of axial current
• Does $J/\psi \to {\pi }^{+}{\pi }^{-}$ fix the Electromagnetic Form Factor $F_{\pi }(t)$ at $t=M_{J/\psi }^2$?
• Measurement of Interference between Electromagnetic and Strong Amplitudes in psi(2S) Decays to Two Pseudoscalar Mesons
• Tests of flavor symmetry in J/psi decays
• Timelike Form Factor of the Kaon for |Q^2|=M^2(J/psi)
• Perspectives for the radiative return at meson factories

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