The study of ρ-ω mixing has mainly focused on vector meson decays with isospin I = 1, namely theρ（ω）→π＋π- process. In this paper, we present a study of ρ-ω mixing in ρ（ω）→π＋π-π0（I = 0） using a f...The study of ρ-ω mixing has mainly focused on vector meson decays with isospin I = 1, namely theρ（ω）→π＋π- process. In this paper, we present a study of ρ-ω mixing in ρ（ω）→π＋π-π0（I = 0） using a flavor parameterization model for the J/ψ→VP process. By fitting a theoretical framework to PDG data, we obtain the SU（3）-breaking effect parameters sV = 0.03±0.12, sP = 0.17±0.17 and the ρ-ω mixing polarization operatorΠρω =（0.006±0.011） GeV2. New values are found for the branching ratios when the mixing effect is incorporated：Br（J/ψ→ωπ0）=（3.64±0.37）×10-4, Br（J/ψ→ωη）=（1.48±0.17）×10-3, Br（J/ψ→ωη）=（1.55±0.56）×10-4, these are different from the corresponding PDG2012 values by 19%, 15% and 15%, respectively.展开更多
基金Supported by Ministry of Science and Technology of China(973 Project No.2009CB825200)
文摘The study of ρ-ω mixing has mainly focused on vector meson decays with isospin I = 1, namely theρ（ω）→π＋π- process. In this paper, we present a study of ρ-ω mixing in ρ（ω）→π＋π-π0（I = 0） using a flavor parameterization model for the J/ψ→VP process. By fitting a theoretical framework to PDG data, we obtain the SU（3）-breaking effect parameters sV = 0.03±0.12, sP = 0.17±0.17 and the ρ-ω mixing polarization operatorΠρω =（0.006±0.011） GeV2. New values are found for the branching ratios when the mixing effect is incorporated：Br（J/ψ→ωπ0）=（3.64±0.37）×10-4, Br（J/ψ→ωη）=（1.48±0.17）×10-3, Br（J/ψ→ωη）=（1.55±0.56）×10-4, these are different from the corresponding PDG2012 values by 19%, 15% and 15%, respectively.
