摘要
We have examined the parametrization of the e^＋e^- → ωπ0 cross section in the vicinity of the φ resonance and the extraction of the branching fraction of the isospin violating process φ → ωπ0 from experimental data. We found that there are two possible solutions of the branching fraction： one is 4 × 10-5, and the other is 7×10^-3. The latter is two orders of magnitude higher than the former, which is the commonly accepted one.
We have examined the parametrization of the e^＋e^- → ωπ0 cross section in the vicinity of the φ resonance and the extraction of the branching fraction of the isospin violating process φ → ωπ0 from experimental data. We found that there are two possible solutions of the branching fraction： one is 4 × 10-5, and the other is 7×10^-3. The latter is two orders of magnitude higher than the former, which is the commonly accepted one.
基金
Supported by National Natural Science Foundation of China (10491303, 10775412, 10825524, 10935008)
Instrument Developing Project of Chinese Academy of Sciences (YZ200713)
Major State Basic Research Development Program (2009CB825206)
Knowledge Innovation Project of Chinese Academy of Sciences (KJCX2-YW-N29)
