| Isospin violating mechanisms in quarkonium hadronic decays |
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| 作者姓名： | 李刚 张远江 赵强 邹冰松 |
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| 作者单位： | Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China; Department of Physics, Qufu Normal University, Qufu 273165, China |
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| 基金项目： | Supported by National Natural Science Foundation of China （10675131, 10491306, 10435080, 10521003）, Chinese Academy of Sciences （KJCX3-SYW-N2） and the Ministry of Science and Technology of China （2009CB825200） |
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| 摘 要： | We analyze the φ meson production in e^＋e^- →ωπ^0 as a probe for studying the isospin violation mechanisms. By clarifying the dynamic sources causing the isospin violation, we succeed in quantifying those mechanisms with the help of the recent KLOE data. Hence, the φ→ωπ^0 branching ratio is extracted. We find that apart from the electromagnetic （EM） transitions, the strong transition via intermediate kaon loops plays an important role in understanding the cross section and its lineshape.
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| 关 键 词： | 同位旋 强子衰变 机制 偶素 夸克 电子生产 φ介子 动力源 |
| 收稿时间： | 2010-1-26 |
Isospin violating mechanisms in quarkonium hadronic decays |
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| Affiliation: | [1]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China [2]Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China [3]Department of Physics, Qufu Normal University, Qufu 273165, China |
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| Abstract: | Isospin violation, Intermediate meson loop |
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| Keywords: | Isospin violation Intermediate meson loop |
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