Further insights into the "ρπ puzzle" |
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引用本文: | 赵强,李刚,张肇西.Further insights into the "ρπ puzzle"[J].中国物理 C,2010,34(2):299-304. |
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作者姓名: | 赵强 李刚 张肇西 |
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作者单位: | Institute of High Energy Physics, CAS, Beijing 100049, China; Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom; Theoretical Physics Center for Science Facilities, CAS, Beijing 100049, China; Institute of Theoretical Physics, CAS, Beijing 100080, China |
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基金项目: | Supported by National Natural Science Foundation of China (10675131,10491306,10547001,90403031);;Chinese Academy of Sciences (KJCX3-SYW-N2);;UK EPSRC(GR/S99433/01) |
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摘 要: | Based on a systematic investigation of J/ψ(ψ')→VP, where V and P stand for light vector and pseudoscalar mesons, we identify the role played by the electromagnetic (EM) transitions and intermediate meson loop transitions, which are essential ingredients for understanding the J/ψ and ψ' couplings to VP. We show that on the one hand, the EM transitions have relatively larger interferences in ψ'→ρπ and K^*^-K +c.c. as explicitly shown by vector meson dominance (VMD). On the other hand, the strong decay of ψ' receives relatively larger destructive interferences from the intermediate meson loop transitions. By identifying these mechanisms in an overall study of J/ψ(ψ') → VP, we provide a coherent understanding of the so-called "ρπ puzzle".
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关 键 词: | π 矢量介子 amp 系统调查 MD光盘 子循环 总裁 联轴器 |
收稿时间: | 2009-8-27 |
修稿时间: | 2009-10-9 |
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