| Further insights into the “ρπ puzzle” |
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| 作者单位： | ZHAO Qiang(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, Bei);LI Gang(Institute of High Energy Physics, CAS, Beijing 100049, China);CHANG Chao-Hsi(Institute of Theoretical Physics, CAS, Beijing 100080, China) |
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| 基金项目： | Supported by National Natural Science Foundation of China，中国科学院资助项目，U.K. EPSRC |
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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： | decays of J/ψ |
Further insights into the puzzle" |
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| ZHAO Qiang,LI Gang,CHANG Chao-Hsi. Further insights into the puzzle"[J]. Chinese Physics C, 2010, 34(2) |
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| Authors: | ZHAO Qiang LI Gang CHANG Chao-Hsi |
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| Abstract: | 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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| Keywords: | vector-meson dominance upsilon other quarkonia hadronic decays of mesons |
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