Further insights into the ＂ρπ puzzle

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...

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Published inChinese physics C Vol. 34; no. 2; pp. 299 - 304
Main Author 赵强 李刚 张肇西
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.02.2010
Subjects
amp
MD光盘
子循环
矢量介子
系统调查
联轴器
Online AccessGet full text
ISSN1674-1137
0254-3052
2058-6132
DOI10.1088/1674-1137/34/2/027

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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＂.
AbstractList 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＂.
Author 赵强 李刚 张肇西
AuthorAffiliation 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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vector-meson dominance, decays of J/ψ, upsilon, other quarkonia, hadronic decays of mesons
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MD光盘
子循环
矢量介子
系统调查
联轴器
Title Further insights into the ＂ρπ puzzle
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