Isospin violating mechanisms in quarkonium hadronic decays  

作　　者：李刚 张远江 赵强 邹冰松 

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences [2]Department of Physics,Qufu Normal University [3]Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences

出　　处：《Chinese Physics C》2010年第6期842-847,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10675131,10491306,10435080,10521003);Chinese Academy of Sciences (KJCX3-SYW-N2);the Ministry of Science and Technology of China (2009CB825200)

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.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.

关 键 词：Isospin violation Intermediate meson loop 

分 类 号：O572.33[理学—粒子物理与原子核物理]