Branching fraction of the isospin violating process φ→ωπ^0  

作　　者：苑长征 莫晓虎 王平 

机构地区：[1]Institute of High Energy Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics C》2011年第6期543-544,共2页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10491303, 10775412, 10825524, 10935008);Instrument Developing Project of Chinese Academy of Sciences (YZ200713);Major State Basic Research Development Program (2009CB825206);Knowledge Innovation Project of Chinese Academy of Sciences (KJCX2-YW-N29)

摘　　要：We have examined the parametrization of the e^＋e^- → ωπ0 cross section in the vicinity of the φ resonance and the extraction of the branching fraction of the isospin violating process φ → ωπ0 from experimental data. We found that there are two possible solutions of the branching fraction： one is 4 × 10-5, and the other is 7×10^-3. The latter is two orders of magnitude higher than the former, which is the commonly accepted one.We have examined the parametrization of the e^＋e^- → ωπ0 cross section in the vicinity of the φ resonance and the extraction of the branching fraction of the isospin violating process φ → ωπ0 from experimental data. We found that there are two possible solutions of the branching fraction： one is 4 × 10-5, and the other is 7×10^-3. The latter is two orders of magnitude higher than the former, which is the commonly accepted one.

关 键 词：multiple solution φ resonance branching ratio 

分 类 号：P142[天文地球—天体物理]