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Vector meson rescattering effect in understanding the threshold enhancement observed in J/ψ→γp
作者姓名:刘晓海  张远江  赵强
作者单位:Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China
基金项目:Supported by National Natural Science Foundation of China (10675131 10491306); Chinese Academy of Sciences (KJCX3-SYW-N2); Ministry of Science and Technology of China (2009CB825200)
摘    要:We propose one possible mechanism,i.e.,the vector meson (VV) rescattering effects,to interpret the near threshold narrow enhancement observed in J/ψ → γpp.The estimate indicates that these effects can give sizeable contributions to this channel,and a destructive interference between different rescattering amplitudes is required to reproduce the line shape of the data.

关 键 词:矢量介子  增强效应  门槛  大肠杆菌  数据线  破坏性  估计
收稿时间:2010-01-27
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