| ψ(3770)→J/ψπ+π—强跃迁过程的首次观测 |
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| 引用本文： | BES合作组.ψ(3770)→J/ψπ+π—强跃迁过程的首次观测[J].中国物理 C,2004,28(4):325-331. |
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| 作者姓名： | BES合作组 |
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| 基金项目： | 国家自然科学基金 ( 199914 80,10 175 0 60 )，国家杰出青年科学基金 ( 10 2 2 5 5 2 4,10 2 2 5 5 2 5 )，中国科学院九五重大项目 (KJ95T -0 3 )，中国科学院百人计划基金 (U -11,U -2 4,U -2 5 )，中国科学院知识创新基金 (U -60 2 ,U -3 4)资助~~ |
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| 摘 要： | 观测到ψ(3770)衰变到J/ψπ+π—非DD末态迹象.利用工作在北京正负电子对撞机上的北京谱仪探测器在质心系能量3.773GeV附近获取的8.0±0.5pb-1数据样本,共观测到6.8±3.0个ψ(3770)→J/ψπ+π—事例.由此得到的分支比为BF(ψ(3770)→J/ψπ+π—)=(0.59±0.26±0.16)%,其对应的分宽度为Γ(ψ(3770)→J/ψπ+π—)=(139±61±41)keV.
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| 关 键 词： | ψ(3770) 强跃迁 非DD衰变 分支比 BES BEPC |
| 收稿时间： | 2004-2-16 |
First Evidence of ψ(3770) Hadronic Transition to J/ψπ+π- |
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| Abstract.First Evidence of ψ(3770) Hadronic Transition to J/ψπ+π-[J].High Energy Physics and Nuclear Physics,2004,28(4):325-331. |
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| Authors: | Abstract |
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| Institution: | BES Collaboration BAI Jing-ZhiBAN Yong 5BIAN Jian-GuoCAI XiaoCHANG Jin-FanCHEN Hai-XuanCHEN He-ShengCHEN Hong-Fang 1CHEN Jiang-ChuanCHEN JinCHEN Jun 11CHEN Ma-LiCHEN Yuan-BoCHI Shao-Peng 7CHU Yuan-PingCUI Xiang-ZongDAI Hong-LiangDAI You-Shan 3DENG Zi-YanDONG Liao-YuanDU Shu-XianDU Zhi-ZhenFANG JianFANG Shuang-Shi 7FU Cheng-DongFU Hong-YuFU Li-Ping 11GAO Cui-ShanGAO Mei-LiGAO Yuan-Ning 14GONG Ming-YuGONG Wen-XuanGU Shu-DiGUO Ya-NanGUO Yi-QingHAN Shi-Wen HE JuHE Kang-LinHE Mao 2HE XiangHENG Yue-KunHU Hai-MingHU TaoHUANG Guang-Shun HUANG Liang 11HUANG Xiu-PingJIA Qing-Ying 5JI Xiao-BinJIANG Chun-HuaJIANG Xiao-ShanJIN Da-Peng JIN ShanJIN YanLAI Yuan-FenLI FeiLI GangLI Hui-HongLI Jia-CaiLI JinLI Qiu-JuLI Ren-YingLI Ru-BoLI Shu-MinLI WeiLI Wei-GuoLI Xiao-Ling 12LI Xue-Qian 8LI Xue-Song 14LIANG Yong-Fei 13LIAO Hong-Bo 6LIU Chun-XiuLIU Fang 1LIU Feng 6LIU Huai-MinLIU Jian-BeiLIU Jue-Ping 10LIU Rong-GuangLIU YanLIU Zhen-AnLIU Zhong-XiuLU Gong-Ru 9LU FengLU Jun-GuangLUO Cheng-Lin 16LUO Xiao-LanMA Feng-Cai 12MA Ji-MaoMA Lian-Liang 2MA Xiao-YanMAO Ze-PuMENG Xiang-ChengMO Xiao-HuNIE JingNIE Zhen-DongPENG Hai-Ping 1QI Na-DingQIAN Cheng-De 4QIN Hu 16QIU Jin-FaREN Zhen-YuRONG Gang 1 |
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| Abstract: | |
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| Keywords: | hadronic transition non-D*$D decay branching fraction BES BEPC |
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