| D~ 和D~0介子的φΧl~ ν遍举分支比上限的测定 |
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| 引用本文： | BES合作组.D~ 和D~0介子的φΧl~ ν遍举分支比上限的测定[J].中国物理 C,2002(11). |
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| 作者姓名： | BES合作组 |
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| 作者单位： | BES CollaborationBAI Jing Zhi\ BAN Yong 5 BIAN Jian Guo CAI Xiao CHANG Jin Fan CHEN Hong Fang 1 CHEN He Sheng CHEN Jie 8 CHEN Jiang Chuan CHEN Yuan Bo CHI Shao Peng CHU Yuan Ping CUI Xiang Zong DAI You Shan 3 DONG Liao Yuan DU Zhi Zhen FU Hong? Yu FU Li Ping 11 FANG Shuang Shi GAO Cui Shan GAO Yuan Ning 14 GONG Ming Yu GU Shu Di GUO Yi Qing GUO Zi Jin 7 GUO Ya Nan HAN Shi Wen HAN Ying HE Ju HE Kang Lin HE Mao 2 HE Xiang HENG Yue Kun HONG Tao HU Gui Yun HU Hai Ming HU Tao HUANG Xiu Ping HUANG Guang Shun HUANG Yin Zhi JI Xiao Bin 2 JIANG Chun Hua JIANG Xiao Shan JIN Da Peng JIN Shan JIN Yan KE Zun Jian LAI Yuan Fen LI Gang LI Hui Hong 6 LI Jin LI Pei Qin LI Qiu Ju LI Ren Ying LI Wei LI Wei Guo LI Xue Qian 8 LIU Feng 6 LIU Huai Min LIU Jue Ping 10 LIU Rong Guang LIU Tian Rong LIU Yan LIU Zhen An LIU Zhong Xiu LU Gong Ru 9 L Feng L Jun Guang L Zhi Jian LUO Xiao Lan MA En Cheng MA Feng Cai 12 MA Ji Mao MAO Ze Pu MENG Xiang Cheng MO Xiao Hu 7 NIE Jing NIE Zhen Dong QI Na Ding QIAN Cheng? De 4 QIU Jin Fa RONG Gang SHAO Yu Ying SHEN Ben Wei SHEN Ding Li SHEN Hong SHEN Xiao Yan SHENG Hua Yi SHI Feng SHI Huan Zhang SUN Han Sheng SUN Yong Zhao TANG Xiao TONG Guo Liang WANG Jin Zhu WANG Jun WANG Lan WANG Ling Shu WANG Man WANG Meng WANG Pei Liang WANG Ping WANG Wen Feng 2 WANG Yi Fang WANG Yun Yong WANG Zheng WANG Zheng WANG Zhi Yong 7 WEI Cheng Lin WU Ning XIA Xiao Mi XIE Xiao Xi XU Guo Fa XU Ye XUE Sheng Tian YAN Mu Lin 1 YAN Wen Biao YAN Wu Guang YANG Chang You YANG Chun Min YANG Gui An YANG Hong Xun YE Ming Han 7 YE Shu Wei 1 YE Yun Xiu 1 YING Jun 5 YU Chuan Song YU Guo Wei YUAN Chang Zheng YUAN Jian Ming 3 YUAN Ye ZENG Yun |
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| 基金项目： | 国家自然科学基金(1 9991 480 ,1 982 5 1 1 6)，中国科学院“九五”重大及特别支持项目 (KJ95T -0 3 )资助~~ |
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| 摘 要： | 利用北京谱仪 (BES)在北京正负电子对撞机 (BEPC)e e- 质心系能量为4 0 3GeV处采集的积分亮度为 2 2 3pb- 1的数据 ,从D介子的 5个非轻子衰变模式中共选出 2 471± 2 1 8组DtagD X(X可能是γ或π0 或π±)和 762 9± 2 51组DtagD0 X介子样本 .在这些样本中没有找到D →e ν,K- π e ν,和D0 →K- e ν,K- μ ν的衰变事例 ,测定在 90 %置信度下分支比的上限分别为B(D →e ν) <1 3 8% ,B(D →K- π e ν) <2 0 1 % ,B(D0 →K- e ν) <0 53 % ,和B(D0 →K- μ ν) <0 53 % .
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| 关 键 词： | 北京谱仪 北京正负电子对撞机 D介子 半轻子衰变 分支比 |
| 本文献已被 CNKI 等数据库收录！ |
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