| Low-energy D^＊＋D1^0 scattering and the nature of resonance-like structure Z^＋（4430） |
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| 作者姓名： | 宫明 陈莹 蒙国站 何颂 李刚 刘川 刘玉斌 马建平 孟翔飞 牛志元 沈言 张剑波 张远江 (CLQCD collaboration) |
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| 作者单位： | School of Physics, Peking University, Beijing 100871, China; Institute of High Energy Physics, Academia Sinica, P. O. Box 918, Beijing 100049 China; Department of Physics, Nankai University, Tianjin 300071, China; Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China; Department of Physics, Zhejiang University, Hangzhou 310027, China |
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| 基金项目： | Supported by National Natural Science Foundation of China （10835002 10675005 10721063） |
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| 摘 要： | Low-energy scattering of D ^＊＋ and D1^0 meson is studied using quenched lattice QCD with improved lattice actions on anisotropic lattices.The threshold scattering parameters,namely the scattering length a 0 and the effective range r 0,for the s-wave scattering in J P = 0 - channel are extracted： a 0 = 2.52（47） fm and r 0 = 0.7（1） fm.It is argued that,albeit the interaction between the two charmed mesons being attractive,it is unlikely that they can form a shallow bound state in this channel.Our calculation provides some useful information on the nature of the newly discovered resonance-like structure Z ＋ （4430） by the Belle Collaboration.
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| 关 键 词： | 低能散射 共振式 结构 性质 低能量 格点QCD 各向异性 散射参数 |
| 收稿时间： | 2010-03-04 |
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