| A possible signature of new physics at BES-Ⅲ |
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| 引用本文： | 邹佳恒,李海波,张学尧.A possible signature of new physics at BES-Ⅲ[J].中国物理 C,2009,33(1):1-5. |
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| 作者姓名： | 邹佳恒 李海波 张学尧 |
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| 作者单位： | 1 Physics Department, Shandong University, Jinan 250100, China;2 Institute of High Energy Physics, CAS, P.O.Box 918, Beijing 100049, China |
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| 基金项目： | Supported by National Natural Science Foundation of China (10575108,10521003, 10735080);;100 Talents Program of CAS,and Knowledge Innovation Project of CAS (U-612, U-530 (IHEP)) |
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| 摘 要： | The recent observations of the purely leptonic decay Ds＋→μ＋νμ and τ＋ντ at CLEO-c and B factory may allow a possible contribution from a charged Higgs boson. One such measurement of the decay constant fD. differs from the most precise unquenched lattice QCD calculation by a level of 4 σ. Meanwhile, the measured ratio, BR（Ds＋→μ＋νμ）/BR（D＋→μ＋νμ）, is larger than the standard model prediction at a 2.0σ level. We discuss that the precise measurement of the ratio BR（Ds＋→μ＋νμ）/BR（D＋→μ＋νμ） at BES-Ⅲ will shed light on the presence of new intermediate particles by comparing the data with the theoretical predictions, especially, the predictions of high precise unquenched lattice QCD calculations.
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| 关 键 词： | 衰减常数 物理学 轻子 高能物理学 |
| 收稿时间： | 2008-6-30 |
| 修稿时间： | 2008-8-4 |
A possible signature of new physics at BES-Ⅲ |
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| ZOU Jia-Heng LI Hai-Bo ZHANG Xue-Yao.A possible signature of new physics at BES-Ⅲ[J].High Energy Physics and Nuclear Physics,2009,33(1):1-5. |
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| Authors: | ZOU Jia-Heng LI Hai-Bo ZHANG Xue-Yao |
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| Institution: | Physics Department;Shandong University;Jinan 250100;China;Institute of High Energy Physics;CAS;P.O.Box 918;Beijing 100049;China |
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| Abstract: | BES-III, decay constant, QCD, leptonic decay |
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| Keywords: | BES-III decay constant QCD leptonic decay |
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