| Rare decays ^-Bs,d^0→e^＋e^- in a top quark two-Higgs-doublet model |
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| 引用本文： | 吕林霞,张国芳,宋金璠,鲁公儒.Rare decays ^-Bs,d^0→e^＋e^- in a top quark two-Higgs-doublet model[J].中国物理 C,2010,34(2):165-170. |
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| 作者姓名： | 吕林霞 张国芳 宋金璠 鲁公儒 |
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| 作者单位： | Department of Physics, Nanyang Normal University, Nanyang 473061, China ; Department of Physics, He'nan Normal University, Xinxiang 453007, China |
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| 基金项目： | Supported by National Natural Science Foundation of CHina （10947020）, Fund of He＇nan Educational Committee for Youth Backbone Scholars in Colleges and Universities, and Special Study Foundation of Nanyang Normal University （nynu200750） |
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| 摘 要： | In the framework of T2HDM, we calculated the new physics contributions involving neutral Higgs bosons to the branching ratios of ^-Bs,d^0→e^＋e^-（e= e,μ） decays. Comparing the theoretical predictions with the experimental upper-limits, we found that （a） The data of Br（^-Bs,d^0→e^＋e^-） give the upper bound on tanβ： tanβ≤22, while Br（^-Bs^0→e^＋e^-） give tanβ≤12 for fixed δ = 0^0, mH＋ = 350 CeV, mH^0 = 160 GeV, mh^0 = 115 GeV and mA^0 = 120 GeV; （b） A light neutral Higgs boson mass mho （mA^0） less than 50 GeV （120 GeV） is excluded by the data of branching ratios for ^-Bs,d^0→e^＋e^-（e = μ） decays with tanβ= 10; （c） The bounds on mh^0 and tanβ, or mA^0 and tanβ are strongly correlated： a smaller （larger） tanβ means a lighter （heavier） neutral Higgs boson.
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| 关 键 词： | 稀有衰变 位置 旅馆 顶夸克 希格斯玻色子 双峰 tan 比较实验 |
| 收稿时间： | 2009-3-19 |
| 修稿时间： | 2009-5-13 |
Rare decays ^-Bs,d^0→e^＋e^- in a top quark two-Higgs-doublet model |
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| LU Lin-Xia,ZHANG Guo-Fang,SONG Jin-Fan,LU Gong-Ru.Rare decays ^-Bs,d^0→e^＋e^- in a top quark two-Higgs-doublet model[J].High Energy Physics and Nuclear Physics,2010,34(2):165-170. |
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| Authors: | LU Lin-Xia ZHANG Guo-Fang SONG Jin-Fan LU Gong-Ru |
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| Institution: | 1. Department of Physics, Nanyang Normal University, Nanyang 473061, China ;2. Department of Physics, He＇nan Normal University, Xinxiang 453007, China) |
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| Abstract: | rare decay, branching ratio, two-Higgs-doublet model, new physics |
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| Keywords: | rare decay branching ratio two-Higgs-doublet model new physics |
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