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arXiv 0812.0267hep-ex
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在sqrts(s)= 189-209 GeV的e+e碰撞中寻找带电希格斯玻色子

Search for Charged Higgs Bosons in e+e- Collisions at sqrts(s) = 189-209 GeV

The OPAL collaboration

摘要:

利用OPAL实验在sqrt(s)=189-209 GeV(对应于约600 pb-1的积分亮度)下收集的电子-正电子碰撞数据,对标准模型的双希格斯-双重扩展(2 HDM)预测的带电希格斯玻色子玻色子进行了搜索。带电的希格斯玻色子被认为是成对产生的,并衰变为q qbar,τ nu或A W+-。未观察到信号。与模型无关的限制荷电希格斯玻色子生产截面的推导结合这些结果与以前的搜索在较低的能量。假设BR(H+- -> tau nu)+ BR(H+- -> qq)=1,由一般的2 HDM II型模型激发,给出了[m(H+-),BR(H+- -> tau nu)]平面上的排除区域,并在95%的置信水平下排除了质量高达76.3 GeV的带电希格斯玻色子玻色子,与分支比BR(H+- -> tau nu)无关。扫描的2 HDM I型模型的参数空间进行和限制希格斯玻色子质量m(H+-)和m(A)的不同选择的tan(β)。

英文摘要:

A search is made for charged Higgs bosons predicted by Two-Higgs-Doublet extensions of the Standard Model (2HDM) using electron-positron collision data collected by the OPAL experiment at sqrt(s)=189-209 GeV, corresponding to an integrated luminosity of approximately 600 pb-1. Charged Higgs bosons are assumed to be pair-produced and to decay into q qbar, tau nu or A W+-. No signal is observed. Model-independent limits on the charged Higgs-boson production cross section are derived by combining these results with previous searches at lower energies. Under the assumption BR(H+- -> tau nu) + BR(H+- -> qq)=1, motivated by general 2HDM type II models, excluded areas on the [m(H+-), BR(H+- -> tau nu)] plane are presented and charged Higgs bosons are excluded up to a mass of 76.3 GeV at 95% confidence level, independent of the branching ratio BR(H+- -> tau nu). A scan of the 2HDM type I model parameter space is performed and limits on the Higgs-boson masses m(H+-) and m(A) are presented for different choices of tan(beta).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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