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arXiv 0706.2997hep-ph
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双Higgs模型参数空间的约束

Constraining the Two-Higgs-Doublet-Model parameter space

Abdul Wahab El Kaffas, Odd Magne Ogreid, Per Osland

摘要:

我们面对的双希格斯双重模型的各种实验约束以及理论的一致性条件。最具约束力的数据是\bar B \to X_sγ衰变率(在低M_{H^\pm}值时)和Δρ(在低和高M_{H^\pm}值时)。我们还考虑了B \bar B振荡率和R_b,或宽度Γ(Z \to b \bar b)(这两个参数都限制了模型在低\tan β值时的稳定性),以及B^- \to τν_τ衰减率(它限制了模型在高\tan β和低M_{H^\pm}时的稳定性).此外,LEP 2未发现的轻,中性希格斯玻色子被认为是,以及μ子异常磁矩。由于微扰么正性排除了\tan β的高值,因此该模型被证明是非常受约束的。我们概述了\tan β- M_{H^\pm}平面上两个最轻中性希格斯玻色子的不同质量值的剩余允许区域,并描述了它们的一些性质。

英文摘要:

We confront the Two-Higgs-Doublet Model with a variety of experimental constraints as well as theoretical consistency conditions. The most constraining data are the \bar B\to X_sγdecay rate (at low values of M_{H^\pm}), and Δρ(at both low and high M_{H^\pm}). We also take into account the B\bar B oscillation rate and R_b, or the width Γ(Z\to b\bar b) (both of which restrict the model at low values of \tanβ), and the B^-\toτν_τdecay rate, which restricts the model at high \tanβand low M_{H^\pm}. Furthermore, the LEP2 non-discovery of a light, neutral Higgs boson is considered, as well as the muon anomalous magnetic moment. Since perturbative unitarity excludes high values of \tanβ, the model turns out to be very constrained. We outline the remaining allowed regions in the \tanβ-M_{H^\pm} plane for different values of the masses of the two lightest neutral Higgs bosons, and describe some of their properties.

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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