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arXiv 1902.07236hep-ph
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双Higgs偶态模型中光子-光子碰撞中赝标希格斯玻色子对的产生

Pseudoscalar Higgs boson pair production at a photon-photon collision in the two Higgs doublet model

M. Demirci

摘要:

在双Higgs偶线模型下,考虑了完整的单圈贡献,分析了光子-光子碰撞中赝标希格斯玻色子玻色子的直接对产生.为了说明新物理的效果,四个基准点的情况下,这是符合理论和目前的实验约束,选择在THDM的I型与精确的对准限制。在这些基准点中,CP甚至最轻的希格斯玻色子($h^0$)也具有类似于标准模型的规范玻色子耦合。详细研究了每种类型的单回路图对总截面的单独贡献的影响。在入射光子的不同偏振态下,给出了总截面与质心能量的关系。此外,扫描THDM的参数空间中的区域$m_{12}^2-\tanβ$和$m_A-\tanβ$以获得其他参数的某些固定值。在高能量下,盒形图对总截面的贡献比其他图大得多。总截面可以增强两个因素由于相反的偏振光子以及阈值效应。

英文摘要:

In this study, the direct pair production of the pseudoscalar Higgs boson at a photon-photon collision is analyzed in the context of two Higgs doublet model, taking account the complete one-loop contributions. In order to illustrate the effect of the new physics, four benchmark points scenarios, which are consistent with theoretical and current experimental constraints, are chosen in the type-I of THDM with an exact alignment limit. In these benchmark points, the CP even lightest Higgs boson ($h^0$) have the Standard Model like couplings to the gauge bosons. The effect of individual contributions from each type of one-loop diagrams on the total cross section are examined in detail. The dependence of total cross section on the center-of-mass energy is also presented at the various polarization configurations of the incoming photons. Moreover, the regions $m_{12}^2-\tanβ$ and $m_A-\tanβ$ in the parameter space of the THDM are scanned for some fixed values of other parameters. The box-type diagrams make a much larger contribution to the total cross section than the others at high energies. Total cross section can be enhanced by a two factor thanks to opposite polarized photons as well as threshold effects.

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