U(1)_X超对称标准模型中h的对产生
Pair production of $h$ in the $U(1)_X$SSM
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中文总结 AI 辅助
本文在U(1)_XSSM中研究14TeV LHC上gg→hh的产生过程，分析截面的参数依赖，发现g_X和g_{YX}是最敏感参数，其结果为高亮度LHC的新物理寻找提供指导。
中文摘要 AI 辅助
希格斯对产生是探测希格斯自相互作用和希格斯势结构的重要手段。我们在U(1)_X超对称标准模型（U(1)_XSSM）中，研究了14TeV大型强子对撞机（LHC）上通过胶子融合产生最轻中性希格斯对的过程gg→hh。作为最小超对称标准模型（MSSM）的U(1)扩展，该模型引入了新的超场，为产生振幅带来了额外的单圈贡献。我们数值分析了截面的参数依赖关系，并给出了二维参数平面中的等高线分布。结果表明，规范耦合g_X和g_{YX}是最敏感的参数，在当前实验约束下该模型会产生显著的新物理修正。这项工作有助于理解U(1)_XSSM中的希格斯物理，并为高亮度LHC的新物理寻找提供指导。
英文摘要
Higgs pair production provides an important probe of the Higgs self-interaction and the Higgs potential structure. We study the lightest neutral Higgs pair production process $gg \to hh$ via gluon fusion at the 14 TeV LHC, in the $U(1)_X$ supersymmetric standard model. As a $U(1)$ extension of the minimal supersymmetric standard model (MSSM), this model introduces new superfields that bring additional one-loop contributions to the production amplitude. We analyze the parameter dependence of the cross section numerically and present contour distributions in two-dimensional parameter planes. The results indicate that the gauge couplings $g_X$ and $g_{YX}$ are the most sensitive parameters, and the model yields sizable new physics corrections under current experimental constraints. This work helps to understand Higgs physics in the $U(1)_X$SSM and guides new physics searches at the high-luminosity LHC.
