Two-Higgs-doublet type-II and -III models and $$t\rightarrow c h$$t→ch at the LHC
Two-Higgs-doublet type-II and -III models and $$t\rightarrow c h$$t→ch at the LHC
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DOI：
10.1140/epjc/s10052-016-4167-9
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发表时间：
2015-08
期刊：
影响因子：
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通讯作者：
A. Arhrib;R. Benbrik;C. Chen;M. Gomez-Bock;S. Semlali
中科院分区：
文献类型：
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作者：
A. Arhrib;R. Benbrik;C. Chen;M. Gomez-Bock;S. Semlali
我们研究了一般双希格斯双重态模型（2HDM） iii型的约束和新的汤川耦合的影响。为了进行比较，我们重新审视了2HDM ii型的分析。为了了解所有涉及自由参数的影响并实现它们之间的相关性，我们采用了a平方拟合方法，包括理论和实验约束，如S， T和U倾斜参数，标准模型希格斯的产生及其衰变等。分析的误差分别为68、95.5和置信水平。由于新的汤川耦合与和相关联，我们发现当指示参数为正值时，iii型模型中的允许区域可以更宽；然而，对于负，限制比ii型模型更严格。通过使用约束参数，我们发现与SM的偏差可以为。此外，我们还研究了iii型模型中在树水平诱导的顶夸克风味变化过程，发现当考虑所有当前实验数据时，我们得到了forandgev，略超过forgev。
We study the constraints of the generic two-Higgs-doublet model (2HDM) type-III and the impacts of the new Yukawa couplings. For comparisons, we revisit the analysis in the 2HDM type-II. To understand the influence of all involving free parameters and to realize their correlations, we employ a-square fitting approach by including theoretical and experimental constraints, such as the S, T, and U oblique parameters, the production of standard model Higgs and its decay to,,, etc. The errors of the analysis are taken at 68, 95.5, andconfidence levels. Due to the new Yukawa couplings being associated withand, we find that the allowed regions forandin the type-III model can be broader when the dictated parameteris positive; however, for negative, the limits are stricter than those in the type-II model. By using the constrained parameters, we find that the deviation from the SM incan be of. Additionally, we also study the top-quark flavor-changing processes induced at the tree level in the type-III model and find that when all current experimental data are considered, we getforandGeV, andslightly exceedsforGeV.