Scrutinizing the alignment limit in two-Higgs-doublet models. II. mH=125 GeV
Scrutinizing the alignment limit in two-Higgs-doublet models. II. mH=125 GeV
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DOI：
10.1103/physrevd.93.035027
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发表时间：
2016-02-29
影响因子：
5
通讯作者：
Kraml, Sabine
中科院分区：
文献类型：
--
作者：
Bernon, Jeremy;Gunion, John F.;Kraml, Sabine
在多重双态希格斯扇区的对准极限中，希格斯质量本征态之一在场空间中与标量场真空期望值的方向对准，并且其耦合接近标准模型（SM）希格斯玻色子的耦合。我们考虑接近对准极限的 I 型和 II 型 CP 守恒双希格斯双峰模型 (2HDM)，其中两个 CP 偶数希格斯玻色子 H 中较重的一个是质量为 125 GeV 时观察到的类 SM 态，并且 H 与规范玻色子的耦合接近 SM 的耦合。我们回顾了理论结构并分析了这种对齐极限的特殊实现的现象学含义，其中考虑到较轻的 CP 偶态 h 根据定义必须具有低于 125 GeV 的质量，因此无法发生额外状态的解耦。对于数值分析，我们使用软件包 2HDMC 和 Lilith 对 2HDM 参数空间进行扫描，考虑到所有相关的大型强子对撞机之前的约束、大型强子对撞机上 125 GeV 希格斯信号测量的约束，以及来自搜索其他类希格斯态的最新限制。还讨论了大型强子对撞机运行 2 的影响，包括观察其他标量态的期望。
In the alignment limit of a multidoublet Higgs sector, one of the Higgs mass eigenstates aligns in field space with the direction of the scalar field vacuum expectation values, and its couplings approach those of the Standard Model (SM) Higgs boson. We consider CP-conserving two-Higgs-doublet models (2HDMs) of type I and type II near the alignment limit in which the heavier of the two CP-even Higgs bosons, H, is the SM-like state observed with a mass of 125 GeV, and the couplings of H to gauge bosons approach those of the SM. We review the theoretical structure and analyze the phenomenological implications of this particular realization of the alignment limit, where decoupling of the extra states cannot occur given that the lighter CP-even state h must, by definition, have a mass below 125 GeV. For the numerical analysis, we perform scans of the 2HDM parameter space employing the software packages 2HDMC and Lilith, taking into account all relevant pre-LHC constraints, constraints from the measurements of the 125 GeV Higgs signal at the LHC, as well as the most recent limits coming from searches for other Higgs-like states. Implications for Run 2 at the LHC, including expectations for observing the other scalar states, are also discussed.