Probing double-aligned two-Higgs-doublet models at the LHC
Probing double-aligned two-Higgs-doublet models at the LHC
复制标题
在大型强子对撞机上探测双对齐的双希格斯双峰模型
DOI：
10.1103/physrevd.105.115001
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发表时间：
2022
影响因子：
5
通讯作者：
Yagyu Kei
中科院分区：
文献类型：
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作者：
Kanemura Shinya;Takeuchi Michihisa;Yagyu Kei
我们考虑两个希格斯双重态模型（thdm），其中希格斯势和汤川相互作用都是对齐的，我们称之为“双对齐thdm”。在这种情况下，发现的希格斯玻色子与标准模型（SM）粒子的耦合常数与SM希格斯玻色子的耦合常数相同，并且通过中性希格斯玻色子改变中性电流不会出现在树的水平上。我们利用风味实验的测量结果和LHC的多轻子终态数据，研究了该模型的当前限制和未来前景。特别地，我们关注的是质量在下面的额外希格斯玻色子的电弱对的产生。我们发现，当附加希格斯玻色子的轻子衰减占主导地位时，大多数参数空间已经被当前的LHC数据所排除，这可以解释为x型THDM中的特殊情况。我们还明确了高亮度LHC可以探索的参数区域，并演示了在几个基准点上从最终状态重建额外希格斯玻色子的质量。
We consider two Higgs doublet models (THDMs) with both the Higgs potential and Yukawa interactions being aligned, which we call “double-aligned THDMs.” In this scenario, coupling constants of the discovered Higgs boson to the Standard Model (SM) particles are identical to those of the SM Higgs boson, and flavor changing neutral currents via neutral Higgs bosons do not appear at tree level. We investigate current constraints and future prospects of the model by using measurements from flavor experiments and data of multilepton final states at LHC. Especially, we focus on the electroweak pair production of the additional Higgs bosons with their masses below. We find that the most of the parameter space are already excluded by the current LHC data when the leptonic decays of the additional Higgs bosons are dominant, which can be interpreted to the scenario in the Type-X THDM as a special case. We also clarify the parameter region where the high-luminosity LHC can explore, and demonstrate the reconstruction of the masses of additional Higgs bosons from thefinal states in a few benchmark points.