Radiative corrections to decay branching ratios of the CP-odd Higgs boson in two Higgs doublet models
Radiative corrections to decay branching ratios of the CP-odd Higgs boson in two Higgs doublet models
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DOI：
10.1016/j.nuclphysb.2022.116047
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发表时间：
2022-07
影响因子：
2.8
通讯作者：
Masashi Aiko;S. Kanemura;K. Sakurai
中科院分区：
文献类型：
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作者：
Masashi Aiko;S. Kanemura;K. Sakurai
计算了四种具有软破缺离散Z2对称性的双Higgs偶态模型中CP奇Higgs玻色子A衰变率的辐射修正.衰变分支比在次领先的顺序电弱修正和次领先的次领先的顺序QCD修正。我们全面研究了电弱修正对衰变率和分支比的影响。我们发现辐射修正可以大幅度地改变分支比，特别是在近对准情形下，类SM Higgs玻色子h的耦合常数与标准模型中的耦合常数接近，A→ Zh衰变模式的分支比更大.我们还显示了A的分支比和包括高阶修正的SM-样希格斯玻色子耦合的标度因子之间的相关性。此外，我们显示的衰减模式依赖于类型的汤川相互作用的特征预测，通过它，我们可以区分类型的汤川相互作用在未来的对撞机实验。
We calculate radiative corrections to decay rates of CP-odd Higgs boson A for various decay modes in the four types of two Higgs doublet models with the softly broken discrete Z 2 symmetry. The decay branching ratios are evaluated at the next-to-leading order for electroweak corrections and the next-to-next-to-leading order for QCD corrections. We comprehensively study the impact of the electroweak corrections on the decay rates and the branching ratios. We find that the radiative corrections can sizably modify the branching ratios, especially for the A→ Z h decay mode in the nearly alignment scenario, where coupling constants of the SM-like Higgs boson h are close to those in the standard model. We also show correlations between the branching ratios of A and the scaling factor of the SM-like Higgs boson coupling including higher-order corrections. In addition, we show characteristic predictions on the decay pattern depending on the types of Yukawa interaction, by which we can discriminate the types of Yukawa interaction in future collider experiments.