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首页> 外文期刊>Physical review, D >Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings
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Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings

机译：Higgs Boson至γz衰减作为风味变形中性yukawa联轴器的探头

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With the deeper study of Higgs particle, Higgs precision measurements can be served to probe new physics indirectly. In many new physics models, vectorlike quarks T L , T R occur naturally. It is important to probe their couplings with standard model particles. In this work, we consider the singlet T L , T R extended models and show how to constrain the T t h couplings through the h → γ Z decay at high-luminosity LHC. First, we derive the perturbative unitarity bounds on | y L , R t T | with other couplings set to be zeros simply. To optimize the situation, we take m T = 400 ? ? GeV and s L = 0.2 considering the experimental constraints. Under this benchmark point, we find that the future bounds from h → γ Z decay can limit the real parts of y L , R t T in the positive direction to be O(1) because of the double enhancement. For the real parts of y L , R t T in the negative direction, it is always surpassed by the perturbative unitarity. Moreover, we find that the top quark electric dipole moment can give stronger bounds (especially the imaginary parts of y L , R t T ) than the perturbative unitarity and h → γ Z decay in the off-axis regions for some scenarios.
机译：随着对HIGGS粒子的深入研究，HIGGS精确测量可以间接探测新物理。在许多新的物理模型中，矢量样夸克T L，T r自然发生。探测其与标准模型颗粒的联轴器探讨。在这项工作中，我们考虑单次SINGLT T L，T R扩展模型，并展示如何通过H→γZ衰变在高亮度LHC中约束T T H耦合。首先，我们派生了刺痛的统一界限y l，r t t |与其他联轴器设置为零。为了优化这种情况，我们拿到了m t = 400？还考虑到实验约束，GEV和S L = 0.2。在这个基准点下，我们发现来自H→γZ衰减的未来界限可以在正方向上限制Y L，R T T的实际部分，因为双重增强是o（1）。对于Y L，R T T的真实部位，R T T在负方向上，它总是被扰动的统一程度超越。此外，我们发现顶部夸克电偶极瞬间可以给出更强的边界（特别是Y L，R T T）的界限，而不是在某些情况下扰动的统一区域和H→γZ衰减。

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