We study the decay of the SM Higgs boson to a massive charm quark pair at the next-to-next-to-leading order QCD and next-to-leading order electroweak. At the second order of QCD coupling, we consider the exact calculation of flavour-singlet contributions where the Higgs boson couples to the internal top and bottom quark. Helpful information on the running mass effects related to Yukawa coupling may be obtained by analyzing this process. High precision production for within the SM makes it possible to search for new physics that may induce relatively large interactions related to the charm quark. As an example, we evaluate the axion-like particle associate production with a charm quark pair in the Higgs decay and obtain some constraints for the corresponding parameters under some assumptions.

我们研究了 SM Higgs 玻色子在次先序 QCD 和次于领先序电弱时衰变成一个巨大的粲夸克对。在 QCD 耦合的二阶，我们考虑了希格斯玻色子耦合到内部顶夸克和底夸克的风味-单重态贡献的精确计算。通过分析此过程，可以获得有关与汤川耦合相关的运行质量效应的有用信息。SM 内的高精度生产使得寻找可能引起与粲夸克相关的较大相互作用的新物理学成为可能。例如，我们评估了希格斯衰变中粲夸克对的类轴子粒子关联产生，并在某些假设下获得了对相应参数的一些约束。