HWW顶点中的CP奇形式因子
$CP$-odd form factor in the $HWW$ vertex
AI总结：
本文在标准模型下重新研究HWW顶点的CP奇形式因子，首次对其数值计算，发现夸克圈贡献远低于实验灵敏度，并通过三体衰变不对称性研究其唯象学意义。
AI中文摘要：
我们在标准模型（SM）框架下重新研究HWW顶点中的CP奇形式因子，该因子仅在其中一个W玻色子离壳时通过单圈过程产生。据我们所知，本文首次对该形式因子进行数值计算。夸克圈的相关贡献量级为10⁻⁵，远低于当前实验灵敏度。我们通过三体衰变中无极化和极化观测量的不对称性研究其唯象学意义。
英文摘要：
We revisit the $CP$-odd form factor in the $HWW$ vertex within the Standard Model (SM), which is induced only at the one-loop level when one of the $W$ bosons is off-shell. To the best of our knowledge, the numerical evaluation of this form factor is presented for the first time. The relevant contributions from quark loops are of order $10^{-5}$, well below the current experimental sensitivity. The phenomenological implications are studied through asymmetries in unpolarized and polarized observables in three-body decays.
