论文标题
威尔逊系数和天然零从壳上的角度来看
Wilson Coefficients and Natural Zeros from the On-Shell Viewpoint
论文作者
论文摘要
我们展示了如何通过使用壳方法来简化从重粒子到EFT Wilson系数的有限贡献的计算。我们将该技术应用于$ G-2 $和$Hγγ$的一环计算，以表明如何从树级振幅的产物中获得有限的贡献。在某些情况下，由于这些幅度的均等对称性，如文献中所示，总贡献总计高达零。我们的方法允许搜索新的天然零，并以直接的方式获得非零贡献。
We show how to simplify the calculation of the finite contributions from heavy particles to EFT Wilson coefficients by using on-shell methods. We apply the technique to the one-loop calculation of $g-2$ and $Hγγ$, showing how finite contributions can be obtained from the product of tree-level amplitudes. In certain cases, due to a parity symmetry of these amplitudes, the total contribution adds up to zero, as previously found in the literature. Our method allows to search for new natural zeros, as well as to obtain non-zero contributions in a straightforward way.
