Perturbative contributions to \Delta αˆ{(5)}(mˆ2_z)

The fine structure constant is a fundamental parameter in the Standard Model, playing a crucial role in computing a wide range of observables and consistency relations. While the current error on $\Delta\alpha(M_Z)$ is at the level of $\sim10^{-4}$, future requirements, such as those of the FCC-ee/ILC, demand a reduction. In this talk, I present an updated calculation of the hadronic contribution to $\Delta\alpha(M_Z)$. I will review different computational methods, such as the explicit integration in the timelike , renormalization group equations (RGE), and the euclidean split technique. Our results emphasizes the importance of accurately accounting for the charm quark contributions.

https://cuaieed-unam.zoom.us/j/83855042669?pwd=b2FjVTVhYk5zSjJXT0xHc3NNUS9tdz09

Meeting ID: 838 5504 2669
Passcode: 244614