The hadronic contribution to the running of the electromagnetic coupling and the electroweak mixing angle
The hadronic contribution to the running of the electromagnetic coupling and the electroweak mixing angle
The electromagnetic coupling $\alpha$ and the electroweak mixing angle $\theta_{\mathrm{W}}$ are parameters of the Standard Model (SM) that enter precision SM tests and play a fundamental rôle in beyond SM physics searches. Their values are energy dependent, and non-perturbative hadronic contributions are the main source of uncertainty to the theoretical …