The Euclidean Adler Function and its Interplay with $\Delta {\alpha }_{\mathrm{QED}}^{\mathrm{had}}$ and ${\alpha }_s$

M. Davier, D. Díaz-Calderón, B. Malaescu +3

Three different approaches to precisely describe the Adler function in the Euclidean regime at around $2\mathrm{GeVs}$ are available: dispersion relations based on the hadronic…