Ab-initio electroweak corrections to superallowed ${\hat{I}}^2$ decays and their impact on $V_{ud}$

Vincenzo Cirigliano, Wouter Dekens, Jordy de Vries +3

Radiative corrections are essential for an accurate determination of $V_{ud}$ from superallowed ${\hat{I}}^2$ decays. In view of recent progress in the single-nucleon sector, the uncertaint…