Speaker
Description
Precision measurements of superallowed nuclear Beta decays provide an important test of the Standard Model through the determination of Vud. Interpreting these measurements requires an accurate understanding of the effects of the strong interaction on electroweak radiative corrections at low momentum transfer. In this regime, perturbative methods are no longer applicable, motivating first-principles numerical simulations of quantum chromodynamics using lattice QCD. One quantity relevant to these radiative corrections is the first Nachtmann moment of the parity-violating structure function F3_gammaZ, which can be determined using the Feynman-Hellmann method. Our calculations are performed for the pion, providing a clean environment to investigate this approach, with future applications to nucleon calculations relevant for precision determinations of Vud.