26th Australian Institute of Physics Congress and the Australian and New Zealand Conference on Optics and Photonics

Nachtmann moment of the parity-violating structure function from the Feynman-Hellmann method

Not scheduled

20m

Belinda Hutchinson Building (The University of Sydney )

Contributed Oral AIP | Nuclear and Particle Physics (NUPP)

Speaker

Jordan Mckee

Description

Precision measurements of superallowed nuclear β decays provide an important test of the Standard Model through the determination of $V_{ud}$. 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 In this regime, perturbative methods are no longer applicable, motivating first-principles numerical simulations of quantum chromodynamics using lattice QCD.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 $F_3^{\gamma Z}$, which we can determine using the Feynman-Hellmann method. Our calculations are performed for nucleon and pion states, providing valuable theoretical input towards reducing hadronic uncertainties in precision determinations of $V_{ud}$.