Speaker
Description
Calculations of nucleon structure using lattice QCD are approaching the level of precision necessary to make important impacts on experimental programs. This talk will explore multiple theoretical approaches to calculations of the nucleon axial charge. We present numerical evidence and show that the various approaches have significantly different dependence on excited-state, yielding to ground-state plateaus that are observed to be multiple fm closer to the source location. Additionally, the results further provides evidence supporting the notion that lattice QCD calculations are able to keep excited-state contamination for nucleon correlation functions under control by demonstrating consistency in ground state observables from the different approaches presented today.
