Speaker
Alec Hannaford Gunn
(The University of Adelaide)
Description
Recently, Feynman-Hellmann methods have been used to calculate four-point functions in lattice QCD, specifically the forward and off-forward Compton amplitudes. However, these calculations are subject to discretisation artifacts from where the two currents are inserted on the same time slice. Here, we discuss the effects of these temporal contact terms, especially their contribution to the "subtraction function", and techniques to remove them.
Authors
Alec Hannaford Gunn
(The University of Adelaide)
Eddie Sankey
(University of Adelaide)
Ross Young
James Zanotti
(University of Adelaide)
Kadir Utku Can
(RIKEN)
