C7: Temporal Contact Terms in Lattice Feynman-Hellmann Methods

28 Jul 2021, 08:00
1h
Poster Hadron Structure Poster

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.

Primary authors

Alec Hannaford Gunn (The University of Adelaide) Eddie Sankey (University of Adelaide) Ross Young James Zanotti (University of Adelaide) Kadir Utku Can (RIKEN)

Presentation materials