Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

A lattice QCD calculation of the off-forward Compton amplitude and generalised parton distributions

Aug 10, 2022, 6:10 PM
20m
CP1-HSZ/Ground-0.010 - HS2 (CP1-HSZ)

CP1-HSZ/Ground-0.010 - HS2

CP1-HSZ

450
Oral Presentation Hadron Structure Hadron Structure

Speaker

Alec Hannaford Gunn (The University of Adelaide)

Description

A major focus of the new Electron-Ion Collider will be the experimental determination of generalised parton distributions (GPDs). I will give an outline of the CSSM/QCDSF collaboration's determination of GPD properties from a lattice calculation of the off-forward Compton amplitude (OFCA). By determining the OFCA, we can access phenomenologically important properties such as scaling and non-leading-twist contributions, and the subtraction function. We calculated the OFCA for soft momentum transfer $t\in[0.3,1.2]$, and determine moments of the helicity-conserving and -flipping amplitudes, which reduce to their respective GPD moments at leading-twist.

Primary authors

Alec Hannaford Gunn (The University of Adelaide) Gerrit Schierholz (DESY) Hinnerk Stuben (Universitat Hamburg) James Zanotti (University of Adelaide) K. Utku Can (The University of Adelaide) Paul E. L. Rakow (University of Liverpool) Roger Horsley (University of Edinburgh) Ross Young (The University of Adelaide)

Presentation materials