Jul 26 – 30, 2021
US/Eastern timezone

Compton amplitude and the nucleon structure functions via the Feynman-Hellmann theorem

Jul 26, 2021, 9:15 PM
15m
Oral presentation Hadron Structure Hadron Structure

Speaker

Dr Kadir Utku Can (The University of Adelaide)

Description

We highlight QCDSF/UKQCD Collaboration's recent developments on computing the Compton amplitude directly via an implementation of the second-order Feynman-Hellmann theorem. As an application, we compute the nucleon Compton tensor across a range of photon momenta at an unphysical quark mass. This enables us to study the $Q^2$ dependence of the low moments of the nucleon structure functions in a lattice calculation for the first time. We present some selected results for the moments of the $F_1$, $F_2$ and $F_L$ structure functions and discuss their implications.

Primary author

Dr Kadir Utku Can (The University of Adelaide)

Co-authors

Alec Hannaford Gunn (The University of Adelaide) Roger Horsley (University of Edinburgh) Yoshifumi Nakamura James Zanotti (University of Adelaide) Ross Young Dr Hinnerk Stueben (Konrad-Zuse-Zentrum für Informationstechnik Berlin) Gerrit Schierholz (DESY) Paul Rakow (University of Liverpool) Holger Perlt (University of Leipzig)

Presentation materials