Abstract: In this talk, I will be highlighting QCDSF/UKQCD Collaboration's recent developments on computing the Compton amplitude in a lattice approach. I briefly discuss how to access the Compton amplitude directly via the second-order Feynman-Hellmann theorem and as an application, present a calculation of the nucleon Compton tensor across a range of photon momenta. 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. I will also discuss possible further applications of this approach and present some preliminary results.
Speaker: Utku Can, the University of Adelaide.
Reference: https://arxiv.org/abs/2007.01523.
Discussion Panel: Robert Perry (National Yang Ming Chiao Tung University), Raza Sabbir Sufian (William-Mary College and Jefferson Lab).