Scaling and higher twist in the nucleon Compton amplitude
Abstract
The partonic structure of hadrons plays an important role in a vast array of high-energy and nuclear physics experiments. It also underpins the theoretical understanding of hadron structure. Recent developments in lattice QCD offer new opportunities for reliably studying partonic structure from first principles. Here we report on the use of the Feynman-Hellmann theorem to study the forward Compton amplitude in the unphysical region. We demonstrate how this amplitude provides direct constraint on hadronic inelastic structure functions. The use of external momentum transfer allows us to study the evolution to explore the onset of asymptotic scaling and reveal higher-twist effects in partonic structure.
Cite
@article{arxiv.2001.05090,
title = {Scaling and higher twist in the nucleon Compton amplitude},
author = {A. Hannaford-Gunn and R. Horsley and Y. Nakamura and H. Perlt and P. E. L. Rakow and G. Schierholz and K. Somfleth and H. Stüben and R. D. Young and J. M. Zanotti},
journal= {arXiv preprint arXiv:2001.05090},
year = {2020}
}
Comments
7 pages, 5 figures; presented at the 37th International Symposium on Lattice Field Theory (Lattice2019), 16-22 June 2019, Wuhan, China