Report/Contribution to a conference proceedings

PUBDB-2020-00404

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Scaling and higher twist in the nucleon Compton amplitude

Hannaford-Gunn, A. ; Horsley, R. ; Nakamura, Y. ; Perlt, H. ; Rakow, P. E. L. ; Schierholz, G.DESY* ; Somfleth, K. ; Stüben, H. ; Young, R. D. ; Zanotti, J. M.

2020

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Please use a persistent id in citations: doi:10.3204/PUBDB-2020-00404

Report No.: ADP-20-2/T1112; DESY-20-004; Liverpool LTH 1223; arXiv:2001.05090

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 $Q^2$ evolution to explore the onset of asymptotic scaling and reveal higher-twist effects in partonic structure.

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2020

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