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dc.contributor.authorCan, K.U.en
dc.contributor.authorHannaford-Gunn, A.en
dc.contributor.authorHorsley, R.en
dc.contributor.authorNakamura, Y.en
dc.contributor.authorPerlt, H.en
dc.contributor.authorRakow, P.E.L.en
dc.contributor.authorSchierholz, G.en
dc.contributor.authorSomfleth, K.Y.en
dc.contributor.authorStüben, H.en
dc.contributor.authorYoung, R.D.en
dc.contributor.authorZanotti, J.M.en
dc.identifier.citationPhysical Review D, 2020; 102(11):114505-1-114505-18en
dc.descriptionPublished 8 December 2020en
dc.description.abstractThe forward Compton amplitude describes the process of virtual photon scattering from a hadron and provides an essential ingredient for the understanding of hadron structure. As a physical amplitude, the Compton tensor naturally includes all target mass corrections and higher twist effects at a fixed virtuality, Q². By making use of the second-order Feynman-Hellmann theorem, the nucleon Compton tensor is calculated in lattice QCD at an unphysical quark mass across a range of photon momenta 3 ≲ Q² ≲ 7 GeV². This allows for the Q² dependence of the low moments of the nucleon structure functions to be studied in a lattice calculation for the first time. The results demonstrate that a systematic investigation of power corrections and the approach to parton asymptotics is now within reach.en
dc.description.statementofresponsibilityK. U. Can, A. Hannaford-Gunn, R. Horsley, Y. Nakamura, H. Perlt, P. E. L. Rakow, G. Schierholz, K. Y. Somfleth, H. Stüben, R. D. Young, and J. M. Zanotti (QCDSF/UKQCD/CSSM Collaborations)en
dc.publisherAmerican Physical Societyen
dc.rightsPublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.en
dc.titleLattice QCD evaluation of the Compton amplitude employing the Feynman-Hellmann theoremen
dc.typeJournal articleen
dc.identifier.orcidCan, K.U. [0000-0002-7052-1421]en
dc.identifier.orcidYoung, R.D. [0000-0002-4527-1811]en
dc.identifier.orcidZanotti, J.M. [0000-0002-3936-1597]en
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