Moments and power corrections of longitudinal and transverse proton structure functions from lattice QCD

QCDSF-UKQCD-CSSM Collaboration, M. Batelaan, K. U. Can*, A. Hannaford-Gunn, R. Horsley, Y. Nakamura, H. Perlt, P. E. L. Rakow, G. Schierholz, H. Stüben, R. D. Young, J. M. Zanotti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We present a simultaneous extraction of the moments of F2 and FL structure functions of the proton for a range of photon virtuality, Q2. This is achieved by computing the forward Compton amplitude on the lattice utilizing the second-order Feynman-Hellmann theorem. Our calculations are performed on configurations with two different lattice spacings and volumes, all at the SU(3) symmetric point. We find the moments of F2 and FL in good agreement with experiment. Power corrections turn out to be significant. This is the first time the Q2 dependence of the lowest moment of F2 has been quantified.
Original languageEnglish
Article number054503
Pages (from-to)1-11
Number of pages11
JournalPhysical Review D
Volume107
Issue number5
Early online date1 Mar 2023
DOIs
Publication statusPublished - 13 Mar 2023

Keywords / Materials (for Non-textual outputs)

  • hep-lat
  • hep-ph
  • nucl-th

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