TY  - CONF
AU  - Can, K. U.
AU  - Horsley, R.
AU  - Rakow, P. E. L.
AU  - Schierholz, G.
AU  - Stüben, H.
AU  - Young, R. D.
AU  - Zanotti, J. M.
TI  - Towards nucleon structure function moments and parton momentum fractions from lattice QCD
IS  - arXiv:2505.04033
M1  - PUBDB-2025-02476
M1  - arXiv:2505.04033
M1  - ADP-25-18/T1280
M1  - DESY-25-069
M1  - LTH 1400
M1  - PoS(QCHSC24)085
SP  - 14
PY  - 2024
N1  - 14 pages, 4 figues. Contribution to the the XVIth Quark Confinement and the Hadron Spectrum Conference (QCHSC24) 19-24 August, 2024 Cairns Convention Centre, Cairns, Queensland, Australia   preprint:626424
AB  - We calculate the lowest even isovector moment of the F<sub>2</sub> structure function in 2+1-flavour lattice QCD with varying quark masses corresponding to m<sub>π</sub>  ≈ [410, 360, 300]   MeV, at a fixed volume of V = 48<sup>3</sup> ×96 and coupling β =  5.65 (a = 0.068(3)  fm). We directly compute the physical Compton amplitude using the Feynman-Hellmann approach and extract moments of the physical structure function. We report on the quark-mass dependence of the lowest isovector moment and estimate its value at the physical quark-mass point with  ∼ 10% uncertainty at fixed Q<sup>2</sup>. By analysing the Q<sup>2</sup> dependence of the moments at the SU(3) symmetric point (m<sub>π</sub>  ≈ 410   MeV), we separate the leading- and higher-twist contributions and estimate the parton momentum fraction, 〈x 〉<sub>u−d</sub>, which agrees with existing results.
T2  - 16th Conference on Quark Confinement and the Hadron Spectrum
CY  - 19 Aug 2024 - 24 Aug 2024, Cairns (Australia)
Y2  - 19 Aug 2024 - 24 Aug 2024
M2  - Cairns, Australia
LB  - PUB:(DE-HGF)8
UR  - https://bib-pubdb1.desy.de/record/634228
ER  -