Moments of nucleon spin-dependent generalized parton distributions
W. Schroers (1), R.C. Brower (2), P. Dreher (1), R. Edwards (3), G., Fleming (3), Ph. Hagler (1), U.M. Heller (4), Th. Lippert (5), J.W. Negele, (1), A.V. Pochinsky (1), D.B. Renner (1), D. Richards (3), K. Schilling (5), ((1) MIT, (2) Boston U., (3) JLab, (4) APS
TL;DR
This paper reports lattice QCD calculations of the first two moments of spin-dependent generalized parton distributions, providing insights into nucleon spin structure and axial coupling constants.
Contribution
It introduces new lattice QCD measurements of spin-dependent GPD moments using Wilson and domain-wall fermions, advancing understanding of nucleon spin structure.
Findings
Determined the axial coupling constant from lattice data.
Calculated the second moment of the spin-dependent forward parton distribution.
Compared results from Wilson fermions and domain-wall fermions.
Abstract
We present a lattice measurement of the first two moments of the spin-dependent GPD H-tilde(x,xi,t). From these we obtain the axial coupling constant and the second moment of the spin-dependent forward parton distribution. The measurements are done in full QCD using Wilson fermions. In addition, we also present results from a first exploratory study of full QCD using Asqtad sea and domain-wall valence fermions.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research