1. Generalized parton distributions of the proton from lattice QCD
- Author
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Scapellato, Aurora, Alexandrou, Constantia, Cichy, Krzysztof, Constantinou, Martha, Hadjiyiannakou, Kyriakos, Jansen, Karl, and Steffens, Fernanda
- Subjects
High Energy Physics::Lattice ,FOS: Physical sciences ,parton: distribution function ,mass [pi] ,hadron: structure ,pi: mass ,transversity [generalized parton distribution] ,generalized parton distribution: transversity ,High Energy Physics - Lattice ,ddc:530 ,fermion: mass: twist ,Nuclear Experiment ,lattice ,generalized parton distribution [p] ,generalized parton distribution: isovector ,High Energy Physics::Phenomenology ,High Energy Physics - Lattice (hep-lat) ,lattice field theory ,p: generalized parton distribution ,structure [hadron] ,isovector [generalized parton distribution] ,helicity ,mass: twist [fermion] ,distribution function [parton] ,statistical - Abstract
38th International Symposium on Lattice Field Theory, Lattice 2021, Online, United States, 26 Jul 2021 - 30 Jul 2021; Proceedings of Science / International School for Advanced Studies (LATTICE2021), 129 (2022). doi:10.22323/1.396.0129, Generalized parton distributions (GPDs) are among the most fundamental quantities for describing the internal structure of hadrons. In this work, we present results on isovector GPDs of the proton obtained within lattice Quantum Chromodynamics. We use the quasi-distribution formalism and perform the calculations on an ensemble of $N_f = 2 + 1 + 1$ twisted mass fermions, with pion mass $M_\pi=260$~MeV and lattice spacing $a\simeq 0.093$~fm. Results are presented for unpolarized, helicity, and transversity GPDs at zero and nonzero skewness with controlled statistical uncertainties. Comparisons with their forward limit show qualitative features anticipated from model calculations., Published by SISSA, Trieste
- Published
- 2022
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