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Extraction of Next-to-Next-to-Leading-Order Parton Distribution Functions from Lattice QCD Calculations
- Source :
- Physical Review Letters
- Publication Year :
- 2020
-
Abstract
- We present for the first time complete next-to-next-to-leading-order coefficient functions to match flavor nonsinglet quark correlation functions in position space, which are calculable in lattice QCD, to parton distribution functions (PDFs). Using PDFs extracted from experimental data and our calculated matching coefficients, we predict valence-quark correlation functions that can be confronted by lattice QCD calculations. The uncertainty of our predictions is greatly reduced with higher order matching coefficients. By performing Fourier transformation, we also obtain matching coefficients for corresponding quasi-PDFs and pseudo-PDFs. Our method of calculations can be readily generalized to evaluate the matching coefficients for sea-quark and gluon correlation functions, making the program to extract partonic structure of hadrons from lattice QCD calculations comparable with and complementary to that from experimental measurements.
- Subjects :
- Quark
Physics
Particle physics
High Energy Physics::Lattice
High Energy Physics::Phenomenology
Hadron
General Physics and Astronomy
Position and momentum space
Parton
Lattice QCD
01 natural sciences
Gluon
symbols.namesake
Fourier transform
Distribution function
0103 physical sciences
symbols
High Energy Physics::Experiment
010306 general physics
Subjects
Details
- ISSN :
- 10797114
- Volume :
- 126
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Physical review letters
- Accession number :
- edsair.doi.dedup.....80b2fe544d3d6b8fb54a473f1d60e4da