Nucleon Parton Distribution Functions from Boosted Correlations in the Coulomb Gauge
ORAL
Abstract
Recently, a novel approach has been suggested to compute parton distributions through the use of boosted correlators fixed in the Coulomb gauge from lattice QCD, within the framework of Large-Momentum Effective Theory (LaMET). This approach circumvents the need for Wilson lines, potentially enhancing the efficiency and accuracy of lattice QCD calculations significantly. In this study, we implement the Coulomb gauge method to calculate the unpolarized and helicity parton distribution functions (PDFs) of nucleons. Following a careful investigation of the excited state contamination and various systematic uncertainties, we provide final results of the nucleon PDFs obtained from lattice calculations, which show compatibility with global fits. This research also serves as a benchmark for future broader applications of the Coulomb gauge method, particularly in the computation of transverse-momentum-dependent distributions.
*This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics through Contract No. DE-SC0012704, No. DE-AC02-06CH11357, within the framework of Scientific Discovery through Advanced Computing (SciDAC) award Fundamental Nuclear Physics at the Exascale and Beyond, and under the umbrella of the Quark-Gluon Tomography (QGT) Topical Collaboration with Award DE-SC0023646. This work is also partially supported by the Laboratory Directed Research and Development (LDRD) funding from Argonne National Laboratory, provided by the Director, Office of Science, of the U.S. Department of Energy under Contract No. DE-AC02-06CH11357.
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Presenters
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Jinchen He
- University of Maryland, College Park