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Iterative Monte Carlo analysis of spin-dependent parton distributions
Sato, Nobuo Melnitchouk, W. Accardi, A. Ethier, J. J.
Sato, Nobuo
Melnitchouk, W.
Accardi, A.
Ethier, J. J.
Abstract
We present a comprehensive new global QCD analysis of polarized inclusive deep-inelastic scattering, including the latest high-precision data on longitudinal and transverse polarization asymmetries from Jefferson Lab and elsewhere. The analysis is performed using a new iterative Monte Carlo fitting technique which generates stable fits to polarized parton distribution functions (PDFs) with statistically rigorous uncertainties. Inclusion of the Jefferson Lab data leads to a reduction in the PDF errors for the valence and sea quarks, as well as in the gluon polarization uncertainty at x > = 0.1. The study also provides the first determination of the flavor -separated twist - 3 PDFs and the d(2) moment of the nucleon within a global PDF analysis.
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2016-01-01
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Physics
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https://doi.org/10.1103/PhysRevD.93.074005