Iterative Monte Carlo analysis of spin-dependent parton distributions ITERATIVE MONTE CARLO ANALYSIS of SPIN- ... SATO et al.
Journal
Physical Review D
Journal Volume
93
Journal Issue
7
Date Issued
2016
Author(s)
Sato N
Melnitchouk W
Kuhn S.E
Ethier J.J
Jefferson Lab Angular Momentum Collaboration
Accardi A
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 d2 moment of the nucleon within a global PDF analysis. © 2016 American Physical Society.
Type
journal article