https://scholars.lib.ntu.edu.tw/handle/123456789/572126
Title: | Confronting lattice parton distributions with global QCD analysis | Authors: | Bringewatt J NOBUO SATO Melnitchouk W Qiu J.-W Steffens F Constantinou M. |
Issue Date: | 2021 | Journal Volume: | 103 | Journal Issue: | 1 | Source: | Physical Review D | Abstract: | We present the first Monte Carlo based global QCD analysis of spin-averaged and spin-dependent parton distribution functions (PDFs) that includes nucleon isovector matrix elements in coordinate space from lattice QCD. We investigate the degree of universality of the extracted PDFs when the lattice and experimental data are treated under the same conditions within the Bayesian likelihood analysis. For the unpolarized sector, we find rather weak constraints from the current lattice data on the phenomenological PDFs, and difficulties in describing the lattice matrix elements at large spatial distances. In contrast, for the polarized PDFs we find good agreement between experiment and lattice data, with the latter providing significant constraints on the spin-dependent isovector quark and antiquark distributions. ? 2021 authors. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099275822&doi=10.1103%2fPhysRevD.103.016003&partnerID=40&md5=6bf65a746fe59f983399881e72828959 https://scholars.lib.ntu.edu.tw/handle/123456789/572126 |
ISSN: | 24700010 | DOI: | 10.1103/PhysRevD.103.016003 |
Appears in Collections: | 數學系 |
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