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Title: Global QCD Analysis of Polarized Parton Densities

Abstract

We focus on some highlights of a recent, first global Quantum Chromodynamics (QCD) analysis of the helicity parton distributions of the nucleon, mainly the evidence for a rather small gluon polarization over a limited region of momentum fraction and for interesting flavor patterns in the polarized sea. It is examined how the various sets of data obtained in inclusive and semi-inclusive deep inelastic scattering and polarized proton-proton collisions help to constrain different aspects of the quark, antiquark, and gluon helicity distributions. Uncertainty estimates are performed using both the robust Lagrange multiplier technique and the standard Hessian approach.

Authors:
 [1]
  1. Institut fuer Theoretische Physik, Universitaet Regensburg, 93040 Regensburg, Germany and Institut fuer Theoretische Physik und Astrophysik, Universitaet Wuerzburg, 97074 Wuerzburg (Germany) and Radiation Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
Publication Date:
OSTI Identifier:
21316918
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1149; Journal Issue: 1; Conference: 18. international spin physics symposium, Charlottesville, VA (United States), 6-11 Oct 2008; Other Information: DOI: 10.1063/1.3215654; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DEEP INELASTIC SCATTERING; FLAVOR MODEL; GLUONS; HELICITY; INCLUSIVE INTERACTIONS; NUCLEONS; PARTICLE STRUCTURE; POLARIZATION; POLARIZED BEAMS; PROTON BEAMS; PROTON-PROTON INTERACTIONS; QUANTUM CHROMODYNAMICS; QUARK-ANTIQUARK INTERACTIONS; QUARKS; SEMI-INCLUSIVE INTERACTIONS

Citation Formats

Stratmann, Marco. Global QCD Analysis of Polarized Parton Densities. United States: N. p., 2009. Web. doi:10.1063/1.3215654.
Stratmann, Marco. Global QCD Analysis of Polarized Parton Densities. United States. https://doi.org/10.1063/1.3215654
Stratmann, Marco. 2009. "Global QCD Analysis of Polarized Parton Densities". United States. https://doi.org/10.1063/1.3215654.
@article{osti_21316918,
title = {Global QCD Analysis of Polarized Parton Densities},
author = {Stratmann, Marco},
abstractNote = {We focus on some highlights of a recent, first global Quantum Chromodynamics (QCD) analysis of the helicity parton distributions of the nucleon, mainly the evidence for a rather small gluon polarization over a limited region of momentum fraction and for interesting flavor patterns in the polarized sea. It is examined how the various sets of data obtained in inclusive and semi-inclusive deep inelastic scattering and polarized proton-proton collisions help to constrain different aspects of the quark, antiquark, and gluon helicity distributions. Uncertainty estimates are performed using both the robust Lagrange multiplier technique and the standard Hessian approach.},
doi = {10.1063/1.3215654},
url = {https://www.osti.gov/biblio/21316918}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1149,
place = {United States},
year = {Tue Aug 04 00:00:00 EDT 2009},
month = {Tue Aug 04 00:00:00 EDT 2009}
}