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Constraints on spin-dependent parton distributions at large x from global QCD analysis
- Source :
- Physics Letters B, Vol 738, Iss , Pp 263-267 (2014)
- Publication Year :
- 2014
- Publisher :
- Elsevier, 2014.
-
Abstract
- We investigate the behavior of spin-dependent parton distribution functions (PDFs) at large parton momentum fractions x in the context of global QCD analysis. We explore the constraints from existing deep-inelastic scattering data, and from theoretical expectations for the leading x→1 behavior based on hard gluon exchange in perturbative QCD. Systematic uncertainties from the dependence of the PDFs on the choice of parametrization are studied by considering functional forms motivated by orbital angular momentum arguments. Finally, we quantify the reduction in the PDF uncertainties that may be expected from future high-x data from Jefferson Lab at 12 GeV.
Details
- Language :
- English
- ISSN :
- 03702693
- Volume :
- 738
- Issue :
- 263-267
- Database :
- Directory of Open Access Journals
- Journal :
- Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.0ee90a25a72344809ff3475edb07283b
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.physletb.2014.09.049