skip to main content

SciTech ConnectSciTech Connect

Title: Impact of hadronic and nuclear corrections on global analysis of spin-dependent parton distributions

We present the first results of a new global next-to-leading order analysis of spin-dependent parton distribution functions from the most recent world data on inclusive polarized deep-inelastic scattering, focusing in particular on the large-x and low-Q^2 regions. By directly fitting polarization asymmetries we eliminate biases introduced by using polarized structure function data extracted under nonuniform assumptions for the unpolarized structure functions. For analysis of the large-x data we implement nuclear smearing corrections for deuterium and 3He nuclei, and systematically include target mass and higher twist corrections to the g_1 and g_2 structure functions at low Q^2. We also explore the effects of Q^2 and W^2 cuts in the data sets, and the potential impact of future data on the behavior of the spin-dependent parton distributions at large x.
Authors:
 [1] ;  [2] ;  [1]
  1. Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
  2. Hampton University, Hampton, VA (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Publication Date:
OSTI Identifier:
1126413
Report Number(s):
JLAB-THY--13-1810; DOE/OR/23177-2796; arXiv:1310.3734
TRN: US1400269
DOE Contract Number:
AC05-06OR23177; DE-SC0008791
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review D; Journal Volume: 89; Journal Issue: 03
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC) (United States)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS