Impact of hadronic and nuclear corrections on global analysis of spin-dependent parton distributions
- Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
- Hampton University, Hampton, VA (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177; DE-SC0008791
- OSTI ID:
- 1126413
- Report Number(s):
- JLAB-THY-13-1810; DOE/OR/23177-2796; arXiv:1310.3734; TRN: US1400269
- Journal Information:
- Physical Review D, Vol. 89, Issue 03
- Country of Publication:
- United States
- Language:
- English
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