Small- and large-x nucleon spin structure from a global QCD analysis of polarized Parton Distribution Functions

Understand

I investigate the behavior of spin-dependent parton distribution functions in the regions of small and large momentum fractions $x$.

• I present a systematic comparison between predictions for relevant observables obtained with various models of nucleon spin structure and a recent global analysis of spin-dependent distributions, NNPDFpol1.1.
• Together with its unpolarized counterpart, NNPDF2.3, they form a mutually consistent set of parton distributions.
• Because they include most of the available experimental information, and are determined with a minimally biased methodology, these are especially suited for such a study.