Speaker
Alberto Accardi
(Hampton U. and Jefferson Lab)
Description
We present results of a new next-to-leading order fit 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-Q2 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 Deuteron and 3He nuclei, and systematically include target mass and higher twist corrections to the g1 and g2 structure functions at low Q2. We also explore the effects of Q2 and W2 cuts in the data sets, and the potential impact of future data on the behavior of the spin-dependent parton distributions.
Author
Pedro Jimenez-Delgado
(Jefferson Lab)
Co-authors
Alberto Accardi
(Hampton U. and Jefferson Lab)
Wally Melnitchouk
(Jefferson Lab)
