# Properties of structure functions from helicity components of light quarks and antiquarks in the statistical model

Bourrely, Claude (Aix-Marseille Université, Université de Toulon, CNRS, CPT, Marseille, France)

27 November 2018

Abstract: In the quantum statistical parton distribution approach proposed more than one decade ago to describe the parton structure, new properties are now understood; in particular the relation between quarks and antiquarks leads to very specific properties. The simultaneous treatment of unpolarized and polarized parton distribution functions (PDFs) allows a determination of thermodynamical potentials (the master parameters of the model) which drive their behavior and consequently the behavior of the structure functions. The existence of a possible relation between the gluon and a $q\overline{q}$ pair leads to define a toy model for the unpolarized and polarized gluons. In view of forthcoming experimental results in the large-$x$ region, specific predictions made by the model are presented.

Published in: Physical Review C 98 (2018)