Symmetry breaking effect on determination of polarized and unpolarized parton distributions

TL;DR

This paper presents a new extraction of polarized and unpolarized parton distribution functions considering flavor symmetry breaking, utilizing recent DIS and SIDIS data within the FFNS framework to improve the understanding of quark and antiquark densities.

Contribution

It introduces a novel approach to flavor decomposition in parton distributions, explicitly accounting for symmetry breaking and heavy flavor contributions in the analysis.

Findings

Separated light quark and antiquark densities are obtained.

New parametrization forms for quark distributions are proposed.

Heavy flavor contributions are included in the unpolarized distributions.

Abstract

We perform a new extraction for unpolarized and polarized parton distribution functions considering a flavor decompositions for sea quarks and applying very recent deep inelastic scattering (DIS) and semi inclusive deep inelastic scattering (SIDIS) data in the fixed flavor number scheme (FFNS) framework. In the new symmetry breaking scenario the light quark and antiquark densities are extracted separately and new parametrization forms are determined for them. The heavy flavors contribution, including charm and bottom quarks, are also taken to be account for unpolarized distributions.