Unifying the landscape of nucleon structure: An infrared-safe evolution scheme
Year: 2024
Type: article
Abstract: A novel approach for describing the evolution of nucleon structure from low- Q 2 regime to high- Q 2 asymptotic region is proposed. This infrared-safe scheme modifies the parton distribution evolution equations to incorporate the corrections from emergent hadron mass mechanisms and parton-parton recombination at low Q 2 . The effective quark mass, generated by dynamical chiral symmetry breaking, slows the evolution of parton distributions in the infrared region, causing the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution to freeze when Q 2 ≪ M q / g . Notably, this scheme renders the high- Q 2 parton distributions insensitive to the choice of input hadronic scale. The parton-parton recombination effect is crucial in suppressing the rapid growth of parton distributions at small x , consistent with experimental data. When applied to three valence quark distributions derived from a quark model, our scheme yields parton distributions that agree well with deep-inelastic scattering data in both large- x and small- x regions, providing a unified description of nucleon structure across the entire Q 2 range. Published by the American Physical Society 2024
Authors: Rong Wang, Chengdong Han, Xurong Chen
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4404960878