2025-06-19 中国科学院(CAS)
A relationship diagram of hadron structure models. (Image from J. Phys. G: Nucl. Part. Phys. 48 (2021) 075106)
＜関連情報＞
- https://english.cas.cn/newsroom/research_news/phys/202506/t20250620_1045894.shtml
- https://journals.aps.org/prd/abstract/10.1103/3z39-l1kg
パイ中間子分布関数へのグルオンの寄与 Gluonic contributions to the pion parton distribution functions
Jiangshan Lan, Chandan Mondal, Xingbo Zhao, Tobias Frederico, and James P. Vary
Physical Review D Published: 16 June, 2025
DOI: https://doi.org/10.1103/3z39-l1kg
Abstract
We investigate gluonic contributions to the pion beyond the valence sector using basis light-front quantization (BLFQ) and the Minkowski Bethe-Salpeter equation (BSE). Starting from the valence light-front wave function, we construct the quark-antiquark-gluon component and derive the corresponding quark and gluon parton distribution functions (PDFs). A proposed operator generating this higher Fock sector is validated against BLFQ and BSE results. We identify dynamical chiral symmetry breaking through enhanced spin-flip transitions, which amplify the low- quark PDF and underlie the − mass splitting. The framework also reveals the impact of a vanishing gluon mass on the gluon PDF, highlighting sensitivity to nonperturbative gluon dynamics.
