Three Dimensional Structure of Pion with One Dynamical Gluon in the Light-Cone Quark Model
- Authors
- S. Puhan, S. Sharma, N. Kumar
- Published
- e-Print: 2611.13805 [hep-ph]
- Date
- 10 November, 2026
We study the three-dimensional structure of the pion beyond the leading Fock state by including a dynamical gluon, |π⟩=|qq̄⟩+|qq̄ g⟩.
What we found
After NLO evolution, we compare the PDFs with pion-induced Drell--Yan, J/ψ, Υ, and HERA leading-neutron F₂^π data. The qq̄ g sector contributes little to Drell--Yan but becomes important for gluon-sensitive observables such as J/ψ production and the pion structure function at small x
Authors: S. Puhan, S. Sharma, N. Kumar
Published in: e-Print: 2611.13805 [hep-ph]
arXiv:2611.13805 · INSPIRE-HEP record
Abstract
We study the three-dimensional structure of the pion beyond the leading Fock state by including a dynamical gluon, |π⟩=|qq̄⟩+|qq̄ g⟩. Within the light-cone quark model, we calculate the pion GPDs, TMDs, and PDFs from light-front wave function overlaps, using a modified Brodsky--Huang--Lepage wave function with the Melosh--Wigner rotation for the valence sector and the light-front quark--gluon vertex for the qq̄ g sector. The quark-number and momentum sum rules are satisfied without additional constraints. We further obtain the electromagnetic form factor and the mass decomposition. After NLO evolution, we compare the PDFs with pion-induced Drell--Yan, J/ψ, Υ, and HERA leading-neutron F₂^π data. The qq̄ g sector contributes little to Drell--Yan but becomes important for gluon-sensitive observables such as J/ψ production and the pion structure function at small x