Generalized parton distributions of valence, sea, and gluon components of the proton
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866913047919984640 |
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| author | Liu, Yiping Xu, Siqi Mondal, Chandan Zhao, Xingbo Vary, James P. |
| author_facet | Liu, Yiping Xu, Siqi Mondal, Chandan Zhao, Xingbo Vary, James P. |
| contents | We compute the generalized parton distributions (GPDs) of valence quarks, sea quarks, and gluons in the proton using light-front wave functions obtained within the basis light-front quantization (BLFQ) framework, providing a realistic description of the nucleon at a low resolution scale. The wave functions are derived from a light-front QCD Hamiltonian without an explicit confining potential and include the three-quark, three-quark-gluon, and three-quark-quark-antiquark Fock sectors. For the first time within BLFQ, we evaluate quark GPDs at nonzero skewness in both the DGLAP and ERBL regions, while gluon GPDs are computed in the DGLAP region. The resulting GPDs exhibit qualitative features similar to, but smaller than the GUMP1.0 global extraction of GPDs based on experimental and lattice QCD data at next-to-leading order accuracy. We further compute the associated Compton form factors and obtain results consistent with the global analysis. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_18355 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Generalized parton distributions of valence, sea, and gluon components of the proton Liu, Yiping Xu, Siqi Mondal, Chandan Zhao, Xingbo Vary, James P. High Energy Physics - Phenomenology We compute the generalized parton distributions (GPDs) of valence quarks, sea quarks, and gluons in the proton using light-front wave functions obtained within the basis light-front quantization (BLFQ) framework, providing a realistic description of the nucleon at a low resolution scale. The wave functions are derived from a light-front QCD Hamiltonian without an explicit confining potential and include the three-quark, three-quark-gluon, and three-quark-quark-antiquark Fock sectors. For the first time within BLFQ, we evaluate quark GPDs at nonzero skewness in both the DGLAP and ERBL regions, while gluon GPDs are computed in the DGLAP region. The resulting GPDs exhibit qualitative features similar to, but smaller than the GUMP1.0 global extraction of GPDs based on experimental and lattice QCD data at next-to-leading order accuracy. We further compute the associated Compton form factors and obtain results consistent with the global analysis. |
| title | Generalized parton distributions of valence, sea, and gluon components of the proton |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.18355 |