Extraction of Pion Unpolarized Quark Generalized Parton Distribution from Charge Form Factors
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866908959758090240 |
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| author | Puhan, Satyajit Sharma, Shubham Kumar, Narinder Dahiya, Harleen |
| author_facet | Puhan, Satyajit Sharma, Shubham Kumar, Narinder Dahiya, Harleen |
| contents | Based on a global fit to experimental measurements of the pion electromagnetic form factor and parton distribution functions (PDFs), we report a data-driven determination of the unpolarized quark generalized parton distributions (GPDs) for the case of pion in the zero-skewness limit ($ξ= 0$). The form factor is parameterized using a flexible functional form constrained by data and embedded into a GPD framework constructed from collinear PDFs and a profile function encoding transverse dynamics. This approach provides a unified description of the pion's electromagnetic structure and its spatial parton distributions. We present the extracted pion GPDs and their impact-parameter-space interpretations, offering new insights into the internal structure of the lightest QCD bound state and providing essential input for future electron-ion collider studies via the Sullivan process, as well as for the exclusive $π^+$ electroproduction at the 12~GeV Jefferson Lab program, pion-induced exclusive measurements at COMPASS, proposed pion-beam experiments at AMBER, and phenomenological and lattice investigations of the structure of the meson. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_11116 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Extraction of Pion Unpolarized Quark Generalized Parton Distribution from Charge Form Factors Puhan, Satyajit Sharma, Shubham Kumar, Narinder Dahiya, Harleen High Energy Physics - Phenomenology Based on a global fit to experimental measurements of the pion electromagnetic form factor and parton distribution functions (PDFs), we report a data-driven determination of the unpolarized quark generalized parton distributions (GPDs) for the case of pion in the zero-skewness limit ($ξ= 0$). The form factor is parameterized using a flexible functional form constrained by data and embedded into a GPD framework constructed from collinear PDFs and a profile function encoding transverse dynamics. This approach provides a unified description of the pion's electromagnetic structure and its spatial parton distributions. We present the extracted pion GPDs and their impact-parameter-space interpretations, offering new insights into the internal structure of the lightest QCD bound state and providing essential input for future electron-ion collider studies via the Sullivan process, as well as for the exclusive $π^+$ electroproduction at the 12~GeV Jefferson Lab program, pion-induced exclusive measurements at COMPASS, proposed pion-beam experiments at AMBER, and phenomenological and lattice investigations of the structure of the meson. |
| title | Extraction of Pion Unpolarized Quark Generalized Parton Distribution from Charge Form Factors |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.11116 |