Pionic gluons from global QCD analysis of experimental and lattice data
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911086501953536 |
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| author | Good, William Barry, Patrick C. Lin, Huey-Wen Melnitchouk, W. NieMiera, Alex Sato, Nobuo |
| author_facet | Good, William Barry, Patrick C. Lin, Huey-Wen Melnitchouk, W. NieMiera, Alex Sato, Nobuo |
| contents | We perform the first global QCD analysis of parton distribution functions (PDFs) in the pion, with lattice-QCD data on gluonic pseudo--Ioffe-time distributions fitted simultaneously with experimental Drell-Yan and leading neutron electroproduction data. Inclusion of the lattice results with parametrized systematic corrections significantly reduces the uncertainties on the gluon PDF at parton momentum fractions $x \gtrsim 0.2$, revealing a higher gluon density in the pion at large $x$ than in the proton. The similar gluon momentum fractions in the pion and proton further suggests a relative suppression of the pion gluon density at small $x$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_22730 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Pionic gluons from global QCD analysis of experimental and lattice data Good, William Barry, Patrick C. Lin, Huey-Wen Melnitchouk, W. NieMiera, Alex Sato, Nobuo High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Theory We perform the first global QCD analysis of parton distribution functions (PDFs) in the pion, with lattice-QCD data on gluonic pseudo--Ioffe-time distributions fitted simultaneously with experimental Drell-Yan and leading neutron electroproduction data. Inclusion of the lattice results with parametrized systematic corrections significantly reduces the uncertainties on the gluon PDF at parton momentum fractions $x \gtrsim 0.2$, revealing a higher gluon density in the pion at large $x$ than in the proton. The similar gluon momentum fractions in the pion and proton further suggests a relative suppression of the pion gluon density at small $x$. |
| title | Pionic gluons from global QCD analysis of experimental and lattice data |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Theory |
| url | https://arxiv.org/abs/2507.22730 |