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Pionic gluons from global QCD analysis of experimental and lattice data

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arxiv 2507.22730 v1 pith:PSRHK2ZX submitted 2025-07-30 hep-ph hep-exhep-latnucl-th

Pionic gluons from global QCD analysis of experimental and lattice data

William Good , Patrick C. Barry , Huey-Wen Lin , W. Melnitchouk , Alex NieMiera , Nobuo Sato This is my paper
classification hep-ph hep-exhep-latnucl-th
keywords gluonpiondataanalysisdensityexperimentalfractionsglobal
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

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 $x$.

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Cited by 4 Pith papers

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    hep-ph 2025-10 conditional novelty 6.0

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    hep-ph 2025-09 conditional novelty 6.0

    First flavor-dependent extraction of unpolarized quark TMDs in the pion, finding a wider transverse momentum tail for valence d quarks than for sea quarks, with large uncertainties.

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  4. Precision QCD with the Electron-Ion Collider

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