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Fragmentation Functions of Charged Hadrons at Next-to-Next-to-Leading Order and Constraints on the Proton Parton Distribution Functions

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arxiv 2502.17837 v2 pith:JCUNLRF5 submitted 2025-02-25 hep-ph hep-ex

classification hep-phhep-ex
keywords datafunctionspdfsasymmetrychargeddistributionfragmentationglobal
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present the first global analysis of fragmentation functions (FFs) for light charged hadrons ($\pi^{\pm}$, $K^{\pm}$) at full next-to-next-to-leading order in Quantum Chromodynamics (QCD), incorporating world data from both single-inclusive electron-positron annihilation and semi-inclusive deep-inelastic scattering. The collinear factorization has been tested with low-momentum-transfer data and has demonstrated success at high hadron momenta. Additionally, we study the impact of current global data on hadron production to the parton distribution functions (PDFs), and find they favor a reduced asymmetry in the strange (anti-) quark PDFs, as compared to the asymmetry predicted by state-of-the-art PDFs derived from inclusive data.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Next-to-next-to-leading-order QCD corrections to ${}^3S_1^{(8)}$ gluon fragmentation function for quarkonium

    hep-ph 2026-06 unverdicted novelty 8.0 of 10

    First NNLO QCD short-distance coefficients for the ³S₁⁽⁸⁾ gluon fragmentation function are obtained numerically to high precision, with analytic endpoint logarithms reconstructed for threshold resummation.

  2. Dihadron Angular Correlations in the $e^+e^-$ Collision

    hep-ph 2025-06 conditional novelty 7.0 of 10

    The paper derives the first complete O(alpha_s^2) analytic QCD corrections to the dihadron angular separation distribution in e+e- annihilation, with verified cancellation of infrared poles.

  3. Benchmarking the Nearside Energy-Energy Correlators with Mellin Transform

    hep-ph 2026-07 conditional novelty 6.0 of 10

    A Mellin-transform framework with one fitted transition scale Λ describes nearside EECs in e+e− annihilation at NNLO+NNLL accuracy across ALEPH and earlier data.

  4. Precise QCD Predictions for Hadron-in-jet Production in $e^+e^-$ Collisions

    hep-ph 2026-02 conditional novelty 6.0 of 10

    First NNLO QCD predictions for hadron-in-jet cross sections in e+e- two- and three-jet events, with ALEPH comparisons showing improved convergence when the fragmentation scale is set by the jet resolution.

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