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Simultaneous Determination of Fragmentation Functions and Test on Momentum Sum Rule

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arxiv 2401.02781 v2 pith:5RPUGGDT submitted 2024-01-05 hep-ph hep-exnucl-th

classification hep-phhep-exnucl-th
keywords fragmentationhadronschargedsimultaneousfunctionsgluonhadronlight
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We perform a simultaneous global analysis of hadron fragmentation functions (FFs) to various charged hadrons at next-to-leading order in QCD. The world data set includes results from electron-positron single-inclusive annihilation, semi-inclusive deep inelastic scattering, as well as proton-proton collisions including jet fragmentation measurements which lead to strong constraints on the gluon fragmentations. By carefully selecting hadron kinematics to ensure the validity of QCD factorization and the convergence of perturbative calculations, we achieve a satisfying best fit with $\chi^2/$d.o.f.$=0.90$, in the simultaneous extraction of FFs for light charged hadrons ($\pi^{\pm}$, $K^{\pm}$ and $p/\bar{p}$). The total momentum of $u$, $d$ quarks and gluon carried by light charged hadrons have been determined precisely. That urges future precision measurements on fragmentation to neutral hadrons, which are crucial for the test of fundamental sum rules in QCD fragmentation.

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Forward citations

Cited by 6 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. Unbiased Data-Driven Determination of the Nuclear Dipole Amplitude in the Color Glass Condensate

    hep-ph 2026-07 conditional novelty 6.0 of 10

    The 208Pb dipole amplitude is learned from R_pPb and coherent J/ψ photoproduction data with the BK equation embedded in training, giving Q²_s0(Pb)/Q²_s0(p) = 3.17 and an MV-type initial condition.

  3. 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.

  4. Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders

    hep-ph 2025-12 conditional novelty 6.0 of 10

    A dihadron fragmentation azimuthal asymmetry at e+e− colliders can probe light-quark Yukawa couplings linearly and separate y_u from y_d at the 10^-4 level.

  5. Factorization and Resummation for the Nearside Energy-Energy Correlators

    hep-ph 2025-07 conditional novelty 6.0 of 10

    A new all-order resummation formula in Fourier b_T-space for the nearside energy-energy correlator, derived from di-hadron fragmentation functions, matches fixed-order calculations and predicts a small-angle turnover.

  6. Twist-3 effects in fully inclusive jet production from $e^+e^-$ annihilation

    hep-ph 2026-07 conditional novelty 5.0 of 10

    Twist-3 corrections to e+e- -> hadron + inclusive jet are derived including weak interactions, yielding two azimuthal asymmetries that can expose the Collins fragmentation function at future colliders.

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