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Polarized TMD fragmentation functions for $J/\psi$ production

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arxiv 2308.08605 v3 pith:KJTMFPFD submitted 2023-08-16 hep-ph

Marston Copeland , Sean Fleming , Rohit Gupta , Reed Hodges , Thomas Mehen This is my paper · ORCID
classification hep-ph
keywords polarizedproductionfragmentationnrqcdtmdffscontributionfunctionslight
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We calculate the matching, at leading order, of the transverse momentum-dependent fragmentation functions (TMDFFs) for light quarks and gluons fragmenting to a $J/\psi$ onto polarized nonrelativistic QCD (NRQCD) TMDFFs. The NRQCD TMDFFs have an operator-product-expansion in terms of nonperturbative NRQCD production matrix elements. Using the results we obtain, we make predictions for the light quark fragmentation contribution to the production of polarized $J/\psi$ in semi-inclusive deep inelastic scattering (SIDIS) both for unpolarized and longitudinally polarized beams. These results are an important contribution to polarized $J/\psi$ production in SIDIS, and thus are needed for comparison with experiments at the future Electron-Ion Collider.

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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. Measurement of the fragmentation properties of jets containing $\Upsilon$(nS) mesons in proton-proton collisions at $\sqrt{s}$ = 13 TeV

    hep-ex 2026-07 conditional novelty 6.0 of 10

    First measurement of Upsilon(nS) jet-fragmentation profiles shows data have lower z and higher p_rel^T than PYTHIA 8.240/8.310 with CP1/CP5 tunes.

  2. The role of the soft scale for $J/\psi$ production in the transverse momentum dependent framework

    hep-ph 2025-09 conditional novelty 6.0 of 10

    The paper derives new TMD soft transition functions and shows they dominate J/psi production at small transverse momentum by a factor of 1/v over previously used shape functions.

  3. $\psi(2S)$ production in jets using NRQCD

    hep-ph 2025-08 conditional novelty 6.0 of 10

    Applying NRQCD fragmenting jet functions and gluon-fragmentation-improved Pythia to psi(2S) in jets, the authors find that the LHCb data favor the Bodwin et al. LDME set and expose large tensions with other extractions.

  4. QED nuclear medium effects at EIC energies

    nucl-th 2025-02 conditional novelty 5.0 of 10

    QED interactions between electrons and the screened Coulomb field of a lead nucleus produce percent-level corrections to elastic and inclusive deep-inelastic scattering rates at EIC energies.

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