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Studies of gluon TMDs and their evolution using quarkonium-pair production at the LHC

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arxiv 1909.05769 v1 pith:LL2RCOOC submitted 2019-09-12 hep-ph hep-ex

Florent Scarpa , Daniël Boer , Miguel G. Echevarria , Jean-Philippe Lansberg , Cristian Pisano , Marc Schlegel This is my paper
classification hep-phhep-ex
keywords asymmetriesgluondataevolutionmeasurablepairspolarizationproduction
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

$J/\psi$- or $\Upsilon$-pair production at the LHC are promising processes to study the gluon transverse momentum distributions (TMDs) which remain very poorly known. In this article, we improve on previous results by including the TMD evolution in the computation of the observables such as the pair-transverse-momentum spectrum and asymmetries arising from the linear polarization of gluons inside unpolarized protons. We show that the azimuthal asymmetries generated by the gluon polarization are reduced compared to the tree level case but are still of measurable size (in the 5%-10% range). Such asymmetries should be measurable in the available data sets of $J/\psi$ pairs and in the future data sets of the high-luminosity LHC for $\Upsilon$ pairs.

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Cited by 5 Pith papers

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

  1. A first extraction of gluon TMDs from Higgs data at the LHC

    hep-ph 2026-05 unverdicted novelty 8.0 of 10

    First extraction of gluon TMDs from ATLAS and CMS Higgs q_T distributions at 8 and 13 TeV within TMD factorisation at N3LL accuracy.

  2. First constraints on the nonperturbative gluon Collins-Soper kernel

    hep-lat 2026-07 conditional novelty 7.0 of 10

    First lattice-QCD constraints on the nonperturbative gluon Collins-Soper kernel are obtained at near-physical pion mass with uNNLL LaMET matching on a single a=0.15 fm ensemble.

  3. Automated NRQCD and NRQED simulations of quarkonium and leptonium production with P-wave states and physical-mass effects

    hep-ph 2026-07 conditional novelty 6.0 of 10

    MadSONS extends MadGraph to automated LO NRQCD/NRQED event generation for arbitrary S- and P-wave bound states, with dual-number projectors and physical-mass reshuffling.

  4. 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.

  5. Double quarkonium production in hadronic collisions at fixed-target experiments

    hep-ph 2026-07 conditional novelty 5.0 of 10

    Analytical cross sections and Sivers asymmetry predictions are presented for double quarkonium production via quark-antiquark annihilation at fixed-target experiments, showing a 10-15% asymmetry at COMPASS and small n...

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