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First measurement of the |t|-dependence of incoherent J/psi photonuclear production

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arxiv 2305.06169 v2 pith:EOD7X2RK submitted 2023-05-10 nucl-ex hep-ex

First measurement of the |t|-dependence of incoherent J/psi photonuclear production

classification nucl-ex hep-ex
keywords crossmeasurementmodelsdatadependencefirstfluctuationsincoherent
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The first measurement of the cross section for incoherent photonuclear production of J/$\psi$ vector mesons as a function of the Mandelstam $|t|$ variable is presented. The measurement was carried out with the ALICE detector at midrapidity, $|y|<0.8$, using ultra-peripheral collisions of Pb nuclei at a centre-of-mass energy per nucleon pair of $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV. This rapidity interval corresponds to a Bjorken-$x$ range $(0.3-1.4)\times 10^{-3}$. Cross sections are given in five $|t|$ intervals in the range $0.04<|t|<1$ GeV$^2$ and compared to the predictions by different models. Models that ignore quantum fluctuations of the gluon density in the colliding hadron predict a $|t|$-dependence of the cross section much steeper than in data. The inclusion of such fluctuations in the same models provides a better description of the data.

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Cited by 2 Pith papers

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

  1. Femtoscopy-driven searches for saturated gluonic matter in inclusive photonuclear processes

    hep-ph 2026-06 unverdicted novelty 5.0

    Femtoscopy is presented as a method to isolate gluon saturation and nuclear shadowing effects via space-time structure in photonuclear collisions.

  2. Ultra-peripheral Collisions

    hep-ex 2026-07 conditional novelty 1.0

    Ultra-peripheral collisions of heavy ions are reviewed as the energy frontier for photon physics; the paper consolidates a decade of LHC/RHIC results and proposes no new measurement.