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Slicing Pomerons in ultraperipheral collisions using forward neutrons from nuclear breakup

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arxiv 2402.19060 v2 pith:UCXBMPQU submitted 2024-02-29 hep-ph hep-exnucl-ex

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

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abstract

We argue that measurements of forward neutrons from nuclear breakup in inclusive high energy photon-nucleus ($\gamma A$) scattering provide a novel way to study small-$x$ dynamics of QCD in heavy-ion ultraperipheral collisions (UPCs). Using models for hadronic fluctuations of the real photon and neutron emission in nuclear fragmentation, we calculate the distribution over the number of evaporation neutrons produced in $\gamma Pb$ collisions at the LHC. We show that it is correlated with the number of wounded nucleons (inelastic collisions) and, hence, can constrain the mechanism of nuclear shadowing and its $x$ dependence.

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Cited by 1 Pith paper

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

  1. Hard-jet correlations in large and small systems

    nucl-ex 2025-05 unverdicted

    This paper is a conference proceeding that reviews recent hard-jet correlation measurements in large and small collision systems; it contains no new experimental data, analysis, or derivation.

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