Slicing Pomerons in ultraperipheral collisions using forward neutrons from nuclear breakup

Alvioli, M.; Guzey, V.; Strikman, M.

doi:10.1103/PhysRevC.110.025205

Title: Slicing Pomerons in ultraperipheral collisions using forward neutrons from nuclear breakup

Journal Article · 14 August 2024 · Physical Review. C

DOI: https://doi.org/10.1103/PhysRevC.110.025205 · OSTI ID:2474460

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We argue that measurements of forward neutrons from nuclear breakup in inclusive high energy photon-nucleus ( $γ A$ ) 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 $γ Pb$ collisions at the Large Hadron Collider. 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. Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-93ER40771

OSTI ID:: 2474460

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 2 Vol. 110; ISSN PRVCAN; ISSN 2469-9985

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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