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Neutron-skin effect in direct-photon and charged hadron-production in Pb+Pb collisions at the LHC

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arxiv 1606.06910 v2 pith:BHRQZULM submitted 2016-06-22 hep-ph nucl-th

classification hep-phnucl-th
keywords distributioneffectneutron-skinchargedcollisionsdependencedirect-photoneffects
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

A well-established observation in nuclear physics is that in neutron-rich spherical nuclei the distribution of neutrons extends farther than the distribution of protons. In this work, we scrutinize the influence of this so called neutron-skin effect on the centrality dependence of high-$p_{\rm T}$ direct-photon and charged-hadron production. We find that due to the estimated spatial dependence of the nuclear parton distribution functions, it will be demanding to unambiguously expose the neutron-skin effect with direct photons. However, when taking a ratio between the cross sections for negatively and positively charged high-$p_{\rm T}$ hadrons, even centrality-dependent nuclear-PDF effects cancel, making this observable a better handle on the neutron skin. Up to 20~\% effects can be expected for the most peripheral collisions.

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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. Unraveling the neutron skin thickness through jet charge in deep inelastic scattering

    hep-ph 2025-06 conditional novelty 6.0 of 10

    Jet charge distributions in electron-ion collisions are shown to be sensitive to neutron skin thickness, with peripheral collisions suppressing positive jets and enhancing negative jets.

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