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Coherent photoproduction of rho⁰ vector mesons in ultra-peripheral Pb-Pb collisions at sqrt{s_(rm NN)} = 5.02 TeV

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arxiv 2002.10897 v2 pith:JFW77QGH submitted 2020-02-25 nucl-ex hep-ex

Coherent photoproduction of rho⁰ vector mesons in ultra-peripheral Pb-Pb collisions at sqrt{s_(rm NN)} = 5.02 TeV

classification nucl-ex hep-ex
keywords coherentcollisionscomparedcrossdifferentmesonspb-pbphotoproduction
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Cross sections for the coherent photoproduction of $\rho^{0}$ vector mesons in ultra-peripheral Pb-Pb collisions at $ \sqrt{s_{\mathrm{NN}}}= 5.02$ TeV are reported. The measurements, which rely on the $\pi^+\pi^-$ decay channel, are presented in three regions of rapidity covering the range $|y|<0.8$. For each rapidity interval, cross sections are shown for different nuclear-breakup classes defined according to the presence of neutrons measured in the zero-degree calorimeters. The results are compared with predictions based on different models of nuclear shadowing. Finally, the observation of a coherently produced resonance-like structure with a mass around 1.7 GeV/$c^2$ and a width of about 140 MeV/$c^2$ is reported and compared with similar observations from other experiments.

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Forward citations

Cited by 7 Pith papers

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    hep-ph 2025-09 unverdicted novelty 4.0

    Model predictions for coherent and incoherent rho and J/psi photoproduction cross sections in O-O and Ne-Ne ultraperipheral collisions, comparing Woods-Saxon and cluster-based nuclear shapes.

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