Coherent photoproduction of ${\rho }^0$ vector mesons in ultra-peripheral Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV

Abstract

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.

24 pages, 5 captioned figures, 4 tables, authors from page 19, published version, figures at http://alice-publications.web.cern.ch/node/6147

References in corpus (29)

• Performance of the ALICE Experiment at the CERN LHC
• The ALICE TPC, a large 3-dimensional tracking device with fast readout for ultra-high multiplicity events
• The Physics of Ultraperipheral Collisions at the LHC
• Saturation and BFKL dynamics in the HERA data at small x
• Performance of the ALICE VZERO system
• Exclusive Vector Meson Production in Relativistic Heavy Ion Collisions
• Alignment of the ALICE Inner Tracking System with cosmic-ray tracks
• STARlight: A Monte Carlo simulation program for ultra-peripheral collisions of relativistic ions
• LHC Forward Physics
• Coherent rho^0 Production in Ultra-Peripheral Heavy Ion Collisions
• Coherent Vector Meson Photoproduction with Nuclear Breakup in Relativistic Heavy Ion Collisions
• A simple model for nuclear structure functions at small $x$ in the dipole picture
• Measurement of the cross section for electromagnetic dissociation with neutron emission in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Energy dependence of dissociative $J/\psi$ photoproduction as a signature of gluon saturation at the LHC
• Elastic and Proton-Dissociative rho0 Photoproduction at HERA
• Coherent photoproduction of vector mesons in heavy ion ultraperipheral collisions: Update for run 2 at the CERN Large Hadron Collider
• Mutual heavy ion dissociation in peripheral collisions at ultrarelativistic energies
• Coherent diffractive photoproduction of ${\rho }^0$ mesons on gold nuclei at RHIC
• Color dipole predictions for the exclusive vector meson photoproduction in $pp/pPb/PbPb$ collisions at Run 2 LHC energies
• Signals for black body limit in coherent ultraperipheral heavy ion collisions
• Disentangling coherent and incoherent quasielastic $J/\psi$ photoproduction on nuclei by neutron tagging in ultraperipheral ion collisions at the LHC
• Coherent ${\rho }^0$ photoproduction in ultra-peripheral Pb-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}=2.76$ TeV
• Measurement of exclusive ${\rho }^0$(770) photoproduction in ultraperipheral pPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• A generator of forward neutrons for ultra-peripheral collisions: $\textbf{n$\mathbf{_O^O}$n}$
• Nuclear shadowing in photoproduction of $\rho$ mesons in ultraperipheral nucleus collisions at RHIC and the LHC
• Mass dependence of vector meson photoproduction off protons and nuclei within the energy-dependent hot-spot model
• Particle emission following Coulomb excitation in ultrarelativistic heavy-ion collisions
• ${\rho }^0$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR
• On the performance of Zero Degree Calorimeters in detecting multinucleon events

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• Coulomb nuclear interference effect in dipion production in ultraperipheral heavy ion collisions
• Observation of strong nuclear suppression in exclusive $J/\psi$ photoproduction in Au$+$Au ultra-peripheral collisions at RHIC
• Challenges to the Good-Walker paradigm in coherent and incoherent photoproduction
• Exclusive $J/\psi$, $\psi (2s)$, and $e^{+}{e}^{-}$ pair production in Au$+$Au ultra-peripheral collisions at RHIC
• Novel Cross Section Ratios as Possible Signals of Saturation in UPCs
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• Exclusive quarkonium photoproduction: predictions with the Balitsky-Kovchegov equation including the full impact-parameter dependence
• Incoherent $\rho$ meson photoproduction in ultraperipheral nuclear collisions at the LHC
• Nuclear deformation effects in photoproduction of $\rho$ mesons in ultraperipheral isobaric collisions
• Observation of coherent $\varphi$(1020) meson photoproduction in ultraperipheral PbPb collisions at $\sqrt{s_{\text{NN}}}$ = 5.36 TeV
• Diffractive vector meson photo-production in oxygen-oxygen and neon-neon ultraperipheral collisions at energies available at the CERN Large Hadron Collider
• Rescattering effects on spin-interference for ${\rho }^0$ photoproduction in heavy-ion collisions