Systematic study of the Chiral Magnetic Effect with the AVFD model at LHC energies

Abstract

We present a systematic study of the correlators used experimentally to probe the Chiral Magnetic Effect (CME) using the Anomalous Viscous Fluid Dynamics (AVFD) model in Pb--Pb and Xe--Xe collisions at LHC energies. We find a parametrization that describes the dependence of these correlators on the value of the axial current density ($n_5/\mathrm{s}$), which dictates the CME signal, and on the parameter that governs the background in these measurements i.e., the percentage of local charge conservation (LCC) within an event. This allows to deduce the values of $n_5/\mathrm{s}$ and the LCC percentage that provide a quantitative description of the centrality dependence of the experimental measurements. We find that the results in Xe--Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44$~TeV are consistent with a background only scenario. On the other hand, the model needs a significant non-zero value of $n_5/\mathrm{s}$ to match the measurements in Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$~TeV.

10 pages, 10 figures

References in corpus (12)

• The Chiral Magnetic Effect
• The QCD equation of state with dynamical quarks
• Equation of state and QCD transition at finite temperature
• Charge separation induced by P-odd bubbles in QCD matter
• Triangular flow in hydrodynamics and transport theory
• Beam-energy dependence of charge separation along the magnetic field in Au+Au collisions at RHIC
• Charge conservation in RHIC and contributiuons to local parity violation observables
• Observation of charge-dependent azimuthal correlations in pPb collisions and its implication for the search for the chiral magnetic effect
• Eccentricity fluctuations and elliptic flow at RHIC
• Chiral magnetic effect reveals the topology of gauge fields in heavy-ion collisions
• Experimental searches for the chiral magnetic effect in heavy-ion collisions
• Measurement of the pseudorapidity and centrality dependence of the transverse energy density in PbPb collisions at sqrt(s[NN]) = 2.76 TeV

Cited by in corpus (9)

• The ALICE experiment: a journey through QCD
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• Implications of the isobar run results for chiral magnetic effect in heavy ion collisions
• Chiral Magnetic Effect in Heavy Ion Collisions: The Present and Future
• Global constraint on the magnitude of anomalous chiral effects in heavy-ion collisions
• Search for the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Xe-Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44$ TeV
• First measurement of prompt and non-prompt ${\mathrm{D}}^{\ast +}$ vector meson spin alignment in pp collisions at $\sqrt{s}=13$ TeV
• Accessing Topological Fluctuations of Gauge Fields with Chiral Magnetic Effect
• Optimal Observables for the Chiral Magnetic Effect from Machine Learning