Constraining the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 and 5.02 TeV

Abstract

Systematic studies of charge-dependent two- and three-particle correlations in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 2.76 and 5.02 TeV used to probe the Chiral Magnetic Effect (CME) are presented. These measurements are performed for charged particles in the pseudorapidity ($\eta$) and transverse momentum ($p_{\mathrm{T}}$) ranges $\left|\eta \right|<0.8$ and $0.2<p_{\mathrm{T}}<5$ GeV/$c$. A significant charge-dependent signal that becomes more pronounced for peripheral collisions is reported for the CME-sensitive correlators ${\gamma }_{1,1}=⟨\cos ({\phi }_{\alpha }+{\phi }_{\beta }-2{\Psi }_2)⟩$ and ${\gamma }_{1,-3}=⟨\cos ({\phi }_{\alpha }-3{\phi }_{\beta }+2{\Psi }_2)⟩$. The results are used to estimate the contribution of background effects, associated with local charge conservation coupled to anisotropic flow modulations, to measurements of the CME. A blast-wave parametrisation that incorporates local charge conservation tuned to reproduce the centrality dependent background effects is not able to fully describe the measured ${\gamma }_{1,1}$. Finally, the charge and centrality dependence of mixed-harmonics three-particle correlations, of the form ${\gamma }_{1,2}=⟨\cos ({\phi }_{\alpha }+2{\phi }_{\beta }-3{\Psi }_3)⟩$, which are insensitive to the CME signal, verify again that background contributions dominate the measurement of ${\gamma }_{1,1}$.

arXiv comment29 pages, 8 captioned figures, 4 tables, authors from page 24, published version, figures at http://alice-publications.web.cern.ch/node/6296

References in corpus (54)

• The Chiral Magnetic Effect
• The effects of topological charge change in heavy ion collisions: "Event by event P and CP violation"
• A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
• Methods for analyzing anisotropic flow in relativistic nuclear collisions
• Observation of the chiral magnetic effect in ZrTe5
• The QCD equation of state with dynamical quarks
• Flow Study in Relativistic Nuclear Collisions by Fourier Expansion of Azimuthal Particle Distributions
• Performance of the ALICE Experiment at the CERN LHC
• Elliptic flow of charged particles in Pb-Pb collisions at 2.76 TeV
• Collision geometry fluctuations and triangular flow in heavy-ion collisions
• The ALICE TPC, a large 3-dimensional tracking device with fast readout for ultra-high multiplicity events
• Charge separation induced by P-odd bubbles in QCD matter
• Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation
• The Chiral Magnetic Effect and Anomaly-Induced Transport
• Event-by-event fluctuations of magnetic and electric fields in heavy ion collisions
• ZPC 1.0.1: a parton cascade for ultrarelativistic heavy ion collisions
• Centrality determination of Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV with ALICE
• The QCD phase transition with physical-mass, chiral quarks
• Performance of the ALICE VZERO system
• Possibility of spontaneous parity violation in hot QCD
• Parity violation in hot QCD: how to detect it
• Triangular flow in hydrodynamics and transport theory
• Observation of charge-dependent azimuthal correlations and possible local strong parity violation in heavy ion collisions
• Observable implications of geometrical and dynamical aspects of freeze-out in heavy ion collisions
• A Multi-Phase Transport model for nuclear collisions at RHIC
• The Importance of Correlations and Fluctuations on the Initial Source Eccentricity in High-Energy Nucleus-Nucleus Collisions
• Charge separation relative to the reaction plane in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Signatures of Quark-Gluon-Plasma formation in high energy heavy-ion collisions: A critical review
• Production of charged pions, kaons and (anti-)protons in Pb-Pb and inelastic pp collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• 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
• Elliptic flow in the Gaussian model of eccentricity fluctuations
• Measurement of event-plane correlations in sqrt(s_NN)=2.76 TeV lead-lead collisions with the ATLAS detector
• Ultra-relativistic nuclear collisions: event shape engineering
• Observation of charge-dependent azimuthal correlations in pPb collisions and its implication for the search for the chiral magnetic effect
• Charged particle rapidity distributions at RHIC
• Eccentricity fluctuations and elliptic flow at RHIC
• Charge-dependent Flow Induced by Magnetic and Electric Fields in Heavy Ion Collisions
• Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in pPb and PbPb collisions at the LHC
• Effects of Momentum Conservation and Flow on Angular Correlations at RHIC
• Pionic Measures of Parity and CP Violation in High Energy Nuclear Collisions
• Energy dependence and fluctuations of anisotropic flow in Pb-Pb collisions at $\sqrt{{\text{s}}_{\text{NN}}}=5.02$ and $2.76$ TeV
• Charge-Dependent Correlations in Relativistic Heavy Ion Collisions and the Chiral Magnetic Effect
• Measurement of Charge Multiplicity Asymmetry Correlations in High Energy Nucleus-Nucleus Collisions at 200 GeV
• Constraining the magnitude of the Chiral Magnetic Effect with Event Shape Engineering in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76$ TeV
• System size, energy and pseudorapidity dependence of directed and elliptic flow at RHIC
• Anisotropic flow of identified particles in Pb-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}=5.02$ TeV
• Charge correlations using the balance function in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Systematic Errors: facts and fictions
• Multiplicity and transverse momentum evolution of charge-dependent correlations in pp, p-Pb, and Pb-Pb collisions at the LHC
• Charge-dependent pair correlations relative to a third particle in $p$+Au and $d$+Au collisions at RHIC
• Collective phenomena in ultra-relativistic nuclear collisions: anisotropic flow and more
• Fluctuations of charge separation perpendicular to the event plane and local parity violation in sqrt(sNN)=200 GeV Au+Au collisions at RHIC
• Background evaluations for the chiral magnetic effect with normalized correlators using a multiphase transport model

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• The ALICE experiment: a journey through QCD
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• Properties of the QCD Matter: A Review of Selected Results from the ALICE Experiment
• Two- and three-particle nonflow contributions to the chiral magnetic effect measurement by spectator and participant planes in relativistic heavy ion collisions
• Energy dependence of the chiral magnetic effect in expanding holographic plasma
• Charge diffusion in relativistic resistive second-order dissipative magnetohydrodynamics
• Multi-harmonic correlations of different flow amplitudes in Pb-Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=2.76$ TeV
• Global constraint on the magnitude of anomalous chiral effects in heavy-ion collisions
• Interpreting the charge-dependent flow and constraining the chiral magnetic wave with event shape engineering
• Systematic study of the Chiral Magnetic Effect with the AVFD model at LHC energies
• Upper Limit on the Chiral Magnetic Effect in Isobar Collisions at the Relativistic Heavy-Ion Collider
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• Event-by-event correlations between $\Lambda$ ($\bar{\Lambda }$) hyperon global polarization and handedness with charged hadron azimuthal separation in Au+Au collisions at $\sqrt{s_{\text{NN}}}=27\text{ GeV}$ from STAR
• Jet-like correlations with respect to K${}_{\mathrm{S}}^0$ and $\Lambda$ ($\bar{\Lambda }$) in pp and central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Investigating event-shape methods in the search for the chiral magnetic effect in relativistic heavy ion collisions
• Manipulating strong electromagnetic fields with the average transverse momentum of relativistic nuclear collisions
• Turning up and down strong magnetic fields in relativistic nuclear collisions
• Investigation of Experimental Observables in Search of the Chiral Magnetic Effect in Heavy-ion Collisions in the STAR experiment
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