Event-shape-engineering study of charge separation in heavy-ion collisions

Abstract

Recent measurements of charge-dependent azimuthal correlations in high-energy heavy-ion collisions have indicated charge-separation signals perpendicular to the reaction plane, and have been related to the chiral magnetic effect (CME). However, the correlation signal is contaminated with the background caused by the collective motion (flow) of the collision system, and an effective approach is needed to remove the flow background from the correlation. We present a method study with simplified Monte Carlo simulations and a multi-phase transport model, and develop a scheme to reveal the true CME signal via the event-shape engineering with the flow vector of the particles of interest.

6 pages, 8 figures, to be published in Chinese Physics C

References in corpus (10)

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• Charge separation induced by P-odd bubbles in QCD matter
• Phobos results on charged particle multiplicity and pseudorapidity distributions in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultra-relativistic energies
• 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
• Effect of flow fluctuations and nonflow on elliptic flow methods
• Testing the Chiral Magnetic Effect with Central U+U collisions
• Evolution of transverse flow and effective temperatures in the parton phase from a multi-phase transport model
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Cited by in corpus (20)

• Anomalous Chiral Transport in Heavy Ion Collisions from Anomalous-Viscous Fluid Dynamics
• Chiral magnetic effect reveals the topology of gauge fields in heavy-ion collisions
• Experimental searches for the chiral magnetic effect in heavy-ion collisions
• Chiral Magnetic Effects in Nuclear Collisions
• Signatures of Chiral Magnetic Effect in the Collisions of Isobars
• On Mass correction to Chiral Vortical Effect and Chiral Separation Effect
• Implications of the isobar run results for chiral magnetic effect in heavy ion collisions
• Isolating the chiral magnetic effect from backgrounds by pair invariant mass
• Chiral Magnetic Effect in Heavy Ion Collisions: The Present and Future
• Search for the Chiral Magnetic Effect in Relativistic Heavy-Ion Collisions
• Axial Charge Fluctuation and Chiral Magnetic Effect from Stochastic Hydrodynamics
• Utilization of Event Shape in Search of the Chiral Magnetic Effect in Heavy-ion Collisions
• Pair invariant mass to isolate background in the search for the chiral magnetic effect in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$= 200 GeV
• Interpreting the charge-dependent flow and constraining the chiral magnetic wave with event shape engineering
• The Way Forward - Closing Remarks at Quark Matter 2017
• Event Shape Selection Method in Search of the Chiral Magnetic Effect in Heavy-ion Collisions
• Chiral Magnetic Effect in Isobaric Collisions from Anomalous-Viscous Fluid Dynamics (AVFD)
• Evolution of initial stage fluctuations in the glasma
• Search for the chiral magnetic effect through beam energy dependence of charge separation using event shape selection
• Topological charge fluctuations in the Glasma