Final state effects on charge asymmetry of pion elliptic flow in high-energy heavy-ion collisions

Abstract

Within a multi-phase transport (AMPT) model with the string melting mechanism and imported initial electric quadrupole moment, the difference between the elliptic flow of positive and negative pions is calculated. The slope parameter $r$ of the linear dependence of $\Delta v_2=v_2({\pi }^{-})-v_2({\pi }^{+})$ on $A_{ch}=(N^{+}-N^{-})/(N^{+}+N^{-})$ is yielded owing to the parton cascade, which converts the initial electric quadrupole distribution into the final charge-dependent elliptic flow. The slope parameter $r$ is found to be increased by the hadronization given by the coalescence, and decreased by the resonance decays. The slope parameter $r$ is very sensitive to both the initial electric quadrupole percentage and centrality bin and consequently a helpful constraint on the quadrupole moment of the chiral magnetic wave is obtained for Au+Au collisions at the top RHIC energy.

4 pages, 4 figures, 1 table, final published version

References in corpus (7)

• Charge separation induced by P-odd bubbles in QCD matter
• The Chiral Magnetic Effect and Anomaly-Induced Transport
• Chiral Magnetic Wave
• Quantum Anomalies in Dense Matter
• Charm elliptic flow at RHIC
• Anomalous transport effects and possible environmental symmetry "violation" in heavy ion collisions
• Realistic Implementation of Chiral Magnetic Wave in Heavy Ion Collisions

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• Global constraint on the magnitude of anomalous chiral effects in heavy-ion collisions
• Possible observables for the chiral electric separation effect in Cu + Au collisions
• Interpreting the charge-dependent flow and constraining the chiral magnetic wave with event shape engineering
• Charge-dependent transverse momentum and its impact on the search for the chiral magnetic wave
• Charge asymmetry dependence of flow and a novel correlator to detect the chiral magnetic wave in a multiphase transport model
• Recent developments in chiral and spin polarization effects in heavy-ion collisions
• Probing the Chiral Magnetic Wave with charge-dependent flow measurements in Pb-Pb collisions at the LHC
• An extended $R_{{\Psi }_m}^{(2)}(\Delta S_2)$ correlator for detecting and characterizing the Chiral Magnetic Wave
• Dynamical Electromagnetic fields and Dynamical Electromagnetic Anomaly in heavy ion collisions at intermediate energies
• Applying Deep Learning Technique to Chiral Magnetic Wave Search
• Electromagnetic anomaly in the presence of electric and chiral magnetic conductivities in relativistic heavy-ion collisions