Energy dependence of the chiral magnetic effect in expanding holographic plasma

Abstract

Based on a holographic far-from-equilibrium calculation of the chiral magnetic effect~(CME) in an expanding quark gluon plasma, we study collisions at various energies. We compute the time evolution of the CME current in the presence of a time-dependent axial charge density and subject to a time-dependent magnetic field. The plasma expansion leads to a dilution of the CME current. We study distinct combinations of how the initial magnetic field and initial axial charge behave with changing initial energy as proposed in previous literature. Most scenarios we consider lead to an increasing time-integrated CME current, when increasing the initial energy. This would make it more likely to observe the CME at higher collision energies.

18 pages, 6 figures, comments welcome

References in corpus (8)

• Horizon formation and far-from-equilibrium isotropization in supersymmetric Yang-Mills plasma
• Relativistic Hydrodynamics with General Anomalous Charges
• Beam-energy dependence of charge separation along the magnetic field in Au+Au collisions at RHIC
• Observation of charge-dependent azimuthal correlations in pPb collisions and its implication for the search for the chiral magnetic effect
• Strain induced Chiral Magnetic Effect in Weyl semimetals
• Holographic Anomalous Conductivities and the Chiral Magnetic Effect
• Chiral hydrodynamics in strong external magnetic fields
• Anomalous magnetohydrodynamics with longitudinal boost invariance and chiral magnetic effect