Charge-dependent flow induced by magnetic and electric fields in heavy ion collisions
Name
PhysRevC.98.055201.pdf
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2.28 MB
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Author(s)
Gürsoy, Umut
Kharzeev, Dmitri
Marcus, Eric
Rajagopal, Krishna
Shen, Chun
Date Issued
November 2018
Journal
Physical Review C
Publisher
American Physical Society
Citation
Gürsoy, Umut et al. "Charge-dependent flow induced by magnetic and electric fields in heavy ion collisions." Physical Review C 98, 5 (November 2018): 055201 © American Physical Society
Version
Final published version
Abstract
We investigate the charge-dependent flow induced by magnetic and electric fields in heavy-ion collisions. We simulate the evolution of the expanding cooling droplet of strongly coupled plasma hydrodynamically, using the iEBE-VISHNU framework, and add the magnetic and electric fields as well as the electric currents they generate in a perturbative fashion. We confirm the previously reported effect of the electromagnetically induced currents [Gursoy et al., Phys. Rev. C 89, 054905 (2014)PRVCAN0556-281310.1103/PhysRevC.89.054905], that is a charge-odd directed flow Δv₁ that is odd in rapidity, noting that it is induced by magnetic fields (à la Faraday and Lorentz) and by electric fields (the Coulomb field from the charged spectators). In addition, we find a charge-odd Δv₃ that is also odd in rapidity and that has a similar physical origin. We furthermore show that the electric field produced by the net charge density of the plasma drives rapidity-even charge-dependent contributions to the radial flow 〈p[subscript T]〉 and the elliptic flow Δv₂. Although their magnitudes are comparable to the charge-odd Δv₁ and Δv₃, they have a different physical origin, namely the Coulomb forces within the plasma.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevC.98.055201
