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Magnetic field in expanding quark-gluon plasma

Evan Stewart and Kirill Tuchin

  • Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA

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Phys. Rev. C 97, 044906 – Published 16 April, 2018

DOI: https://doi.org/10.1103/PhysRevC.97.044906

Abstract

Intense electromagnetic fields are created in the quark-gluon plasma by the external ultrarelativistic valence charges. The time evolution and the strength of this field are strongly affected by the electrical conductivity of the plasma. Yet, it has recently been observed that the effect of the magnetic field on the plasma flow is small. We compute the effect of plasma flow on magnetic field and demonstrate that it is less than 10%. These observations indicate that the plasma hydrodynamics and the dynamics of electromagnetic field decouple. Thus, it is a very good approximation, on the one hand, to study QGP in the background electromagnetic field generated by external sources and, on the other hand, to investigate the dynamics of magnetic field in the background plasma. We also argue that the wake induced by the magnetic field in plasma is negligible.

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Phys. Rev. C 97, 044906– Published 16 April, 2018
  • Received 26 October 2017
Article part of CHORUS
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