Effect of intense magnetic fields on reduced-magnetohydrodynamics evolution in √sNN = 200 GeV Au + Au collisions

  • We investigate the effect of large magnetic fields on the (2 + 1)-dimensional reduced-magnetohydrodynamical expansion of hot and dense nuclear matter produced in √sNN = 200 GeV Au+Au collisions. For the sake of simplicity,we consider the casewhere themagnetic field points in the direction perpendicular to the reaction plane. We also consider this field to be external, with energy density parametrized as a two-dimensional Gaussian. The width of the Gaussian along the directions orthogonal to the beam axis varies with the centrality of the collision. The dependence of the magnetic field on proper time (τ ) for the case of zero electrical conductivity of the QGP is parametrized following Deng et al. [Phys. Rev. C 85, 044907 (2012)], and for finite electrical conductivity following Tuchin [Phys. Rev. C 88, 024911 (2013)].We solve the equations of motion of ideal hydrodynamics for such an external magnetic field. For collisions with nonzero impact parameter we observe considerable changes in the evolution of the momentum eccentricities of the fireball when comparing the case when the magnetic field decays in a conducting QGP medium and when no magnetic field is present. The elliptic-flow coefficient v2 of π− is shown to increase in the presence of an external magnetic field and the increment in v2 is found to depend on the evolution and the initial magnitude of the magnetic field.

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Author:Victor RoyORCiD, Shi PuORCiD, Luciano RezzollaORCiDGND, Dirk H. RischkeORCiDGND
Parent Title (English):Physical Review C
Place of publication:Woodbury, NY
Document Type:Article
Date of Publication (online):2017/11/30
Date of first Publication:2017/11/30
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2022/12/01
Tag:Collective flow; Magnetohydrodynamics; Quark-gluon plasma; Relativistic heavy-ion collisions
Issue:5, art. 054909
Article Number:054909
Page Number:11
First Page:1
Last Page:11
Institutes:Physik / Physik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Forschungscluster / ELEMENTS
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht