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Charge-dependent directed flows in heavy-ion collisions by Boltzmann-Maxwell equations
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abstract
We have calculated the directed flow $v_{1}$ and charge-dependent directed flow $\Delta v_{1}$ for pions and protons in Au+Au collisions at $\sqrt{s_{NN}}=200$GeV by solving the coupled Boltzmann-Maxwell equations self-consistently. Our numerical results show that $v_{1}$ for pions and protons are all negative in the positive mid rapidity region and have similar behavior and magnitude. In contrast we find a quite different behavior in $\Delta v_{1}$ for pions and protons. The difference lies in that $\Delta v_{1}$ for protons mainly comes from pressure gradients of the medium, while the dominant contribution to $\Delta v_{1}$ for pions is from electromagnetic fields. Our results indicate that the effect of the electric field will slightly exceed that of the magnetic and lead to a small negative slope of $\Delta v_{1}$ for pions
Forward citations
Cited by 2 Pith papers
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The Gilbert Damping Factor of Heavy Quark Spin Polarization in the Magnetic Field
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Dynamical Electromagnetic fields and Dynamical Electromagnetic Anomaly in heavy ion collisions at intermediate energies
A UrQMD-based Maxwell simulation at intermediate collision energies finds longer-lived energy-weighted electromagnetic fields and an E·B anomaly whose centrality trend resembles the measured slope parameter r.
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