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arXiv · 2502.04611

Investigating effects of the electrical conductivity of QCD matter on charge-dependent directed flow

Nicholas J. Benoit·Takahiro Miyoshi·Chiho Nonaka·Hiroyuki R. Takahashi
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Abstract

Charge dependent directed flow is an important observable of electromagnetic fields in relativistic heavy-ion collisions. We demonstrate how the difference in charge dependent directed flows between protons and antiprotons is sensitive to the resistivity, inverse of quark-gluon plasma's electric conductivity, over different collision centralities. Our model numerically solves the 3+1D relativistic resistive magneto-hydrodynamic (RRMHD) equations, assuming the electric conductivity to be a scalar. For this work, we focus on symmetric Au + Au collisions at the top RHIC energy of $\sqrt{s}=200$ GeV. We illustrate the time evolution of the electromagnetic fields in our model and connect that to the charge dependent directed flow results. Our results highlight the importance of modeling quark-gluon plasma's electric conductivity for charge dependent observables in relativistic heavy-ion collisions.

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Nicholas J. Benoit, Takahiro Miyoshi, Chiho Nonaka, Hiroyuki R. Takahashi. 2025-02-07. Investigating effects of the electrical conductivity of QCD matter on charge-dependent directed flow. https://arxiv.org/abs/2502.04611

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