Journal Article

GSI-2026-00342

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of electromagnetic fields on the generation of the directed and elliptic flows of heavy quarks in relativistic heavy-ion collisions

Das, S. K. (Corresponding author) ; Soloveva, O.GSI* ; Song, T.GSI* ; Bratkovskaya, E.GSI*

2025
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/yppc-ts4n  doi:10.15120/GSI-2026-00342

Report No.: arXiv:2507.22620

Abstract: We study the impact of self-generated electromagnetic fields (EMF) on the momentum evolution of charm quarks in the partonic and hadronic medium created in heavy-ion collisions at energies available at the Relativistic Heavy Ion Collier (RHIC), using the parton-hadron-string dynamics (PHSD) off-shell transport approach. In the quark-gluon plasma (QGP) phase, the charm quark interacts with the off-shell partons, whose mass and widths are given by the dynamical quasiparticle model (DQPM), which can reproduce the lattice QCD thermodynamics. The background electromagnetic fields are computed dynamically within the PHSD considering both the spectators and participants protons as well as newly produced charged hadrons, quarks, and antiquarks, which reflects naturally the electric conductivity sigma el of the medium. We study the directed and elliptic flow of D mesons in the presence of electromagnetic fields. We find that electromagnetically induced v1 splitting in the D meson through D0 and D0 mesons is consistent with the experimental data. Furthermore, we notice that the v1 splitting in the heavy quark as a function of pT is more prominent as a probe of the produced electromagnetic fields. However, we find only a small impact of electromagnetic fields on the heavy quark elliptic flow v2.

Note: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license.

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Contributing Institute(s):

1. Heiße & Dichte QCD Materie (TES)
2. Helmholtz ForschAkad Hess. f. FAIR, HFHF (FHF)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
2. DFG project G:(GEPRIS)315477589 - TRR 211: Stark wechselwirkende Materie unter extremen Bedingungen (315477589) (315477589)
3. Physics of hot and dense matter - Theory (HFHF project) (I:(DE-Ds200)HFHF-HI-Th) (I:(DE-Ds200)HFHF-HI-Th)
4. SUC-GSI-Frankfurt - Strategic university cooperation GSI-U Frankfurt/M (SUC-GSI-FR) (SUC-GSI-FR)

Experiment(s):

1. no experiment theory work (theory)

Appears in the scientific report 2025

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