TY  - JOUR
A1  - Dash, Ashutosh
A1  - Panda, Ankit Kumar
T1  - Charged participants and their electromagnetic fields in an expanding fluid
T2  - Physics letters B
N2  - We investigate the space-time dependence of electromagnetic fields produced by charged participants in an expanding fluid. To address this problem, we need to solve the Maxwell's equations coupled to the hydrodynamics conservation equation, specifically the relativistic magnetohydrodynamics (RMHD) equations, since the charged participants move with the flow. To gain analytical insight, we approximate the problem by solving the equations in a fixed background Bjorken flow, onto which we solve Maxwell's equations. The dynamical electromagnetic fields interact with the fluid's kinematic quantities such as the shear tensor and the expansion scalar, leading to additional non-trivial coupling. We use mode decomposition of Green's function to solve the resulting non-linear coupled wave equations. We then use this function to calculate the electromagnetic field for two test cases: a point source and a transverse charge distribution. The results show that the resulting magnetic field vanishes at very early times, grows, and eventually falls at later times.
Y1  - 2023
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/75039
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-750398
SN  - 1873-2445
VL  - 848.2024
IS  - 138342
PB  - Elsevier
CY  - Amsterdam [u.a.]
ER  -