Particle Production in Strong Electromagnetic Fields in Relativistic Heavy-Ion Collisions

Figure 4

Relaxation of magnetic field at 𝑧=0 in vacuum (blue), in static conducting medium at 𝜎=5.8 MeV (red) and at 𝜎=16 MeV (brown), and in the expanding medium (green). Units of 𝐵 is fm⁻²≈2𝑚²_𝜋. 𝑏=7 fm, 𝑍=79 (gold nucleus), 𝛾=100 (RHIC).