Event-by-event distribution of magnetic field energy over initial fluid energy density in √s NN= 200 GeV Au-Au collisions

الأصل · EN

We estimate the event-by-event (e-by-e) distribution of the ratio (σ) of the magnetic field energy to the fluid energy density in the transverse plane of Au-Au collisions at √s NN = 200 GeV. A Monte-Carlo (MC) Glauber model is used to calculate the σ in the transverse plane for impact parameter b=0, 12 fm at time τᵢ 0.5 fm. The fluid energy density is obtained by using Gaussian smoothing with two different smoothing parameter σg=0.25, 0.5 fm. For b=0 fm collisions σ is found to be ≪ 1 in the central region of the fireball and σ 1 at the periphery. For b=12 fm collisions σ 1. The e-by-e correlation between σ and the fluid energy density (ε) is studied. We did not find strong correlation between σ and ε at the centre of the fireball, whereas they are mostly anti-correlated at the periphery of the fireball.