Abstract

We study the electromagnetic response of the quark–gluon plasma in AA-collisions at RHIC and LHC energies for a realistic space–time evolution of the plasma fireball. We demonstrate that for a realistic electric conductivity the electromagnetic response of the plasma is in a quantum regime when the induced electric current does not generate a classical electromagnetic field, and can only lead to a rare emission of single photons.

Highlights

  • Prediction of the chiral magnetic effect [1] in AA-collisions stimulated studies of magnetic field generated in heavy-ion collisions

  • In the initial stage the magnitude of the magnetic field falls rapidly with time (|By| ∝ t−3, y-axis being perpendicular to the reaction plane). It was suggested [4, 5] that the presence of the hot quark-gluon plasma (QGP) may increase the lifetime of the strong magnetic field

  • The effect of the QGP on the evolution of the electromagnetic field in AA-collisions has been estimated under the approximation of a uniform static matter in [4, 5, 8, 12]

Read more

Summary

INTRODUCTION

Collisions stimulated studies of magnetic field generated in heavy-ion collisions. In the noncentral AA-collisions the can magnetic field perpendicular reach the values eB ∼ 3m2π to for tRheH√IrCeac(√tiosn=pla2n00e. In the initial stage the magnitude of the magnetic field falls rapidly with time (|By| ∝ t−3, y-axis being perpendicular to the reaction plane) It was suggested [4, 5] that the presence of the hot quark-gluon plasma (QGP) may increase the lifetime of the strong magnetic field. In [12] it was obtained that for reasonable values of the conductivity the matter does not increase the lifetime of the strong (eB/m2π ∼ 1) magnetic field, and a significant effect was found only for the long-time evolution where eB/m2π ≪ 1. The probability of the photon emission from this mechanism is very small, and, due to a huge background from other mechanisms of the photon production, an experimental observation of the photons from this mechanism is practically impossible

THEORETICAL FRAMEWORK
MODEL OF THE FIREBALL
RESULTS AND DISCUSSION
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call