Gluon spectrum in a quarkgluon plasma under strong magnetic fields
Abstract
We obtain the general expression of the gluon propagator at finite temperature (T ) and in a magnetic field (B ), for the case that the four transverse tensor structures appear in the gluon selfenergy. By using this expression and a specific form of the oneloop gluon selfenergy in the lowest Landau level approximation, we analyze the gluon spectrum in the strong magnetic field limit. As a result, we find that there exist two collective excitations of which the energies are of the order of p ∼g T with g being the coupling constant. One of the two excitations enjoys properties quite different from those of the collective excitations at B =0 which have been discussed by using the hard thermal loop approximation. We also discuss the static and dynamical screening effects, which are expected to be important for computation of transport coefficients in strong magnetic fields.
 Publication:

Physical Review D
 Pub Date:
 January 2018
 DOI:
 10.1103/PhysRevD.97.014023
 arXiv:
 arXiv:1704.03191
 Bibcode:
 2018PhRvD..97a4023H
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 12 pages, 8 figures