Magnetic susceptibility in the deconfined phase of QCD is calculated in a closed form using a recent general expression for the quark gas pressure in magnetic field. Quark selfenergies are entering the result via Polyakov line factors and ensure the total paramagnetic effect, increasing with temperature. A generalized form of magnetic susceptibility in nonzero magnetic field suitable for experimental and lattice measurements is derived, showing a good agreement with available lattice data.
@article{arxiv.1405.2697,
title = {Magnetic susceptibility in QCD},
author = {V. D. Orlovsky and Yu. A. Simonov},
journal= {arXiv preprint arXiv:1405.2697},
year = {2014}
}