Heavy-Quark Diffusion Dynamics in Quark-Gluon Plasma under Strong   Magnetic Fields
  We discuss heavy-quark dynamics in the quark-gluon plasma under a strong magnetic field induced by colliding nuclei. By the use of the diagrammatic resummation techniques for Hard Thermal Loop and the external magnetic field, we show analytic results of heavy-quark diffusion coefficient and drag force which become anisotropic due to the preferred spatial orientation in the magnetic field. We argue that the anisotropic diffusion coefficient gives rise to an enhancement/suppression of the heavy-quark elliptic flow depending on the transverse momentum. 
Koichi Hattori, Kenji Fukushima, Ho-Ung Yee, and Yi Yin
hep-ph nucl-ex nucl-th