A review of quarkonia under strong magnetic fields

Abstract

We review the properties of quarkonia under strong magnetic fields. The main phenomena are (i) mixing between different spin eigenstates, (ii) quark Landau levels and deformation of wave function, (iii) modification of $\bar{Q}Q$ potential, and (iv) the motional Stark effect. For theoretical approaches, we review (i) constituent quark models, (ii) effective Lagrangians, (iii) QCD sum rules, and (iv) holographic approaches.

Comments: 14 pages, 9 figures, invited contribution to the EPJA topical issue "QCD Phase Diagram in Strong Magnetic Fields"; published version