Heavy quarkonium production in a strong magnetic field

Abstract

It is well known that in noncentral heavy-ion collisions a transient strong magnetic field is generated in the direction perpendicular to the reaction plane. The maximal strength of this field is estimated to be $eB\sim m_{\pi }^2\sim 0.02{\text{GeV}}^2$ at the RHIC and $eB\sim 15m_{\pi }^2\sim 0.3{\text{GeV}}^2$ at the LHC. We investigate the effects of a strong magnetic field on $B$ and $D$ mesons, focusing on the changes of the energy levels and the masses of the bound states. Using the Color Evaporation Model we discuss the possible changes in the production of $J/\psi$ and ${\rm Y}$.

Comments: 18 pages, 7 figures