  We study the influence of a background magnetic field on the melting of the
J/psi vector meson by introducing a Born-Infeld modification of the soft-wall
model. Out of the three polarizations of the massive vector meson, we find that
the longitudinal one (parallel to the applied magnetic field) melts only at an
even higher temperature than the deconfinement temperature, whereas the two
transverse polarizations melt at a lower temperature than in the absence of a
magnetic field. We also conduct a preliminary investigation of the effect of
the magnetic field on the heavy quark diffusion coefficient, showing an
increased diffusion constant for the longitudinal polarization with respect to
the transverse polarizations.
