  The drag and diffusion coefficients of heavy quarks propagating through quark
gluon plasma (QGP) have been estimated by shielding both the electric and
magnetic type infra-red divergences. The electric type screening in
perturbative quantum chromodynamics (pQCD) has been widely studied and used in
evaluating the diffusion coefficient of heavy quarks (HQs). To our knowledge
the impact of magnetic screening in diffusion coefficients of HQs is not
studied before. It is found that the effect of magnetic screening mass on the
drag and diffusion coefficients of HQs is quite significant and its
contribution should not be ignored for explaining the experimental data of
heavy quark observables.
