  In this work we have studied the collisional energy loss of a heavy quark
propagating through a high temperature QCD plasma consisting of both heavy and
light quarks to leading logarithmic order in the Quantum Chromodynamics (QCD)
coupling constant. The formalism adopted in this work shows a significant
enhancement for the charm quark energy loss when the bath particles are also
considered to be heavy in addition to light quarks. We know the running
coupling constant is dependent on the momentum of the particles and the
temperature of the system. Therefore, we have presented a comparison of the
energy loss of the charm quark due to scattering with another heavy quark with
constant and running coupling constant for different temperatures. The results
show a substantial increase of the energy loss when compared to the fixed
coupling case.

High Energy Physics - Phenomenology