Parton energy loss in an expanding quark-gluon plasma: Radiative vs collisional
B. G. Zakharov
L.D. Landau Institute for Theoretical Physics, GSP-1, 117940, 117334 Moscow, Russia
We perform a comparison of the radiative and collisional parton
energy losses in an expanding quark-gluon plasma.
The radiative energy loss is calculated
within the light-cone path integral approach [7zakh-Z1]. The collisional
energy loss is calculated using the Bjorken method with an accurate
treatment of the binary collision kinematics.
Our numerical results demonstrate that for RHIC and LHC conditions
the collisional energy loss is relatively small in comparison to the
radiative one. We find an enhancement of the
heavy quark radiative energy loss
as compared to that of the light quarks
at high energies.