On the energy loss of high energy quarks in a finite-size quark-gluon plasma
B. G. Zakharov
Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany
L. D. Landau Institute for Theoretical Physics RAS, 142432 Chernogolovka, Moscow region, Russia
PACS: 12.38.-t
Abstract
We study within the light-cone path integral approach the induced gluon
emission from a fast quark passing through a finite-size QCD plasma.
We show that the leading log approximation used in previous studies
fails when the gluon formation length becomes of the order of
the length of the medium traversed by the quark.
Calculation of the energy loss beyond the leading log
approximation gives the energy loss which grows logarithmically with quark
energy contrary to the energy independent prediction of the leading
log approximation.