  With deep learning techniques, the degree of modification of energetic jets
that traversed hot QCD medium can be identified on a jet-by-jet basis. Due to
the strong correlations between the degree of jet modification and its
traversed length in the medium, we demonstrate the power of our novel method to
locate the creation point of a dijet pair in the nuclear overlap region. In
particular, jet properties, such as jet width and orientation can serve as
additional handles to locate the creation points to a higher level of
precision, which constitutes a significant development towards the
long-standing goal of using jets as tomographic probes of the quark-gluon
plasma.
