DOI 10.1007/s100520000437
Nuclear geometry of jet quenching
I.P. Lokhtin - A.M. Snigirev
M.V. Lomonosov Moscow State University,
D.V. Skobeltsyn Institute of Nuclear Physics,
Moscow, Russia
Received: 10 February 2000 / Revised version: 18 April 2000 / Published online: 6 July 2000 - © Springer-Verlag 2000
Abstract
The most suitable way to study jet quenching as a function
of the distance traversed
is varying the impact parameter b of the ultrarelativistic
nucleus-nucleus
collision
(the initial energy density in the nuclear overlapping zone is
almost
independent of b up to
). It is shown that the
b-dependences of the medium-induced
radiative and
collisional energy losses of a hard parton jet propagating through
dense QCD matter are
very different. The experimental verification of this phenomenon
could be performed for
a jet with non-zero cone size based on the essential difference
between the angular
distributions of the collisional and radiative energy losses.
Copyright Società Italiana di Fisica, Springer-Verlag 2000
