Journal
PHYSICAL REVIEW C
Volume 72, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.72.044901
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The measured transverse momentum spectra and HBT correlations of bulk (i.e., low p(T)) matter can be well explained by assuming that the soft sector of particles produced in ultrarelativistic heavy-ion collisions is (approximately) thermalized and undergoes collective accelerated expansion in both longitudinal and transverse direction. However, this implies that bulk matter will have a nonvanishing flow component transverse to the trajectory of a high p(T) partonic jets. In general, this will increase the energy loss experienced by the jet parton and modify the shape of the jet cone. In this paper, we present a systematic study of the magnitude of the additional energy loss induced by flow under realistic assumptions for the medium evolution. We argue that a perturbative QGP description may be sufficient for the measured R-AA if flow during the medium evolution is taken into account properly.
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