Year: 2006
Type: article
Abstract: Hard pQCD processes taking place in ultrarelativistic heavy-ion collisions are a well-calibrated probe. It is believed that the interaction with the surrounding medium of outgoing partons from a hard vertex is capable of revealing details of the medium. We demonstrate that correlation measurements of hard photon-hadron back-to-back coincidences are a tool suitable for extracting such tomographic information. Introducing the concept of averaged energy loss probability distributions, we first argue that almost no information about details of the medium evolution is reflected in the nuclear suppression factor ${R}_{\mathit{AA}}$. Thus, a wide variety of jet quenching scenarios and geometries are compatible with the measured data. This problem can be overcome by a \ensuremath{\gamma}-hadron correlation measurement. We show that averaged probability distributions for quarks are accessible experimentally, and we sketch an analysis procedure capable of distinguishing different energy loss scenarios leading to the same nuclear suppression factor.
Source: Physical Review C
Author: Thorsten Renk
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1552937371