Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-05-03
Phys.Rev.Lett. 77 (1996) 231-234
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages in RevTex twocolumn with embedded psfigures
Scientific paper
10.1103/PhysRevLett.77.231
We point out that events associated with large $E_T$ direct photons in high-energy heavy-ion collisions can be used to study jet energy loss in dense matter. In such events, the $p_T$ spectrum of charged hadrons from jet fragmentation in the opposite direction of the tagged photon is estimated to be well above the background which can be reliably subtracted at moderately large $p_T$. We demonstrate that comparison between the extracted fragmentation function in $AA$ and $pp$ collisions can be used to determine the jet energy loss and the interaction mean-free-path in the dense matter produced in high-energy heavy-ion collisions.
Huang Zheng
Sarcevic Ina
Wang Xin-Nian
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