Energy Dependence of Jet Quenching and Life-time of the Dense Matter in High-energy Heavy-ion Collisions

Details Energy Dependence of Jet Quenching and Life-time of the Dense Matter in High-energy Heavy-ion Collisions Energy Dependence of Jet Quenching and Life-time of the Dense Matter in High-energy Heavy-ion Collisions

2004-05-11

arxiv.org/abs/nucl-th/0405029v2

Phys.Rev. C70 (2004) 031901

Physics

Nuclear Physics

Nuclear Theory

6 pages in RevTex with 3 postscript figures

Scientific paper

10.1103/PhysRevC.70.031901

Suppression of high $p_T$ hadron spectra in high-energy heavy-ion collisions at different energies is studied within a pQCD parton model incorporating medium induced parton energy loss. The $p_T$ dependence of the nuclear modification factor $R_{AA}(p_T)$ is found to depend on both the energy dependence of the parton energy loss and the power-law behavior of the initial jet spectra. The high $p_T$ hadron suppression at $\sqrt{s}=62.4$ GeV and its centrality dependence are studied in detail. The overall values of the modification factor are found to provide strong constraints on the lifetime of the dense matter.

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