Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-05-05
Phys.Lett.B595:165-170,2004
Physics
Nuclear Physics
Nuclear Theory
4 pages in RevTex with 4 figures, some typos corrected in the last version
Scientific paper
10.1016/j.physletb.2004.05.021
The observed suppression of high-$p_T$ hadron spectra, finite azimuthal anisotropy, disappearance of jet-like back-to-back correlations, and their centrality dependence in $Au+Au$ collisions at RHIC are shown to be quantitatively described by jet quenching within a pQCD parton model. The difference between $h^{\pm}$ and $\pi^0$ suppression in intermediate $p_T$ is consistent with the observed $(K+p)/\pi$ enhancement which should disappear at $p_T>6$ GeV/$c$. The suppression of back-to-back correlations is shown to be directly related to the medium modification of jet fragmentation functions(FF).
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