High-pT Hadron Spectra, Azimuthal Anisotropy and Back-to-Back Correlations in High-energy Heavy-ion Collisions
Xin-Nian Wang
Abstract
The observed suppression of high-pT 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 and π0 suppression in intermediate pT is consistent with the observed (K+p)/π enhancement which should disappear at pT>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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