Cold Nuclear Modifications at RHIC and LHC
نویسنده
چکیده
We use recent nuclear parton distributions, among them the Hirai –Kumano –Nagai (HKN) and Eskola –Paukkunen – Salgado (EPS08) parameterizations, in our pQCDimproved parton model to calculate the nuclear modification factor, RAA′(pT ), at RHIC and at the LHC. At RHIC, the deuteron-gold nuclear modification factor for pions, measured at pT ≥ 10 GeV/c in central collisions, appears to deviate more from unity than the model results. The slopes of the calculated RdAu(pT ) are similar to the slopes of the PHENIX pion and photon data. At LHC, without final-state effects we see a small enhancement of RdPb(pT ) in the transverse momentum range 10 GeV/c ≥ pT ≥ 100 GeV/c for most parameterizations. The inclusion of final-state energy loss will reduce the RdPb(pT ) values.
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