| Abstract: | We use recent nuclear parton distributions, among them the Hirai — Kumano — Nagai (HKN) and Eskola — Paukkunen — Salgado (EPS08)
parameterizations, in our pQCD-improved parton model to calculate the nuclear modification factor, R
AA′
(p
T
), at RHIC and at the LHC. At RHIC, the deuteron-gold nuclear modification factor for pions, measured at p
T
≥ 10 GeV/c in central collisions, appears to deviate more from unity than the model results. The slopes of the calculated
R
dAu
(p
T
) are similar to the slopes of the PHENIX pion and photon data. At LHC, without final-state effects we see a small enhancement
of R
dPb
(p
T
) in the transverse momentum range 10 GeV/c ≥ p
T
≥ 100 GeV/c for most parameterizations. The inclusion of final-state energy loss will reduce the R
dPb
(p
T
) values. |
