Where does the energy loss lose strength?
WoS ID: 000259358200067
Scopus ID: 54749149352
Nuclear modification factors for pion production in AuAu and CuCu collisions are analyzed at very high transverse momenta. At p(T) greater than or similar to 10 GeV/c, the RAA(pT) is determined mostly by the initial-state nuclear modifications (e. g. the EMC effect) and the non-Abelian jet energy loss in the final state. At high momenta these effects together are strong enough to suppress RAA(p(T)) to below 1 at RHIC energies. We display results using HKN shadowing in our pQCD-improved parton model. Result of a similar calculation at LHC energies for PbPb collisions is also displayed. Based on dN/dy estimates, a larger opacity value, L/lambda(g) approximate to 10 +/- 2, is used for the produced partonic matter in central collisions at the LHC.