Centrality dependence of charged hadron transverse momentum spectra in Au+Au collisions from √(sNN)=62.4 to 200 GeV

We have measured transverse momentum distributions of charged hadrons produced in Au+Au collisions at √(sNN)=62.4 GeV. The spectra are presented for transverse momenta 0.25<pT<4.5 GeV/c, in a pseudorapidity range of 0.2<η<1.4. The nuclear modification factor RAA is calculated relative to p+p data at the same collision energy as a function of collision centrality. For 2<pT<4.5 GeV/c, RAA is found to be significantly larger than in Au+Au collisions at √(sNN)= 130 and 200 GeV. In contrast to the large change in RAA, we observe a very similar centrality evolution of the pT spectra at √(sNN)=62.4 and 200 GeV. The dynamical origin of this surprising factorization of energy and centrality dependence of particle production in heavy-ion collisions remains to be understood