Rapidity dependence of high p_T suppression at sqrt{s_{NN}}=62.4{GeV}
/ Authors
I. Arsene, I. Bearden, D. Beavis, C. Besliu, B. Budick, H. Boggild, C. Chasman, C. H. Christensen, P. Christiansen, J. Cibor
and 42 more authors
R. Debbe, E. Enger, J. Gaardhøje, K. Hagel, H. Ito, A. Jipa, F. Jundt, E. Johnson, J. I. Jørdre, C. Jørgensen, R. Karabowicz, E. Kim, T. Kozik, T. M. Larsen, J. Lee, Y. Lee, S. Lindal, R. Lystad, G. Løvhøiden, Z. Majka, M. Mikelsen, M. Murray, J. Natowitz, B. Neumann, B. Nielsen, D. Ouerdane, R. Planeta, F. Ramiıres, C. Ristea, O. Ristea, D. Røhrich, B. Samset, D. Sandberg, S. Sanders, R. Scheetz, P. Staszel, T. Tveter, F. Videbaek, R. Wada, Z. Yin, H. Yang, I. Zgură
/ Abstract
We present measurements of charged hadron p_T spectra from Au+Au collisions at sqrt(snn)=62.4 GeV for pseudorapidities eta=0, eta=1 and eta=3.2. Around midrapidity (eta=0, eta=1) we find nuclear modification factors at levels suggesting a smaller degree of high p_T suppression than in the same reaction at higher energy sqrt(snn)=200 GeV. At the high pseudorapidity, eta=3.2, where nuclear modification factors cannot be constructed due to the lack of p+p reference data, we find a significant reduction of R_{CP} (central to peripheral ratio) as compared to midrapidity.