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arxiv: nucl-ex/0602018 · v1 · pith:F3M73X5Nnew · submitted 2006-02-17 · ⚛️ nucl-ex

Rapidity dependence of high p_T suppression at sqrt{s_(NN)}=62.4{GeV}

I. Arsene , I. G. Bearden , D. Beavis , C. Besliu , B. Budick , H. B{\o}ggild , C. Chasman , C. H. Christensen
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P. Christiansen J. Cibor R. Debbe E. Enger J. J. Gaardh{\o}je K. Hagel H. Ito A. Jipa F. Jundt E.B. Johnson J. I. J{\o}rdre C. E. J{\o}rgensen R. Karabowicz E. J. Kim T. Kozik T. M. Larsen J. H. Lee Y. K. Lee S. Lindal R. Lystad G. L{\o}vh{\o}iden Z. Majka M. Mikelsen M. Murray J. Natowitz B. Neumann B. S. Nielsen D. Ouerdane R. P{\l}aneta F. Rami{\i}res C. Ristea O. Ristea D. R\"ohrich B. H. Samset D. Sandberg S. J. Sanders R. A. Scheetz P. Staszel T. S. Tveter F. Videb{\ae}k R. Wada Z. Yin H. Yang I. S. Zgura
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keywords highsqrtfactorsfindmidrapiditymodificationnuclearsuppression
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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.

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