High transverse momentum hadron spectra at sNN=17.3 GeV in Pb+Pb and p+p collisions

C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. DinkelakerV. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, D. Kikola, M. Kliemant, S. Kniege, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, A. László, R. Lacey, M. Van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, W. Peryt, M. Pikna, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, M. Slodkowski, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, M. Szuba, P. Szymanski, V. Trubnikov, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, A. Wojtaszek, I. K. Yoo, J. Zimányi

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44 Citations (Scopus)

Abstract

Transverse momentum spectra up to 4.5GeV/c around midrapidity of π±,p,p̄, and K± in Pb+Pb reactions were measured at sNN=17.3GeV by the CERN-NA49 experiment. The nuclear modification factors RAA for π± and RCP for π±,p,p̄,K± were extracted and compared with results obtained at the BNL Relativistic Heavy Ion Collider (RHIC) at sNN=200GeV. The modification factor RAA shows a rapid increase with transverse momentum in the covered region. This indicates that the Cronin effect is the dominating effect in our energy range. The modification factor RCP, in which the contribution of the Cronin effect is reduced, shows a saturation well below unity in the π± channel. The extracted RCP values follow the 200GeV RHIC results closely in the available transverse momentum range, except for π± above 2.5GeV/c transverse momentum. There the measured suppression is smaller than that observed at RHIC.

Original languageEnglish
Article number034906
JournalPhysical Review C - Nuclear Physics
Volume77
Issue number3
DOIs
Publication statusPublished - Mar 28 2008

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Alt, C., Anticic, T., Baatar, B., Barna, D., Bartke, J., Betev, L., Białkowska, H., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Bunčić, P., Cerny, V., Christakoglou, P., Chung, P., Chvala, O., Cramer, J. G., Csató, P., ... Zimányi, J. (2008). High transverse momentum hadron spectra at sNN=17.3 GeV in Pb+Pb and p+p collisions. Physical Review C - Nuclear Physics, 77(3), [034906]. https://doi.org/10.1103/PhysRevC.77.034906