Nuclear modification factor for charged pions and protons at forward rapidity in central Au + Au collisions at 200 GeV

I. Arsene, I. G. Bearden, D. Beavis, C. Besliu, B. Budick, H. Bøggild, C. Chasman, C. H. Christensen, P. Christiansen, R. Debbe, E. Enger, J. J. Gaardhøje, M. Germinario, K. Hagel, A. Holm, H. Ito, A. Jipa, F. Jundt, J. I. Jørdre, C. E. JørgensenR. Karabowicz, E. J. Kim, T. Kozik, T. M. Larsen, J. H. Lee, Y. K. Lee, S. Lindal, G. Lystad, G. Løvhøiden, Z. Majka, A. Makeev, M. Mikelsen, M. Murray, J. Natowitz, B. S. Nielsen, D. Ouerdane, R. Płaneta, F. Rami, C. Ristea, O. Ristea, D. Röhrich, B. H. Samset, D. Sandberg, S. J. Sanders, P. Staszel, T. S. Tveter, F. Videbæk, R. Wada, H. Yang, Z. Yin, I. S. Zgura

    Research output: Contribution to journalArticle

    Abstract

    We present spectra of charged pions and protons in 0-10% central Au + Au collisions at sqrt(sN N) = 200   GeV at mid-rapidity (y = 0) and forward pseudorapidity (η = 2.2) measured with the BRAHMS experiment at RHIC. The spectra are compared to spectra from p + p collisions at the same energy scaled by the number of binary collisions. The resulting nuclear modification factors for central Au + Au collisions at both y = 0 and η = 2.2 exhibit suppression for charged pions but not for (anti-) protons at intermediate pT. The over(p, ̄) / π- ratios have been measured up to pT ∼ 3   GeV / c at the two rapidities and the results indicate that a significant fraction of the charged hadrons produced at intermediate pT range are (anti-) protons at both mid-rapidity and η = 2.2.

    Original languageEnglish (US)
    Pages (from-to)219-223
    Number of pages5
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume650
    Issue number4
    DOIs
    StatePublished - Jul 5 2007

    Keywords

    • Nuclear modification factor
    • Particle production

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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  • Cite this

    Arsene, I., Bearden, I. G., Beavis, D., Besliu, C., Budick, B., Bøggild, H., Chasman, C., Christensen, C. H., Christiansen, P., Debbe, R., Enger, E., Gaardhøje, J. J., Germinario, M., Hagel, K., Holm, A., Ito, H., Jipa, A., Jundt, F., Jørdre, J. I., ... Zgura, I. S. (2007). Nuclear modification factor for charged pions and protons at forward rapidity in central Au + Au collisions at 200 GeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 650(4), 219-223. https://doi.org/10.1016/j.physletb.2007.05.017