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    Transverse-momentum spectra in Au plus Au and d plus Au collisions at root s(NN)=200 GeV and the pseudorapidity dependence of high-p(T) suppression

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    e072305.pdf (131.5Kb)
    Issue Date
    2003-08
    Author
    Ito, H.
    Murray, Michael J.
    Neumann, B.
    Norris, J.
    Sanders, Stephen J.
    Publisher
    AMERICAN PHYSICAL SOC
    Type
    Article
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    Abstract
    We present spectra of charged hadrons from Au+Au and d+Au collisions at roots(NN)=200 GeV measured with the BRAHMS experiment at RHIC. The spectra for different collision centralities are compared to spectra from p+(p) over bar collisions at the same energy scaled by the number of binary collisions. The resulting ratios (nuclear modification factors) for central Au+Au collisions at eta=0 and eta=2.2 evidence a strong suppression in the high p(T) region (>2 GeV/c). In contrast, the d+Au nuclear modification factor (at eta=0) exhibits an enhancement of the high p(T) yields. These measurements indicate a high energy loss of the high p(T) particles in the medium created in the central Au+Au collisions. The lack of suppression in d+Au collisions makes it unlikely that initial state effects can explain the suppression in the central Au+Au collisions.
    URI
    http://hdl.handle.net/1808/1620
    DOI
    https://doi.org/10.1103/PhysRevLett.91.072305
    Collections
    • Physics & Astronomy Scholarly Works [1713]
    Citation
    Arsene, I; Bearden, IG, et al. Transverse-momentum spectra in Au plus Au and d plus Au collisions at root s(NN)=200 GeV and the pseudorapidity dependence of high-p(T) suppression. PHYSICAL REVIEW LETTERS. August 2003. 91(7)

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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