Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions at s NN =200 GeV

BRAHMS Collaboration

    Research output: Contribution to journalArticle

    Abstract

    The BRAHMS collaboration has measured transverse momentum spectra of pions, kaons, protons, and antiprotons at rapidities 0 and 3 for Cu+Cu collisions at sNN=200 GeV. As the collisions become more central the collective radial flow increases while the temperature of kinetic freeze-out decreases. The temperature is lower and the radial flow weaker at forward rapidity. Pion and kaon yields with transverse momenta between 1.5 and 2.5 GeV/c are suppressed for central collisions relative to scaled p+p collisions. This suppression, which increases as the collisions become more central, is consistent with jet quenching models and is also present with comparable magnitude at forward rapidity. At such rapidities, initial state effects may also be present and persistence of the meson suppression to high rapidity may reflect a combination of jet quenching and nuclear shadowing. The ratio of protons to mesons increases as the collisions become more central and is largest at forward rapidities.

    Original languageEnglish (US)
    Article number014907
    JournalPhysical Review C
    Volume94
    Issue number1
    DOIs
    StatePublished - Jul 20 2016

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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