Neutral Pion Distributions in PHENIX at RHIC

Abstract

Transverse momentum spectra for identified ${\pi }^0$'s in the range 1 GeV/c $<p_T<$ 4 GeV/c have been measured by the PHENIX experiment in Au-Au collisions at $\sqrt{s}=130$ GeV. The spectra from peripheral nuclear collisions are consistent with the simple expectation of scaling the spectra from p+p collisions by the average number of nucleon-nucleon binary collisions. The spectra from central collisions and the ratio of central/peripheral spectra are significantly suppressed when compared to point-like scaling.

6 pages, 3 figures

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