High charged hadron suppression in Au + Au collisions at GeV
Aug, 2003Citations per year
Abstract:
The PHENIX experiment at RHIC has measured charged hadron yields at mid-rapidity over a wide range of transverse momentum (0.5 < p_T < 10 GeV/c) in Au+Au collisions at sqrt(s_NN)=200 GeV. The data are compared to pi^zero measurements from the same experiment. For both charged hadrons and neutral pions, the yields per nucleon-nucleon collision are significantly suppressed in central compared to peripheral and nucleon-nucleon collisions. The suppression sets in gradually and increases with increasing centrality of the collisions. Above 4-5 GeV/c in p_T, a constant and almost identical suppression of charged hadrons and pi^zeroes is observed. The p_T spectra are compared to published spectra from Au+Au at sqrt(s_NN)=130 in terms of x_t scaling. Central and peripheral pi^zero as well as peripheral charged spectra exhibit the same x_t scaling as observed in p+p data.Note:
- 325 authors, 22 pages text, 18 figures, 6 tables, RevTeX 4. Minor revisions to address referee concerns during journal review. Now published in Physical Review C as a regular article. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are publicly available at http://www.phenix.bnl.gov/papers.html Journal-ref: Phys.Rev. C 69, 034910 (2004)
- 25.75.Dw
- nucleus nucleus: colliding beams
- scattering: heavy ion
- gold
- transverse momentum: high
- hadron: multiple production
- yield: (charged particle pi0)
- impact parameter: dependence
- transverse momentum: spectrum
- energy dependence
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