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T.M. Cormier, Wayne State University
M.R. Cosentino, Universidade de Sao Paulo
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H.J. Crawford, University of California - Berkeley
D. Das, Variable Energy Cyclotron Centre
S. Das, Variable Energy Cyclotron Centre
S. Dash, Institute of Physics
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S.M. Guertin, University of California, Los Angeles
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B. Haag, University of California, Davis
T.J. Hallman, Brookhaven National Laboratory
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W. He, Indiana University
M. Heinz, Yale University
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G.W. Hoffmann, University of Texas at Austin
M.J. Horner, Lawrence Berkeley National Laboratory
H.Z. Huang, University of California, Los Angeles
S.L. Huang, University of Science & Technology of China
E.W. Hughes, California Institute of Technology
T.J. Humanic, Ohio State University - Main Campus
G. Igo, University of California, Los Angeles
P. Jacobs, Lawrence Berkeley National Laboratory
W.W. Jacobs, Indiana University - Bloomington
P. Jakl, Nuclear Physics Institute AS CR
F. Jia, Institute of Modern Physics
H. Jiang, University of California, Los Angeles
P.G. Jones, University of Birmingham
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J. Kapitan, Nuclear Physics Institute AS CR
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Z. Liu, Institute of Particle Physics
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I.-K. Yoo, Pusan National University
V.I. Yurevich, Laboratory for High Energy
W. Zhan, Institute of Modern Physics
H. Zhang, Brookhaven National Laboratory
W.M. Zhang, Kent State University

Abstract

Transverse momentum spectra of π±, p, and ¯p up to 12  GeV/c at midrapidity in centrality selected Au+Au collisions at √sNN=200  GeV are presented. In central Au+Au collisions, both π± and p(¯p) show significant suppression with respect to binary scaling at pT≳4  GeV/c. Protons and antiprotons are less suppressed than π±, in the range 1.5≲pT≲6  GeV/c. The π−/π+ and ¯p/p ratios show at most a weak pT dependence and no significant centrality dependence. The p/π ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at pT≳5  GeV/c. The results at high pT indicate that the partonic sources of π±, p, and ¯p have similar energy loss when traversing the nuclear medium.

Disciplines

Physics

Number of Pages

6

Publisher statement

NOTE: At the time of publication, the author Thomas Gutierrez was not yet affiliated with Cal Poly.

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URL: https://digitalcommons.calpoly.edu/phy_fac/525