Author Info

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