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ID: 544825.0, MPI für Physik / MPI für Physik
Identified baryon and meson distributions at large transverse momenta from Au+Au collisions at s(NN)**(1/2) = 200 GeV
Authors:
Date of Publication (YYYY-MM-DD):2006
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys.Rev.Lett.
Issue / Number:97
Start Page:152301
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Transverse momentum spectra of $\pi^{\pm}$, $p$ and $\bar{p}$ up to 12 GeV/c at mid-rapidity in centrality selected Au+Au collisions at $\sqrt{s_{_{NN}}} = 200$ GeV are presented. In central Au+Au collisions, both $\pi^{\pm}$ and $p(\bar{p})$ show significant suppression with respect to binary scaling at $p_T >$ 4 GeV/c. Protons and anti-protons are less suppressed than $\pi^{\pm}$, in the range 1.5 $< p_{T} <$6 GeV/c. The $\pi^-/\pi^+$ and $\bar{p}/p$ ratios show at most a weak $p_T$ dependence and no significant centrality dependence. The $p/\pi$ ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at $p_T >$ 5 GeV/c. The results at high $p_T$ indicate that the partonic sources of $\pi^{\pm}$, $p$ and $\bar{p}$ have similar energy loss when traversing the nuclear medium.
Classification / Thesaurus:STAR
Comment of the Author/Creator:6 pages, 4 figures
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:
Identifiers:
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