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Spectra of identified high-pT pi± and p(p[over-bar]) in Cu+Cu collisions at [sqrt]sNN=200 GeV

Author(s)
Balewski, Jan T.; Surrow, Bernd; Betancourt, Michael Joseph; Corliss, Ross Cameron; Hays-Wehle, James Prewitt; Jones, Christopher LaDon; Kocoloski, Adam Philip; Leight, William Axel; Sakuma, Tai; Seele, Joseph Patrick; van Nieuwenhuizen, Gerrit J; Walker, Matthew H; Hoffman, Alan Michael; Milner, Richard G; Redwine, Robert P; ... Show more Show less
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Alternative title
Spectra of identified high-pT π± and p(p¯) in Cu+Cu collisions at √sNN=200 GeV
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We report new results on identified (anti)proton and charged pion spectra at large transverse momenta (3<pT<10 GeV/c) from Cu+Cu collisions at [sqrt]sNN=200 GeV using the STAR detector at the Relativistic Heavy Ion Collider (RHIC). This study explores the system size dependence of two novel features observed at RHIC with heavy ions: the hadron suppression at high-pT and the anomalous baryon to meson enhancement at intermediate transverse momenta. Both phenomena could be attributed to the creation of a new form of QCD matter. The results presented here bridge the system size gap between the available pp and Au+Au data, and allow for a detailed exploration of the onset of the novel features. Comparative analysis of all available 200 GeV data indicates that the system size is a major factor determining both the magnitude of the hadron spectra suppression at large transverse momenta and the relative baryon to meson enhancement.
Date issued
2010-05
URI
http://hdl.handle.net/1721.1/58097
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review C
Publisher
American Physical Society
Citation
STAR Collaboration et al. “Spectra of identified high-pT pi[superscript ±] and p(p-bar) in Cu+Cu collisions at [sqrt]sNN=200 GeV.” Physical Review C 81.5 (2010): 054907. © 2010 American Physical Society.
Version: Final published version
ISSN
0556-2813

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