Nuclear effects on hadron production in d + Au collisions at √sNN = 200 GeV revealed by comparison with p + p data

Physical Review C - Nuclear Physics Volume 74 Issue 2 Page 024904-1-024904-13 published_at 2006-08-16
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Title ( eng )
Nuclear effects on hadron production in d + Au collisions at √sNN = 200 GeV revealed by comparison with p + p data
Creator
PHENIX Collaboration
Hachiya Takashi
Kohara Ryota
Nakamura Tomoaki
Tsuchimoto Yuji
Source Title
Physical Review C - Nuclear Physics
Volume 74
Issue 2
Start Page 024904-1
End Page 024904-13
Abstract
PHENIX has measured the centrality dependence of midrapidity pion, kaon, and proton transverse momentum distributions in d+Au and p+p collisions at √sNN=200 GeV. The p+p data provide a reference for nuclear effects in d+Au and previously measured Au+Au collisions. Hadron production is enhanced in d+Au, relative to independent nucleon-nucleon scattering, as was observed in lower energy collisions. The nuclear modification factor for (anti)protons is larger than that for pions. The difference increases with centrality but is not sufficient to account for the abundance of baryon production observed in central Au+Au collisions at the BNL Relativistic Heavy Ion Collider (RHIC). The centrality dependence in d+Au shows that the nuclear modification factor increases gradually with the number of collisions encountered by each participant nucleon. We also present comparisons with lower energy data as well as with parton recombination and other theoretical models of nuclear effects on particle production.
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2006-08-16
Rights
Copyright (c) 2006 The American Physical Society.
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0556-2813
[DOI] 10.1103/PhysRevC.74.024904
[NCID] AA00773613
[DOI] http://dx.doi.org/10.1103/PhysRevC.74.024904