Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2006-03-08
Phys.Rev.C74:024904,2006
Physics
Nuclear Physics
Nuclear Experiment
330 authors, 13 pages text, RevTeX4, 18 figures, 2 tables. Submitted to Physical Review C. Plain text data tables for the poin
Scientific paper
10.1103/PhysRevC.74.024904
PHENIX has measured the centrality dependence of mid-rapidity pion, kaon and proton transverse momentum distributions in d+Au and p+p collisions at sqrt(s_NN) = 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 RHIC. The centrality dependence in d+Au shows that the nuclear modification factor increases gradually with the number of collisions suffered 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.
Adler Susanne
PHENIX Collaboration
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