Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

8-2006

Journal or Book Title

Physical Review C

Volume

74

Issue

2

First Page

024904

DOI

10.1103/PhysRevC.74.024904

Abstract

PHENIX has measured the centrality dependence of midrapidity pion, kaon, and proton transverse momentum distributions in d+Au and p+p collisions at root 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 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.

Comments

This article is published as Adler, Stephen Scott, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, A. Al-Jamel, J. Alexander et al. "Nuclear effects on hadron production in d+ Au collisions at s NN= 200 GeV revealed by comparison with p+ p data." Physical Review C 74, no. 2 (2006): 024904. DOI: 10.1103/PhysRevC.74.024904. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

Included in

Nuclear Commons

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