Nuclear effects on hadron production in d+Au collisions at {radical}(s{sub NN})=200 GeV revealed by comparison with p+p data

Journal Article · Tue Aug 15 04:00:00 EDT 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.74.024904· OSTI ID:20863735

Adler, S S; Aronson, S H; Chujo, T; David, G; Desmond, E J; Franz, A; Haggerty, J S; Harvey, M; Johnson, B M; Kistenev, E; Kroon, P J; Makdisi, Y I; Mioduszewski, S; Mitchell, J T; Morrison, D P; O'Brien, E; Pinkenburg, C; Pisani, R P; Purschke, M L; Shea, T K ^[1]

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1. Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)

PHENIX has measured the centrality dependence of midrapidity pion, kaon, and proton transverse momentum distributions in d+Au and p+p collisions at {radical}(s{sub 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.

• OSTI ID: 20863735
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 74; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABUNDANCE
BROOKHAVEN RHIC
COMPARATIVE EVALUATIONS
DEUTERON REACTIONS
DISTRIBUTION
GEV RANGE
GLUONS
GOLD 197 REACTIONS
GOLD 197 TARGET
KAONS
MULTIPARTICLE SPECTROMETERS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
PIONS
PROTONS
QUARKS
RECOMBINATION
TRANSVERSE MOMENTUM