Back to Search
Start Over
Pion, kaon, proton and anti-proton transverse momentum distributions from p+p and d+Au collisions at sNN=200 GeV
- Source :
- Physics Letters B. 616:8-16
- Publication Year :
- 2005
- Publisher :
- Elsevier BV, 2005.
-
Abstract
- Identified mid-rapidity particle spectra of pi(+/-), K+/-, and p((p) over bar) from 200 GeV p + p and d + Au collisions are reported. A time-of-flight detector based on multi-gap resistive plate chamber technology is used for particle identification. The particle-species dependence of the Cronin effect is observed to be significantly smaller than that at lower energies. The ratio of the nuclear modification factor (R-dAu) between protons (p + (p) over bar) and charged hadrons (h) in the transverse momentum range 1.2 < p(T) < 3.0 GeV/c is measured to be 1.19 +/- 0.05(stat) +/- 0.03(syst) in minimum-bias collisions and shows little centrality dependence. The yield ratio of (p + (p) over bar)/h in minimum-bias d + Au collisions is found to be a factor of 2 lower than that in Au + Au collisions, indicating that the Cronin effect alone is not enough to account for the relative baryon enhancement observed in heavy ion collisions at RHIC. (c) 2005 Elsevier B.V. All rights reserved.
- Subjects :
- Quantum chromodynamics
Physics
Nuclear and High Energy Physics
Proton
010308 nuclear & particles physics
Hadron
7. Clean energy
01 natural sciences
Particle identification
Baryon
Nuclear physics
Pion
Antiproton
0103 physical sciences
High Energy Physics::Experiment
Nuclear Experiment
010306 general physics
Bar (unit)
Subjects
Details
- ISSN :
- 03702693
- Volume :
- 616
- Database :
- OpenAIRE
- Journal :
- Physics Letters B
- Accession number :
- edsair.doi...........d15cbf3b0030b355d98e3f33a4984500