Systematics of the charged-hadron P{sub T} spectrum and the nuclear suppression factor in heavy-ion collisions from {radical}(s{sub NN})=200 GeV to {radical}(s{sub NN})=2.76 TeV

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.014906· OSTI ID:21596603

Renk, Thorsten; Holopainen, Hannu; Paatelainen, Risto; Eskola, Kari J ^[1]

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1. Department of Physics, P.O. Box 35, FI-40014 University of Jyvaeskylae, Finland and Helsinki Institute of Physics, P.O. Box 64, FI-00014 University of Helsinki (Finland)

In this paper, our goal is to make a simultaneous analysis of the high- and low-P{sub T} parts of the charged-hadron P{sub T} spectrum measured by the ALICE collaboration [K. Aamodt et al. (ALICE Collaboration), Phys. Lett. B 696, 30 (2011)] in central Pb-Pb collisions at {radical}(s{sub NN})=2.76 TeV at the Large Hadron Collider (LHC), based on models which have been successfully applied and constrained in Au-Au collisions at the Relativistic Heavy Ion Collider (RHIC). For the hydrodynamical modeling with which we obtain the low-P{sub T} spectrum, we have computed the initial conditions based on perturbative QCD (pQCD) minijet production and saturation. The sensitivity of the obtained charged-hadron P{sub T} spectrum on the hydrodynamic model parameters is studied. For the high-P{sub T} part, we apply a number of parton-medium interaction models, which are tuned to describe the nuclear suppression factor R{sub AA} measured at RHIC in central Au-Au collisions at {radical}(s{sub NN})=200 GeV. We find that the higher kinematic reach of the LHC, manifest in the hardening of the pQCD parton spectral slope, is in principle very efficient in discriminating the various models. However, due to the uncertainties in the p-p baseline, none of the tested models can be firmly ruled out with the present ALICE data. Comparison with the LHC data in this approach shows that the combined hydrodynamic and pQCD + jet quenching components can reproduce the data well in the whole measured P{sub T} range.

• OSTI ID: 21596603
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 84, Issue 1; Other Information: DOI: 10.1103/PhysRevC.84.014906; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALICE
ATOM-ATOM COLLISIONS
BROOKHAVEN RHIC
CERN LHC
COMPARATIVE EVALUATIONS
GEV RANGE 100-1000
GOLD
HADRONS
HEAVY ION REACTIONS
HYDRODYNAMIC MODEL
LEAD
QUANTUM CHROMODYNAMICS
QUENCHING
SATURATION
SENSITIVITY
SIMULATION
TEV RANGE 01-10
ACCELERATORS
ATOM COLLISIONS
COLLISIONS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EVALUATION
FIELD THEORIES
GEV RANGE
HEAVY ION ACCELERATORS
MAGNETIC MIRRORS
MATHEMATICAL MODELS
METALS
NUCLEAR REACTIONS
OPEN PLASMA DEVICES
PARTICLE MODELS
QUANTUM FIELD THEORY
STATISTICAL MODELS
STORAGE RINGS
SYNCHROTRONS
TEV RANGE
THERMODYNAMIC MODEL
THERMONUCLEAR DEVICES
TRANSITION ELEMENTS