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Title: 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

Abstract

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 firmlymore » 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.« less

Authors:
; ; ;  [1]
  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)
Publication Date:
OSTI Identifier:
21596603
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevC.84.014906; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Renk, Thorsten, Holopainen, Hannu, Paatelainen, Risto, and Eskola, Kari J. 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. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.84.014906.
Renk, Thorsten, Holopainen, Hannu, Paatelainen, Risto, & Eskola, Kari J. 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. United States. https://doi.org/10.1103/PHYSREVC.84.014906
Renk, Thorsten, Holopainen, Hannu, Paatelainen, Risto, and Eskola, Kari J. Fri . "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". United States. https://doi.org/10.1103/PHYSREVC.84.014906.
@article{osti_21596603,
title = {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},
author = {Renk, Thorsten and Holopainen, Hannu and Paatelainen, Risto and Eskola, Kari J},
abstractNote = {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.},
doi = {10.1103/PHYSREVC.84.014906},
url = {https://www.osti.gov/biblio/21596603}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 1,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}