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Title: Identified particle spectra and anisotropic flow in an event-by-event hybrid approach in Pb + Pb collisions at {radical}(s{sub NN})=2.76 TeV

Abstract

The first results from heavy ion collisions at the Large Hadron Collider for charged-particle spectra and elliptic flow are compared to an event-by-event hybrid approach with an ideal hydrodynamic expansion. This approach has been shown to successfully describe bulk observables at the BNL Relativistic Heavy Ion Collider. Without changing any parameters of the calculation, the same approach is applied to Pb + Pb collisions at {radical}(s{sub NN})=2.76 TeV. This is an important test if the established understanding of the dynamics of relativistic heavy ion collisions is also applicable at even higher energies. Specifically, we employ the hybrid approach with two different equations of state and the pure hadronic transport approach to indicate sensitivities to finite viscosity. The centrality dependence of the charged hadron multiplicity, p{sub T} spectra, and differential elliptic flow are shown to be in reasonable agreement with the ALICE Collaboration data. Furthermore, we make predictions for the transverse mass spectra of identified particles and triangular flow. The eccentricities and their fluctuations are found to be surprisingly similar to the ones at lower energies, and therefore, the triangular flow results are very similar. Any deviations from these predictions will indicate the need for different physics mechanisms responsible for themore » dynamics of heavy ion collisions.« less

Authors:
 [1]
  1. Department of Physics, Duke University, Durham, North Carolina 27708-0305 (United States)
Publication Date:
OSTI Identifier:
21596781
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.84.034912; (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; ANISOTROPY; ATOM-ATOM COLLISIONS; BNL; BROOKHAVEN RHIC; CERN LHC; CHARGED PARTICLES; COLLISIONS; EQUATIONS OF STATE; FLUCTUATIONS; HADRONS; HEAVY ION REACTIONS; LEAD; MASS SPECTRA; MULTIPLICITY; RELATIVISTIC RANGE; SENSITIVITY; TEV RANGE 01-10; TRANSVERSE MOMENTUM; ACCELERATORS; ATOM COLLISIONS; CYCLIC ACCELERATORS; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; EQUATIONS; HEAVY ION ACCELERATORS; LINEAR MOMENTUM; MAGNETIC MIRRORS; METALS; NATIONAL ORGANIZATIONS; NUCLEAR REACTIONS; OPEN PLASMA DEVICES; SPECTRA; STORAGE RINGS; SYNCHROTRONS; TEV RANGE; THERMONUCLEAR DEVICES; US AEC; US DOE; US ERDA; US ORGANIZATIONS; VARIATIONS

Citation Formats

Petersen, Hannah. Identified particle spectra and anisotropic flow in an event-by-event hybrid approach in Pb + Pb collisions at {radical}(s{sub NN})=2.76 TeV. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.84.034912.
Petersen, Hannah. Identified particle spectra and anisotropic flow in an event-by-event hybrid approach in Pb + Pb collisions at {radical}(s{sub NN})=2.76 TeV. United States. doi:10.1103/PHYSREVC.84.034912.
Petersen, Hannah. Thu . "Identified particle spectra and anisotropic flow in an event-by-event hybrid approach in Pb + Pb collisions at {radical}(s{sub NN})=2.76 TeV". United States. doi:10.1103/PHYSREVC.84.034912.
@article{osti_21596781,
title = {Identified particle spectra and anisotropic flow in an event-by-event hybrid approach in Pb + Pb collisions at {radical}(s{sub NN})=2.76 TeV},
author = {Petersen, Hannah},
abstractNote = {The first results from heavy ion collisions at the Large Hadron Collider for charged-particle spectra and elliptic flow are compared to an event-by-event hybrid approach with an ideal hydrodynamic expansion. This approach has been shown to successfully describe bulk observables at the BNL Relativistic Heavy Ion Collider. Without changing any parameters of the calculation, the same approach is applied to Pb + Pb collisions at {radical}(s{sub NN})=2.76 TeV. This is an important test if the established understanding of the dynamics of relativistic heavy ion collisions is also applicable at even higher energies. Specifically, we employ the hybrid approach with two different equations of state and the pure hadronic transport approach to indicate sensitivities to finite viscosity. The centrality dependence of the charged hadron multiplicity, p{sub T} spectra, and differential elliptic flow are shown to be in reasonable agreement with the ALICE Collaboration data. Furthermore, we make predictions for the transverse mass spectra of identified particles and triangular flow. The eccentricities and their fluctuations are found to be surprisingly similar to the ones at lower energies, and therefore, the triangular flow results are very similar. Any deviations from these predictions will indicate the need for different physics mechanisms responsible for the dynamics of heavy ion collisions.},
doi = {10.1103/PHYSREVC.84.034912},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}