Pb-Pb collisions at {radical}(s{sub NN})=2.76 TeV in a multiphase transport model

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.034904· OSTI ID:21499515

Jun, Xu ^[1]; Ko, Che Ming ^[2]

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1. Cyclotron Institute, Texas A and M University, College Station, Texas 77843-3366 (United States)
2. Cyclotron Institute and Department of Physics and Astronomy, Texas A and M University, College Station, Texas 77843-3366 (United States)

The multiplicity and elliptic flow of charged particles produced in Pb-Pb collisions at center of mass energy {radical}(s{sub NN})=2.76 TeV from the Large Hadron Collider are studied in a multiphase transport (AMPT) model. With the standard parameters in the HIJING model, which is used as initial conditions for subsequent partonic and hadronic scatterings in the AMPT model, the resulting multiplicity of final charged particles at mid-pseudorapidity is consistent with the experimental data measured by the ALICE Collaboration. This value is, however, increased by about 25% if the final-state partonic and hadronic scatterings are turned off. Because of final-state scatterings, particularly those among partons, the final elliptic flow of charged hadrons is also consistent with the ALICE data if a smaller but more isotropic parton scattering cross section than previously used in the AMPT model for describing the charged hadron elliptic flow in heavy ion collisions at the Relativistic Heavy Ion Collider is used. The resulting transverse momentum spectra of charged particles as well as the centrality dependence of their multiplicity density and the elliptic flow are also in reasonable agreement with the ALICE data. Furthermore, the multiplicities, transverse momentum spectra, and elliptic flows of identified hadrons such as protons, kaons, and pions are predicted.

• OSTI ID: 21499515
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevC.83.034904; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
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ATOM-ATOM COLLISIONS
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CROSS SECTIONS
HEAVY ION REACTIONS
KAONS
LEAD
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ATOM COLLISIONS
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HADRONS
HEAVY ION ACCELERATORS
LINEAR MOMENTUM
MAGNETIC MIRRORS
MESONS
METALS
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