Spectra and elliptic flow for identified hadrons in2.76ATeV Pb + Pb collisions

2013/11/30 by Huichao Song, Steffen A. Bass, Steffen Bass +2 · 1 citation
Physics and Astronomy · #Annihilation #Baryon #Decoupling (probability) #Elliptic flow #Geometry #Hadron #Heavy ion #High-Energy Particle Collisions Research #Ion #Large Hadron Collider #Meson #Multiplicity (mathematics) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spectral line #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.89.034919

published as Phys. Rev. C 89, 034919 (2014) · 9 pages, 8 figures, wiith Fig.2 updated in version 2

arxiv created 2014/01/23 · openalex publication_date 2014/03/31 · arxiv updated 2014/04/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Using the vishnu hybrid model that couples (2+1)-dimensional viscous hydrodynamics to a microscopic hadronic transport model, we calculate the multiplicity, p_T spectra, and elliptic flow for pions, kaons, and protons in 2.76A TeV Pb+Pb collisions, using mc-kln initializations with smoothed initial conditions, obtained by averaging over a large number of events. The results from our calculations are compared to data from the ALICE Collaboration, showing nice agreement over several centrality bins. Using the same inputs, we predict the p_T spectra and elliptic flow for \ensuremathφ mesons and explore their flow development in the strong and weak coupling limits through hydrodynamic calculations with different decoupling temperatures. In addition we study the influence of baryon and antibaryon annihilation processes on common observables and demonstrate that, by including annihilation processes below a switching temperature of 165 MeV, vishnu provides a good description of the multiplicity and p_T spectra for pions, kaons, and protons measured by PHENIX and ALICE at both the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC).

Citations

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