Identified Particle Spectra and Anisotropic Flow in an Event-by-Event Hybrid Approach in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ 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 RHIC. Without changing any parameters of the calculation the same approach is applied to Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ 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, $p_T$ spectra and differential elliptic flow are shown to be in reasonable agreement with the ALICE 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 also the triangular flow results are very similar. Any deviations from these predictions will indicate the need for new physics mechanisms responsible for the dynamics of heavy ion collisions.

6 pages, 7 figures

References in corpus (26)

• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• Elliptic flow of charged particles in Pb-Pb collisions at 2.76 TeV
• Elliptic and triangular flow in event-by-event (3+1)D viscous hydrodynamics
• Centrality dependence of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Event-by-event shape and flow fluctuations of relativistic heavy-ion collision fireballs
• Thermal Dileptons at LHC
• Heavy-Quark Kinetics in the QGP at LHC
• Space-time evolution of bulk QCD matter
• Influence of the shear viscosity of the quark-gluon plasma on elliptic flow in ultrarelativistic heavy-ion collisions
• Triangular flow in event-by-event ideal hydrodynamics in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200A$ GeV
• Anisotropic flow in sqrt(s)=2.76 TeV Pb+Pb collisions at the LHC
• Event-by-event hydrodynamics and elliptic flow from fluctuating initial state
• On the necessity to include event-by-event fluctuations in experimental evaluation of elliptical flow
• Elliptic flow in 200 A GeV Au+Au collisions and 2.76 A TeV Pb+Pb collisions: insights from viscous hydrodynamics + hadron cascade hybrid model
• An effective chiral Hadron-Quark Equation of State
• Elliptic flow in Pb+Pb collisions at sqrt{s_{NN}} = 2.76 TeV: hybrid model assessment of the first data
• Elliptic flow at energies available at the CERN Large Hadron Collider: Comparing heavy-ion data to viscous hydrodynamic predictions
• Systematics of the charged-hadron P_T spectrum and the nuclear suppression factor in heavy-ion collisions from sqrt{s}=200 GeV to sqrt{s} =2.76 TeV
• Constraining the initial state granularity with bulk observables in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200$ GeV
• Charged particle (pseudo-)rapidity distributions in proton+anti-proton/proton+proton and Pb+Pb/Au+Au collisions from SPS to LHC energies from UrQMD
• $<m_T>$ excitation function: Freeze-out and equation of state dependence
• Medium-modified Jets and Initial State Fluctuations as Sources of Charge Correlations Measured at RHIC
• Initial indications for the production of a strongly coupled plasma in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV

Cited by in corpus (27)

• Centrality dependence of $\pi$, K, p production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Event-by-event distributions of azimuthal asymmetries in ultrarelativistic heavy-ion collisions
• Extraction of Heavy-Flavor Transport Coefficients in QCD Matter
• Initial State Fluctuations and Final State Correlations in Relativistic Heavy-Ion Collisions
• Particle spectra in Pb-Pb collisions at 2.76 TeV
• Full jet in quark-gluon plasma with hydrodynamic medium response
• Eliminating experimental bias in anisotropic-flow measurements of high-energy nuclear collisions
• Integrated Dynamical Approach to Relativistic Heavy Ion Collisions
• Non-thermal p/pi ratio at LHC as a consequence of hadronic final state interactions
• Hybrid Stars in an SU(3) Parity Doublet Model
• Nuclear modification of jet shape for inclusive jets and $\gamma$-jets at the LHC energies
• Hydrodynamics at large baryon densities: Understanding proton vs. anti-proton v_2 and other puzzles
• Dilepton production in proton-proton and Pb+Pb collisions at sqrt(s_NN)=2.76 TeV
• A hybrid model approach for strange and multi-strange hadrons in 2.76 A TeV Pb+Pb collisions
• Anisotropic flow in transport+hydrodynamics hybrid approaches
• Shear viscosity of hadrons with K-matrix cross sections
• UrQMD calculations of two-pion HBT correlations in central Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV
• Heavy quark transport at RHIC and LHC
• Correlated wounded hot spots in proton-proton interactions
• Extraction of the sound velocity from rapidity spectra: Evidence for QGP formation at FAIR/RHIC-BES energies
• Differential two-particle number and momentum correlations with the AMPT, UrQMD, and EPOS models in Pb-Pb collisions at $\sqrt{{\text{s}}_{{}_{\mathrm{NN}}}}$= 2.76 TeV
• Forced canonical thermalization in a hadronic transport approach at high density
• Description of bulk observables in Au+Au collisions at top RHIC energy in the integrated HydroKinetic Model
• Femtoscopy scales and particle production in the relativistic heavy ion collisions from Au+Au at 200 AGeV to Xe+Xe at 5.44 ATeV within the integrated hydrokinetic model
• UrQMD calculations of two-pion HBT correlations in p+p and Pb+Pb collisions at LHC energies
• Two-particle transverse momentum correlations in pp and p-Pb collisions at energies available at the CERN Large Hadron Collider
• Space-time structure of particle emission and femtoscopy scales in ultrarelativistic heavy-ion collisions