Photon spectra and anisotropic flow in heavy ion collisions at the top RHIC energy within the integrated hydrokinetic model with photon hadronization emission

Abstract

The integrated HydroKinetic Model (iHKM) is applied to analyse the results of direct photon spectra as well as elliptic and triangular flow measurements in 200A GeV Au+Au collisions at RHIC for different centrality bins. Experiments detect the strong centrality dependence of photon elliptic and triangular flow as increasing $v_n(p_T)$-coefficients towards peripheral collisions. The photon production in the model is accumulated from the different sources along with the process of relativistic heavy ion collision developing. Those include the primary hard photons from the parton collisions at the very early stage of the process, the photons generated at the pre-thermal phase of dense matter evolution, then thermal photons at partially equilibrated hydrodynamic quark-gluon stage, together with radiation displaying a confinement and, finally, from the hadron gas phase. Along the way a hadronic medium evolution is treated in two distinct, in a sense opposite, approaches: chemically equilibrium and chemically non-equilibrium, namely, chemically frozen expansion. We find the description of direct photon spectra, elliptic and triangular flow are significantly improved, similar to that found in iHKM for the LHC energies, if an additional portion of photon radiation associated with the confinement processes, the "hadronization photons", is included into consideration.

arXiv comment28 pages, 11 figures. arXiv admin note: substantial text overlap with arXiv:1812.02763

References in corpus (45)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• The equation of state in (2+1)-flavor QCD
• Centrality determination of Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV with ALICE
• Quark mass thresholds in QCD thermodynamics
• The production of photons in relativistic heavy-ion collisions
• Hadronic Production of Thermal Photons
• Direct photon production in Pb-Pb collisions at $\sqrt{s_\rm{NN}}$ = 2.76 TeV
• A new critical study of photon production in hadronic collisions
• Observation of direct-photon collective flow in sqrt(s_NN)=200 GeV Au+Au collisions
• Particlization in hybrid models
• GLISSANDO: GLauber Initial-State Simulation AND mOre
• Measurement of isolated photon production in pp and PbPb collisions at sqrt(sNN) = 2.76 TeV
• GLISSANDO 2: GLauber Initial-State Simulation AND mOre..., ver. 2
• Azimuthally anisotropic emission of low-momentum direct photons in Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Pseudo-Critical Enhancement of Thermal Photons in Relativistic Heavy-Ion Collisions
• Uniform description of bulk observables in the hydrokinetic model of A+A collisions at RHIC and LHC
• Elliptic flow of thermal photons from event-by-event hydrodynamic model
• Centrality, rapidity and transverse momentum dependence of isolated prompt photon production in lead-lead collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV measured with the ATLAS detector
• KLN theorem, magnetic mass, and thermal photon production
• Universal Parametrization of Thermal Photon Rates in Hadronic Matter
• Hydro-kinetic approach to relativistic heavy ion collisions
• Comparison of space-time evolutions of hot/dense matter in $\sqrt{s_{NN}}$=17 and 130 GeV relativistic heavy ion collisions based on a hydrodynamical model
• Kaon femtoscopy in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Femtoscopy correlations of kaons in $Pb+Pb$ collisions at LHC within hydrokinetic model
• Kaon and pion femtoscopy at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC) in a hydrokinetic model
• Thermal photon emission from the pi-rho-omega system
• Self-consistent conversion of a viscous fluid to particles
• Anomalous soft photon production from the induced currents in Dirac sea
• Photon production from gluon mediated quark-anti-quark annihilation at confinement
• Initialization of hydrodynamics in relativistic heavy ion collisions with an energy-momentum transport model
• On $m_T$ dependence of femtoscopy scales for meson and baryon pairs
• Direct Photon Elliptic Flow at BNL Relativistic Heavy Ion Collider (RHIC) and CERN Large Hadron Collider (LHC)
• Towards azimuthal anisotropy of direct photons
• Accounting for backflow in hydrodynamic-simulation interfaces
• $K^{\ast }(892)$ and $\varphi (1020)$ production and their decay into the hadronic medium at the Large Hadron Collider
• Matching of nonthermal initial conditions and hydrodynamic stage in ultrarelativistic heavy-ion collisions
• Bulk observables in the LHC 5.02 TeV Pb+Pb collisions within the integrated HydroKinetic Model
• Triangular flow of thermal photons from an event-by-event hydrodynamic model for 2.76A TeV Pb+Pb collisions at LHC
• PHENIX measurements of low momentum direct photon radiation
• Description of bulk observables in Au+Au collisions at top RHIC energy in the integrated HydroKinetic Model
• Direct photon spectrum and elliptic flow produced from Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV at the CERN Large Hadron Collider within an integrated hydrokinetic model
• Electromagnetic recombination spectra at the quark-hadron phase transition
• Particle production at energies available at the CERN Large Hadron Collider within evolutionary model
• Parton to Hadron Fragmentation Function from Quark-Gluon Plasma using Lattice QCD Method at Finite Temperature

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