Photon production and elliptic flow from momentum-anisotropic quark-gluon plasma

Abstract

The emission of real photons from a momentum-anisotropic quark-gluon plasma (QGP) is affected by both the collective flow of the radiating medium and the modification of local rest frame emission rate due to the anisotropic momentum distribution of partonic degrees of freedom. In this paper, we first calculate the photon production rate from an ellipsoidally momentum-anisotropic QGP including hard contributions from Compton scattering and quark pair annihilation and soft contribution calculated using the hard thermal loop (HTL) approximation. We introduce a parametrization of the nonequilibrium rate in order to facilitate its further application in yield and flow calculations. We convolve the anisotropic photon rate with the space-time evolution of QGP provided by 3+1d anisotropic hydrodynamics (aHydro) to obtain the yield and the elliptic flow coefficient $v_2$ of photons from QGP generated at Pb-Pb collisions at LHC at 2.76 TeV and Au-Au collisions at RHIC at 200 GeV. We investigate the effects of various parameters on the results. In particular we analyze the sensitivity of results to initial momentum anisotropy.

arXiv comment19 pages, 10 figures

References in corpus (76)

• Photon Emission from Quark-Gluon Plasma: Complete Leading Order Results
• Collective Modes of an Anisotropic Quark-Gluon Plasma
• The production of photons in relativistic heavy-ion collisions
• Dissipative Dynamics of Highly Anisotropic Systems
• Hadronic Production of Thermal Photons
• Highly-anisotropic and strongly-dissipative hydrodynamics for early stages of relativistic heavy-ion collisions
• High energy photons from passage of jets through quark gluon plasma
• Conformal anomaly as a source of soft photons in heavy ion collisions
• Hard Loop Approach to Anisotropic Systems
• Thermal Photons and Collective Flow at the Relativistic Heavy-Ion Collider
• The anisotropic non-equilibrium hydrodynamic attractor
• Next-to-leading order thermal photon production in a weakly coupled quark-gluon plasma
• Anisotropic Hydrodynamics: Three lectures
• Elliptic flow of thermal photons in relativistic nuclear collisions
• Azimuthally anisotropic emission of low-momentum direct photons in Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Relativistic anisotropic hydrodynamics
• Pseudo-Critical Enhancement of Thermal Photons in Relativistic Heavy-Ion Collisions
• Production and Elliptic Flow of Dileptons and Photons in the semi-Quark Gluon Plasma
• Photon production from an anisotropic quark-gluon plasma
• The non-equilibrium attractor for kinetic theory in relaxation time approximation
• Viscous photons in relativistic heavy ion collisions
• Exact solution of the (0+1)-dimensional Boltzmann equation for a massive gas
• Hadronic and partonic sources of direct photons in relativistic heavy-ion collisions
• 3+1d quasiparticle anisotropic hydrodynamics for ultrarelativistic heavy-ion collisions
• Anisotropic flow of thermal photons as a quark-gluon plasma viscometer
• Bulk viscous evolution within anisotropic hydrodynamics
• Direct real photons in relativistic heavy ion collisions
• Hard Thermal Photon Production in Relativistic Heavy Ion Collisions
• Elliptic flow of thermal photons from event-by-event hydrodynamic model
• Azimuthal Asymmetry of Direct Photons in High Energy Nuclear Collisions
• Elliptic flow from thermal photons with magnetic field in holography
• Parametric estimate of the relative photon yields from the Glasma and the Quark-Gluon Plasma in heavy-ion collisions
• Pion and thermal photon spectra as a possible signal for a phase transition
• Probing gluon saturation with next-to-leading order photon production at central rapidities in proton-nucleus collisions
• Wess-Zumino-Witten action and photons from the Chiral Magnetic Effect
• Anisotropic hydrodynamic modeling of 2.76 TeV Pb-Pb collisions
• Lattice constraints on the thermal photon rate
• Thermal photon $v_2$ with slow quark chemical equilibration
• Beam-energy and centrality dependence of direct-photon emission from ultra-relativistic heavy-ion collisions
• Direct photon elliptic flow in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Thermal photon production rate from non-equilibrium quantum field theory
• Universal Parametrization of Thermal Photon Rates in Hadronic Matter
• Fermionic Collective Modes of an Anisotropic Quark-Gluon Plasma
• Dilepton/Photon Production in Heavy Ion Collisions and the QCD Phase Transition
• Photon Emission from a Momentum Anisotropic Quark-Gluon Plasma
• Production of Forward Rapidity Photons in High Energy Heavy Ion Collisions
• Thermal photons from heavy ion collisions: A spectral function approach
• The Magneto-Sono-Luminescence and its signatures in photon and dilepton production in heavy ion collisions
• Centrality Dependence of Direct Photons in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• On the role of magnetic field in photon excess in heavy ion collisions
• Electromagnetic radiation as a probe of the initial state and of viscous dynamics in relativistic nuclear collisions
• Photon production from a non-equilibrium quark-gluon plasma
• Prompt photon yield and elliptic flow from gluon fusion induced by magnetic fields in relativistic heavy-ion collisions
• Dilepton and photon production in the presence of a nontrivial Polyakov loop
• Photons from the Early Stages of Relativistic Heavy Ion Collisions
• Elliptic flow of thermal photons in heavy-ion collisions at Relativistic Heavy Ion Collider and Large Hadron Collider
• Thermal photon production in high-energy nuclear collisions
• Anisotropic hydrodynamic modeling of 200 GeV Au-Au collisions
• Holographic Photon Production in Heavy Ion Collisions
• A Tale of Tails: Photon Rates and Flow in Ultra-Relativistic Heavy Ion Collisions
• Dilepton production and elliptic flow from an anisotropic quark-gluon plasma
• Photon emission from quark-gluon plasma out of equilibrium
• Anisotropic hydrodynamics for conformal Gubser flow
• Testing different formulations of leading-order anisotropic hydrodynamics
• Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion Collisions
• Direct Photon Elliptic Flow at BNL Relativistic Heavy Ion Collider (RHIC) and CERN Large Hadron Collider (LHC)
• Prompt, pre-equilibrium, and thermal photons in relativistic nuclear collisions
• Virtual photon polarization in ultrarelativistic heavy-ion collisions
• The low and intermediate mass dilepton and photon results
• Parton self-energies for general momentum-space anisotropy
• Photons from thermalizing matter in heavy ion collisions
• Quark self-energy in an ellipsoidally anisotropic quark-gluon plasma
• PHENIX measurements of low momentum direct photon radiation
• Effective distributions of quasi-particles for thermal photons
• Effect of initial-state nucleon shadowing on the elliptic flow of thermal photons
• Photon and dilepton production in high energy heavy ion collisions

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• Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background I: The two-gluon one-photon vertex
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• Direct Photons in Hydrodynamic Modeling of Relativistic Nuclear Collisions
• Covariant formulation of gluon self-energy in presence of ellipsoidal anisotropy
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