Thermal photons in QGP and non-ideal effects
arXiv:1011.1969 · doi:10.1007/JHEP11(2010)106
Abstract
We investigate the thermal photon production-rates using one dimensional boost-invariant second order relativistic hydrodynamics to find proper time evolution of the energy density and the temperature. The effect of bulk-viscosity and non-ideal equation of state are taken into account in a manner consistent with recent lattice QCD estimates. It is shown that the \textit{non-ideal} gas equation of state i.e behaviour of the expanding plasma, which is important near the phase-transition point, can significantly slow down the hydrodynamic expansion and thereby increase the photon production-rates. Inclusion of the bulk viscosity may also have similar effect on the hydrodynamic evolution. However the effect of bulk viscosity is shown to be significantly lower than the \textit{non-ideal} gas equation of state. We also analyze the interesting phenomenon of bulk viscosity induced cavitation making the hydrodynamical description invalid. We include the viscous corrections to the distribution functions while calculating the photon spectra. It is shown that ignoring the cavitation phenomenon can lead to erroneous estimation of the photon flux.
arXiv comment11 pages, 13 figures; accepted for publication in JHEP
References in corpus (54)
- Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
- Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
- Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
- The PHOBOS Perspective on Discoveries at RHIC
- Nonlinear Fluid Dynamics from Gravity
- Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
- Conformal Relativistic Viscous Hydrodynamics: Applications to RHIC results at sqrt(s_NN) = 200 GeV
- Relativistic viscous hydrodynamics, conformal invariance, and holography
- The Effect of Shear Viscosity on Spectra, Elliptic Flow, and HBT Radii
- Equation of state and QCD transition at finite temperature
- New Developments in Relativistic Viscous Hydrodynamics
- Causal viscous hydrodynamics in 2+1 dimensions for relativistic heavy-ion collisions
- Nearly Perfect Fluidity: From Cold Atomic Gases to Hot Quark Gluon Plasmas
- A calculation of the bulk viscosity in SU(3) gluodynamics
- Photon Emission from Ultrarelativistic Plasmas
- Simulating elliptic flow with viscous hydrodynamics
- Universal properties of bulk viscosity near the QCD phase transition
- System Size, Energy, Pseudorapidity, and Centrality Dependence of Elliptic Flow
- Perfect Fluidity of the Quark Gluon Plasma Core as Seen through its Dissipative Hadronic Corona
- Second Order Dissipative Fluid Dynamics for Ultra-Relativistic Nuclear Collisions
- Dissipative Hydrodynamics and Heavy Ion Collisions
- Centrality dependence of charged hadron and strange hadron elliptic flow from sqrt(s_NN) = 200 GeV Au+Au collisions
- Bulk and shear viscosities of matter created in relativistic heavy-ion collisions
- Bremsstrahlung and photon production in thermal QCD
- Dissipative hydrodynamics for viscous relativistic fluids
- Bulk viscosity of QCD matter near the critical temperature
- Extracting the QGP viscosity from RHIC data -- a status report from viscous hydrodynamics
- Causal hydrodynamics of gauge theory plasmas from AdS/CFT duality
- Effects of Bulk Viscosity at Freezeout
- Viscous Hydrodynamic Predictions for Nuclear Collisions at the LHC
- Spectral sum rules for the quark-gluon plasma
- Effect of bulk viscosity on Elliptic Flow near QCD phase transition
- Bulk viscosity in quasi particle models
- Thermal Photons and Lepton Pairs from Quark Gluon Plasma and Hot Hadronic Matter
- Bulk viscosity and spectral functions in QCD
- Asymptotics of thermal spectral functions
- Causal Viscous Hydrodynamics for Central Heavy-Ion Collisions
- Direct Photons from Relativistic Heavy-Ion Collisions
- Relativistic Dynamics of Non-ideal Fluids: Viscous and heat-conducting fluids I. General Aspects and 3+1 Formulation for Nuclear Collisions
- Bulk Viscosity and Cavitation in Boost-Invariant Hydrodynamic Expansion
- Hard Thermal Photon Production in Relativistic Heavy Ion Collisions
- Dissipative effects from transport and viscous hydrodynamics
- Photon Emission from a Parton Gas at Chemical Non-Equilibrium
- Hard photon production rate of a quark-gluon plasma at finite quark chemical potential
- Photons as a viscometer of heavy ion collisions
- Stress Tensor and Bulk Viscosity in Relativistic Nuclear Collisions
- Damping Rate of a Hard Photon in a Relativistic Plasma
- Direct photons from relativistic heavy-ion collisions
- Evolution of Hot, Dissipative Quark Matter in Relativistic Nuclear Collisions
- Giant Gravitons with NSNS B field
- Electromagnetic radiation from relativistic nuclear collisions
- Photon emission from out of equilibrium dissipative parton plasma
- Viscous relativistic hydrodynamics
- A Systematic Study on Direct Photon Production from Central Heavy Ion Collisions
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