Anisotropy of Low Energy Direct Photons in Relativistic Heavy Ion Collisions

Abstract

We investigate the behavior of low energy photons radiated by the deceleration processes of two colliding nuclei in relativistic heavy ion collisions using the Wigner function approach for electromagnetic radiation fields. The angular distribution reveals the information of the initial geometric configurations. Such a property is reflected in the anisotropic parameter $v_2$, showing an increasing $v_2$ as energy decreases, which is a behavior qualitatively different from $v_2$ from hadrons produced in the collisions.

arXiv comment7 pages,5 figures, one reference was added, accepted for publication in J. Phys. G

References in corpus (16)

• The production of photons in relativistic heavy-ion collisions
• Hydrodynamic Approaches in Relativistic Heavy Ion Reactions
• Effective QCD and transport description of dilepton and photon production in heavy-ion collisions and elementary processes
• Production and Elliptic Flow of Dileptons and Photons in the semi-Quark Gluon Plasma
• Anisotropic flow of thermal photons as a quark-gluon plasma viscometer
• Dilepton production and reaction dynamics in heavy-ion collisions at SIS energies from coarse-grained transport simulations
• Enhancement of thermal photon production in event-by-event hydrodynamics
• Hydrodynamic construction of the electromagnetic field
• Direct photon production from viscous QGP
• Nucleus-Nucleus Bremsstrahlung from Ultrarelativistic Collisions
• Unruh gamma radiation at RHIC?
• Imaging the Space-Time Evolution of High Energy Nucleus-Nucleus Collisions with Bremsstrahlung
• Illusory Flow in Radiation from Accelerating Charge
• Elliptic flow due to radiation in heavy-ion collisions
• Coherent photon bremsstrahlung and dynamics of heavy-ion collisions: comparison of different models
• Multipole Expansion of Bremsstrahlung in Intermediate Energy Heavy Ion Collisions

Cited by in corpus (9)

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• Prompt photon yield and elliptic flow from gluon fusion induced by magnetic fields in relativistic heavy-ion collisions
• Prompt, pre-equilibrium, and thermal photons in relativistic nuclear collisions
• Direct Photons in Hydrodynamic Modeling of Relativistic Nuclear Collisions
• Photon and dilepton emission anisotropy for a magnetized quark-gluon plasma
• Low-energy Bremsstrahlung photon in relativistic nucleon+nucleon collisions
• Hydrodynamic model of heavy-ion collisions with low momentum components