Viscous photons in relativistic heavy ion collisions

Details Viscous photons in relativistic heavy ion collisions Viscous photons in relativistic heavy ion collisions

2011-09-20

arxiv.org/abs/1109.4405v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 12 figures. References updated and discussion added

Scientific paper

Theoretical studies of the production of real thermal photons in relativistic heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) are performed. The space-time evolution of the colliding system is modelled using MUSIC, a 3+1D relativistic hydrodynamic simulation, using both its ideal and viscous versions. The inclusive spectrum and its azimuthal angular anisotropy are studied separately, and the relative contributions of the different photon sources are highlighted. It is shown that the photon v2 coefficient is especially sensitive to the details of the microscopic dynamics like the equation of state, the ratio of shear viscosity over entropy density, eta/s, and to the morphology of the initial state.

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