Thermal photons from fluctuating initial conditions

Abstract

Event-by-event fluctuations of initial QCD-matter density produced in heavy-ion collisions at RHIC enhance the production of thermal photons significantly in the region $2\le p_T\le 4$ GeV/$c$ compared to a smooth initial-state averaged profile in the ideal hydrodynamic calculation. This enhancement is a an early time effect due to the presence of hotspots or over-dense regions in the fluctuating initial state. The effect of fluctuations is found to be stronger in peripheral than in central collisions.

4 pages, 3 figures. Talk given at Quark Matter 2011, 22-28 May 2011, Annecy, France

References in corpus (3)

• Event-by-event hydrodynamics and elliptic flow from fluctuating initial state
• Enhancement of thermal photon production in event-by-event hydrodynamics
• Elliptic flow from event-by-event hydrodynamics

Cited by in corpus (12)

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• Collision centrality and ${\tau }_0$ dependence of the emission of thermal photons from fluctuating initial state in ideal hydrodynamic calculation
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• Spectra and elliptic flow of thermal photons from full overlap U+U collisions at RHIC
• Triangular flow of thermal photons from an event-by-event hydrodynamic model for 2.76A TeV Pb+Pb collisions at LHC
• Photon production from Pb+Pb collisions at {$\sqrt{s_{\mathrm{NN}}}$} = 5.02 TeV at LHC and at {$\sqrt{s_{\mathrm{NN}}}$} = 39 TeV at FCC
• Directed flow of photons in Cu+Au collisions at RHIC
• Effect of initial-state nucleon shadowing on the elliptic flow of thermal photons
• Ratio of photon anisotropic flow in relativistic heavy ion collisions
• Thermal photon $v_3$ at LHC from fluctuating initial conditions
• Iterative Fluiddynamics
• Influence of initial state fluctuations on the production of thermal photons