Thermal photons from fluctuating initial conditions

Details Thermal photons from fluctuating initial conditions Thermal photons from fluctuating initial conditions

2011-06-20

arxiv.org/abs/1106.3884v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

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.

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