Thermal photon to dilepton ratio in ultra-relativistic heavy ion collisions

Details Thermal photon to dilepton ratio in ultra-relativistic heavy ion collisions Thermal photon to dilepton ratio in ultra-relativistic heavy ion collisions

2007-05-11

arxiv.org/abs/0705.1591v2

Phys.Rev.C78:034903,2008

Physics

Nuclear Physics

Nuclear Theory

9 pages with 11 eps figures

Scientific paper

10.1103/PhysRevC.78.034903

The ratio of transverse momentum distribution of thermal photons to dilepton has been evaluated. It is observed that this ratio reaches a plateau beyond a certain value of transverse momentum. We argue that this ratio can be used to estimate the initial temperature of the system by selecting the transverse momentum and invariance mass windows judiciously. It is demonstrated that if the radial flow is large then the plateau disappear and hence a deviation from the plateau can be used as an indicator of large radial flow. The sensitivity of the results on various input parameters has been studied.

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