Measuring initial temperature through photon to dilepton ratio in heavy ion collision

Abstract

Theoretical calculation of transverse momentum($p_T$) distribution of thermal photons and dileptons originating from ultra-relativistic heavy ion collisions suffer from several uncertainties since the evaluation of these spectra needs various inputs which are not yet known unambiguously. In the present work the ratio of the $p_T$ spectra of thermal photons to lepton pairs has been evaluated and it is shown that the ratio is insensitive to some of these parameters.

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References in corpus (14)

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Cited by in corpus (8)

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• Excitation function of initial temperature of heavy flavor quarkonium emission source in high energy collisions
• Initial- and final-state temperatures of emission source from differential cross-section in squared momentum transfer in high energy collisions
• Electromagnetic signals from Au+Au collisions at RHIC energy, $\sqrt{s_{NN}}$=200 GeV and Pb+Pb collisions at LHC energy, $\sqrt{s_{NN}}$=2.76 TeV
• Excitation functions of related temperatures of η and η0 emission sources from squared momentum transfer spectra in high-energy collisions
• Hydrodynamic description of direct photon spectra and elliptic flow in Pb+Pb collisions at LHC