Direct photon production in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV at STAR

Abstract

We present the direct photon production for $1<p_T<10$ GeV/$c$ derived from continuum in the dielectron invariant mass region $0.1<M_{ee}<0.3$ GeV/$c^2$ from one billion $\sqrt{s_{NN}}=200$ GeV Au+Au events taken in year 2010 and 2011. A clear excess in the invariant yield compared to the number of binary collision scaled $p+p$ reference is observed in the \pt~range 1-4 GeV/$c$. Model calculations with contributions from thermal radiation and initial hard parton scattering are consistent within uncertainties with the direct photon invariant yield.

4 pages, 5 figures, QM2014 proceedings

References in corpus (4)

• Measurement of direct photon production in p + p collisions at sqrt(s) = 200 GeV
• Dielectron Mass Spectra from Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV
• Di-electron spectrum at mid-rapidity in $p+p$ collisions at $\sqrt{s}=200$ GeV
• Dielectron production in 200 GeV p+p and Au+Au collisions at STAR

Cited by in corpus (8)

• An Overview of STAR Experimental Results
• Universal Parametrization of Thermal Photon Rates in Hadronic Matter
• Thermal photon emission from the pi-rho-omega system
• Measurement of dielectron production in central Pb-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}$ = 2.76 TeV
• Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion Collisions
• Beam Energy Dependence of Dielectron Production in Au+Au Collisions from STAR at RHIC
• The low and intermediate mass dilepton and photon results
• Predictions for the isolated prompt photon production at the LHC at $\sqrt{s}=$13 TeV