Direct photons at low $p_T$ measured in PHENIX

Abstract

Direct photon spectra measured at small $p_T$ in p+p, d+Au and Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV are presented. Several measurement techniques including statistical subtraction, tagging, and internal and external conversion were applied and found to produce consistent results. The p+p and d+Au results are found to be in very good agreement with pQCD predictions over the entire $p_T$ range. No excess of direct photons in Au+Au collisions with respect to binary scaled d+Au data is observed within systematic errors.

4 pages, 3 figures, proceedings for Quark Matter 2006

References in corpus (1)

• Measurement of direct photon production in p + p collisions at sqrt(s) = 200 GeV

Cited by in corpus (1)

• Direct photons ~basis for characterizing heavy ion collisions~