Measurement of photons via conversion pairs in Au+Au collisions at sqrt(s_NN) = 200 GeV with the PHENIX experiment at RHIC

2007/11/26 by Dahms, Torsten
#FOS: Physical sciences #Nuclear Experiment (nucl-ex)

paper · doi:10.48550/arxiv.0711.4145

Abstract

Thermal photons can provide information on the temperature of the new state of matter created at RHIC. In the p_T region of 1--3 GeV/c thermal photons are expected to be the dominant direct photon source. Therefore, a possible excess compared to a pure decay photon signal due to a thermal photon contribution should be seen in the double ratio (gamma/gamma(pi⁰))_Measured/(gamma/gamma(pi⁰))_Simulated, if sufficient accuracy can be reached. We present a method to reconstruct direct photons by measuring e⁺e^- pairs from external photon conversions.

Related

• Direct Photons at RHIC
• Direct Photons at RHIC
• Thermal photon measurements at PHENIX
• Direct Photons and Photon-Hadron Correlations at PHENIX
• Search for Direct Photons from √s_NN=200GeV AuAu Collisions Using a New π⁰ Tagging Method in the PHENIX Experiment at RHIC