Open AccessDirect photon measurements in He+Au collisions at 200 GeV
Author(s) -
A. Berdnikov,
Y. Berdnikov,
D. Kotov,
В. Н. Соловьев
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1400/5/055053
Subject(s) - photon , physics , nuclear physics , optics
The PHENIX experiment has published direct photon yields from different collisions at RHIC energies and discovered a large excess of low- p T direct photons in Au+Au collisions at N s N = 200 GeV compared to reference p+p collisions, which has been attributed to thermal radiation from the hot and dense medium. PHENIX has also developed a new technique to identify conversion photons without assuming the radius where the conversion happened. This method greatly increases the available statistics and reduces systematic uncertainties. This paper presents the results obtained from real photons in the electromagnetic calorimeter and photons converted at the layers of Silicon Vertex Tracker (VTX).