| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5493859 | Nuclear and Particle Physics Proceedings | 2016 | 4 Pages |
Abstract
The transverse momentum distribution and azimuthal anisotropy of direct photon production in Au+Au collisions at sNN=200Â GeV were measured in the PHENIX experiment at RHIC. Through the external conversion method, earlier yield and v2 measurements were extended down to pT = 0.4 GeV/c. For the first time the third order Fourier coefficient, v3 was measured. The yield shows a large, exponential excess above prompt photon production. v2 is consistent with that of hadrons at low pT. v3 is about 50% the size of v2. Current models cannot describe simultaneously the large observed yield and azimuthal anisotropy.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Stefan Bathe, PHENIX Collaboration PHENIX Collaboration,