Speaker
Description
Direct photons are unique probes to study both the thermal and collective properties of the Quark Gluon Plasma (QGP). PHENIX has discovered a large excess of the direct photon yield as well as a large azimuthal anisotropy at the low $p_{T}$ region in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV$/c^{2}$. The two observations of large yield and anisotropy are quite challenging for the current theoretical models to reconcile simultaneously. To provide more constrains and insights to the theoretical picture, PHENIX is making a more precise measurements for both yield and anisotropy using the high statistics data sample of Au+Au collisions taken in 2014, where photons are reconstructed via conversions to $e^{+}e^{-}$ pairs. As evidence mounts for a collective behavior in small systems, PHENIX also measured the direct photon production in p+Au collisions to see if there is any thermal signal in small systems. In this poster we will present the updated result on direct photon yields and azimuthal anisotropies $v_{2}$ and $v_{3}$ in Au+Au collisions at 200 GeV$/c^{2}$ and the status of direct photon yields in p+Au collisions at the same beam energy.
| Content type | Experiment |
|---|---|
| Collaboration | PHENIX |
| Centralised submission by Collaboration | Presenter name already specified |
