Speaker
Mr
Sanshiro Mizuno
(University of Tsukuba, RIKEN (JP))
Description
Due to small cross section in the QGP direct photons preserve information about different stages of the heavy ion collisions.
Therefore, detailed measurement of direct photons can be considered as a powerful probe to study QGP physics.
Photons have different angular emission patterns depending on their production mechanism.
The second order azimuthal anisotropy ($v_{2}$) of direct photons is measured at PHENIX, and none-zero positive $v_{2}$, comparable to that of hadrons, is observed at low $p_{T}$.
The production mechanism of the positive $v_{2}$ has not yet been well understood, and the third order azimuthal anisotropy ($v_{3}$) of direct photons has been expected to provide additional constrains for theoretical models.
We report the current results of direct photon $v_{2}$ and $v_{3}$ in Au+Au $\sqrt{s_{NN}}$=200GeV collisions at PHENIX.
Author
Mr
Sanshiro Mizuno
(University of Tsukuba, RIKEN (JP))
