Possible resolution to the direct photon puzzle
KMI Science Symposia (ES635)
Since the discovery of strongly interacting QGP at RHIC, the research of sQGP has been actively conducting from experimental and theoretical sides. However still the details of the sQGP property are under discussion; temperature dependence of shear and bulk viscosities of it and so on. Besides, a lot of experimental data at RHIC and LHC are still waiting for explanation from theoretical models. One of them is the direct photon puzzle: currently there are no theoretical models which can explain both of yields and large elliptic flow of direct photon at the same time. I will show a possible resolution to the direct photon puzzle, using the extended the recombination model.