Inclusive Isolated Photon in pp Collisions up to the Next Leading Order with CGC

We make a brief overview of various photons observed in hadronic collision experiments. We particularly focus on the isolated photon among them, and discuss how the gluon saturation affects the photon production mechanism in a system of dense target and dilute projectile. We present our results taking account of the gluon saturation in a form of the color glass condensate.