$R_{CP}$ measurement at forward rapidities with muons from light meson decays in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV in the PHENIX experiment at RHIC

We study high pT light meson production at forward rapidity as a function of centrality in Au-Au collisions. It is expected that the energy and parton density of the fireball created in Au-Au collisions would be smaller at a larger rapidity, thus reducing the “jet quenching effects” observed at central rapidity for light mesons. On the other hand, gluon saturation models predict a suppression of particle yields at small x, or at a large rapidity, for a given pT. We perform a quantitative analysis of the nuclear modification factor $R_{CP}$ for high pT light mesons at forward rapidities in Au+Au collision at $\sqrt{s_{NN}}$=200 GeV. Light meson yields are measured in the PHENIX muon spectrometers through their decay muons. The latest results from this analysis will be presented.