Leading Hadron Production in d+Au and 3He+Au collisions in the PHENIX experiment

Neutral pions have been measured in 3He+Au collisions at sNN=200 GeV up to 20 GeV/c in the RHIC Year-2014 run. The nuclear modification factor RAA was measured and compared with that from d+Au collisions. The integrated RAA as a function of Npart was calculated for d+Au, 3He+Au and Au+Au collisions at sNN=200 GeV, and found to converge for Npart>12, while a clear system ordering RdAu>RHeAu>RAuAu was observed for Npart>12. The fractional momentum loss for the most central 3He+Au collisions was also estimated.