Measurement of image and γ in d+Au collisions at image by PHENIX experiment Original Research Article

Previous results indicated that high pT particle suppression in Au+Au interactions is a final state effect, since RdA ratios were compatible with unity, albeit within large experimental errors. It is important to test this conclusion to higher precision since the modification of structure functions may be involved. Recent d+Au data taken in 2008 improve the integrated luminosity by about a factor of thirty compared to the 2003 data. A more precise measurement of both π0 and γ at higher pT will shed new light on whether the initial state in the heavy nuclei is modified.