ENERGY AND SYSTEM SIZE DEPENDENCE OF PHOTON PRODUCTION AT FORWARD RAPIDITIES AT RHIC

The energy and system size dependence of pseudorapidity (η) and multiplicity distributions of photons are measured in the region −2.3 ≤ η ≤ −3.7 for Cu + Cu collisions at [Formula: see text] and 62.4 GeV. Photon multiplicity measurements at forward rapidity have been carried out using a Photon Multiplicity Detector (PMD) in the STAR experiment. Photons are found to follow longitudinal scaling for Cu + Cu collisions for 0–10% centrality. A Comparison of pseudorapidity distributions with HIIJING model is also presented.