Multiplicity and pseudorapidity distribution of photons in S+Au reaction at200AGeV

The photon multiplicity has been measured for the first time in S+Au collisions at $200A$ GeV over a wide pseudorapidity range $(2.8\mathrm{}<~\eta <~5.2)$ employing a fine granularity preshower detector. The pseudorapidity density of photons increases with centrality, reaching $\sim 200$ at the highest centrality studied. The results are compared with measurements of the charged particle multiplicity and with predictions of the VENUS event generator.