Interferometry of Direct Photons in Central 280Pb+208Pb Collisions at 158A GeV
Abstract
Two-particle correlations of direct photons were measured in central 208Pb+208Pb collisions at 158 AGeV. The invariant interferometric radii were extracted for 100<KT<300 MeV/c and compared to radii extracted from charged pion correlations. The yield of soft direct photons, KT<300 MeV/c, was extracted from the correlation strength and compared to theoretical calculations.
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