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Photon emission in Pb+Pb collisions at SpS and LHC

Abstract

Yield of direct photons in Pb+Pb collisions at SpS and LHC energy is evaluated with emphasis on estimate of possible uncertainty. Possibility of experimental observation of direct photons at LHC is discussed. Predictions of several models at SpS energy are compared with experimental data.Comment: 19 pages, 13 figure

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