The possibility of separating the π0,η,ω and Ks0​ meson
background from the signal photons produced directly in pp collisions is
analyzed. The rejection factors for two pseudorapidity regions 0.4<\eta<1.0and1.6<η<2.0 and six Et values, 20, 40, 60, 80, 100 and 200 GeV, are
calculated for a case when only the calorimeter information is used. The cases
of η,ω and Ks0​ mesons decaying through the neutral and charged
channels are considered separately.Comment: 17 pages, uses cernrep.cls style fil