γ production and multiplicity correlations between neutral and charged pions in pp interactions at 69 GeV/c

From 3500 γ's observed in the 4.7 m HBC MIRABELLE at Sepukhov, we obtain the dependence on n− of the average number of produced π0,s, 〈n0〉, and the π0π0 correlation parameter, ƒ200. We present also the ƒ2−− and ƒ2+0 parameters and information concerning KNO scaling. Various momentum distributions are given. The invariant γ cross sections distributions are compared with corresponding data at other energies.