Charmed particles production in pA -interactions at √ s = 11.8 GeV

. The results of the SERP-E-184 experiment at the U-70 accelerator (IHEP, Protvino) are presented. Interactions of the 70GeV proton beam with carbon, silicon and lead targets were studied to detect decays of charmed D^0 , D̅^0 , D^+ , D^- mesons and Λ_c^+ baryon near their production threshold. Measurements of lifetimes and masses have shown a good agreement with PDG data. The inclusive cross-sections of charm production and their A -dependences have been obtained. The yields of these particles are compared with the theoretical predictions and the data of other experiments. The measured cross-section of the total open charm production ( σ_ tot(cc̅) = 7.1 ± 2.3( stat) ± 1.4( syst) μb/nucleon) at the collision c.m. energy √ s = 11.8 GeV is well above the QCD model predictions. The contributions of different kinds of charmed particles to the total cross-section of the open charm production in proton-nucleus interactions vary with energy.