Production of delta isobars on tantalum nuclei in CTa collisions at a projectile momentum of 4.2 GeV/c per nucleon
Аннотация
A procedure that relies on analyzing the angle between the momenta of the proton and the pion originating from CTa interaction at a projectile momentum of 4.2 GeV/c per nucleon was used to investigate for the first time the production of Δ0 and Δ++ resonances in such interactions and to determine their parameters. The criterion of stability in the parameter a characterizing the background contribution was presented for the first time and was used to reconstruct the mass distributions of Δ0 and Δ++ resonances. The contributions of Δ0- and Δ++-resonance decays to the production of charged pions were estimated. The results of this study are compared with similar data obtained by using the analogous procedure for Δ0 and Δ++ resonances produced on carbon nuclei in CC and 4HeC collisions at a projectile momentum of 4.2 GeV/c per nucleon and in π −12C interactions at a projectile momentum of 40 GeV/c.