Production of Δ0(1232)-resonances in p + 12C collisions at a momentum of 4.2 GeV/c

The production of Δ0(1232)-resonances in p + 12C collisions at 4.2 GeV/c was investigated with 4π acceptance. The masses and widths of the resonances were obtained from ananalysis of foreground and background invariant-mass distributions of pπ− pairs obtained using an angular criterion. The fraction of charged π−-mesons coming from the Δ0(1232) decay was estimated and compared to those obtained in earlier analyses. The momentum, transverse momentum, kinetic energy, rapidity, and emission angle distributions as well as the invariant cross-sections of Δ0(1232)-resonances werere constructed in the laboratory frame. The freeze-out temperature of theΔ0(1232)-resonances produced in p + 12C collisions was estimated and compared to the freeze-out temperatures obtained using different methods for Δ(1232)-resonances produced in other experiments with different sets of colliding nuclei at various incident energies.