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Alkhazov, G. D.; Prokofiev, A. N.; Smirnov, I. B.; Strokovsky, E. A.
Physics of atomic nuclei, 09/2012, Letnik: 75, Številka: 9Journal Article
An analysis of the experimental data on one-pion and two-pion production in the p ( α, α ′) X reaction studied in a semi-exclusive experiment at an energy of E α = 4.2 GeV has been performed. The obtained results demonstrate that the inelastic α -particle scattering on the proton at the energy of the experiment proceeds either through excitation and decay of the Δ resonance in the projectile α particle, or through excitation in the target proton of the Roper resonance, which decays into a nucleon and a pion, or a nucleon and a σ meson—a system of two pions in the isospin I = 0, S -wave state.
