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Excitation of intermediate dibaryon resonances in hadronic processes accompanied by high momentum transfers is considered. It is shown that some basic features of NN inelastic scattering with single- or double-pion production can be effectively described by taking into account the short-range s-channel dibaryon excitation along with peripheral t-channel meson-exchange processes. In particular, isovector...
We investigate the basic 2π-fusion reaction pn → d + (ππ)0 in the energy region Tp = 1–1.4GeV within the framework of a model based on a D03-dibaryon production and its subsequent decay via two interfering routes: through an intermediate σ meson and through an isovector dibaryon D12. We demonstrate that the constructive interference of the above two mechanisms gives a strong near-threshold enhancement...