Narrow diproton resonances in np-interactions at 0.6-5 GeV

Results of the analysis of the effective mass pp-spectra Mpp from the reactions np→ppπ-, ppπ-π0, ppπ+π-π- and ppπ+π-π-π0 with incident 0.6 to 5 GeV neutrons are presented. For Mpp=1877-2300 MeV/c2 17 narrow resonances (Γtrueres.≅1-10 MeV/c2) with statistical deviations of 3-6 standard errors from the background curve obtained by 'weight mixing' are observed. The most probable values of the spins of the resonances with masses of 1937, 1965 and 1980 MeV/c2 are ≥3-, ≥3- and ≥4±, respectively. The phenomenological rotation-oscillation model with a fundamental ππ-interaction provides a satisfactory agreement with experiment. The prospects of studying narrow hadron resonances of different types are considered. 13 refs.; 6 figs.; 3 tabs