Measurement of the cross section of the reaction pp → pp π0 in the region of dibaryon resonances

The energy dependence of the cross section of the neutral pion production is measured in the range 600÷900 MeV. No unambiguous evidences for the existence of broad isovector dibaryon resonances were obtained. The isoscalar cross section of the pion production does not reveal any structure, predicted by the theory with resonances.