  The production and properties of the resonances in the system of Pi+Pi- were
studied in the reaction np --> npPi+Pi- at the momentum of incident neutrons
Pn=(5.20 +/- 0.12)GeV/c. In this work in comparison with previous ones we made
more hard selection of events taking into account track measurement precise. In
the distribution of the Pi+Pi- combinations effective masses we have found 8
peculiarities. All the observable peculiarities have spins equal to zero. There
were no corresponding picks in the Pi-PI- and Pi-Pi0 - systems in the reactions
np --> npPi+Pi- Pi- and np --> npPi-Pi0. So, we have observed a row of
resonances with a set of quantum numbers 0+(0++) -- SIGMA0 - mesons decaying on
the channel SIGMA0 --> Pi+Pi-. The obtained in other experiments masses
coincide with the sequence of masses observed in our experiment. Especially
good coincidence can be obtained in the K-matrix approach (see RPP).
