Study of the process e+e-→π+π-π0 in the energy region √s from 0.98 to 1.38 GeV -: art. no. 032001

The cross section of the process e(+)e(-)-->pi(+)pi(-)pi(0) was measured in the Spherical Neutral Detector experiment at the VEPP-2M collider in the energy region roots=980-1380 MeV. The measured cross section, together with the e(+)e(-)-->pi(+)pi(-)pi(0) and omegapi(+)pi(-) cross sections obtained in other experiments, was analyzed in the framework of the generalized vector meson dominance model. It was found that the experimental data can be described by a sum of omega, phi mesons and two omega(') and omega(') resonances contributions, with masses m(omega)(')similar to1490, m(omega)(')similar to1790 MeV and widths Gamma(omega)(')similar to1210, Gamma(omega)(')similar to560 MeV. The analysis of the pi(+)pi(-) invariant mass spectra in the energy region roots from 1100 to 1380 MeV has shown that for their description one should take into account the e(+)e(-)-->omegapi(0)-->pi(+)pi(-)pi(0) mechanism also. The phase between the amplitudes corresponding to the e(+)e(-)-->omegapi and e(+)e(-)-->rhopi intermediate states was measured for the first time. The value of the phase is close to zero and depends on energy.