  The amplitude analysis has been performed on the pi0 pi0 final state obtained
in the pi- p charge exchange process. The pi0 pi0 scattering amplitudes have
been obtained for the S and D waves by the Chew-Low extrapolation and the
partial wave analysis. Breit Wigner parameters have been obtained for f0(1370)
and f2(1270). I=0 S wave pi0 pi0 scattering phase shift has been obtained below
K Kbar threshold. They agree well with the pi+ pi- standard phase shift data
below 650GeV and deviate by about 10 degrees from the standard data above
650MeV. They show a different behavior from those of Cason and others. The pi0
pi0 phase shift data have been analyzed by the IA method. Resonance parameters
have been obtained to be m_sigma =588 pm 12MeV and Gamma_sigma =281 pm 25MeV
with r_c=2.76 pm 0.15GeV^-1. They are excellently in agreement with those
obtained in the reanlysis on the pi+ pi- phase shift data.
