ANTIPROTON-PROTON PARTIAL-WAVE ANALYSIS BELOW 925 MEV C/

A partial-wave analysis of all ppBAR scattering data below 925 MeV/c a ntiproton laboratory momentum is presented. The method used is adapted from the Nijmegen phase-shift analyses of pp and np scattering data. We solve the Schrodinger equation for the coupled ppBAR and nnBAR chan nels where the long- and intermediate-range interactions are described by a theoretically well-founded potential. This gives the rapid varia tions of the scattering amplitudes with energy. This potential consist s of the Coulomb potential with the main relativistic correction, the magnetic-moment interaction, the one-pion-exchange potential, and the heavy-boson exchanges of the Nijmegen one-boson-exchange potential. Sl ow variations of the amplitudes due to short-range interactions, inclu ding the coupling to mesonic annihilation channels, are parametrized b y an energy-dependent, complex boundary condition, specified at a radi us of r = 1.3 fm. The Nijmegen 1993 ppBAR database, consisting of 3646 ppBAR scattering data, is presented and discussed. The best fit to th is database results in chi(min)2/N(data) = 1.043. This good fit to the data shows that the Nijmegen long- and intermediate-range potential i s essentially correct. The pseudovector coupling constant of the charg ed pion to nucleons is determined to be f(c)2 = 0.0732(11) at the pion pole, where the error is statistical.