Abstract :
Nucleon-antinucleon scattering experiments carried out at LEAR are briefly reviewed. Differential cross-section data of high accuracy are now available at many energies, and for the first time also analysing power data and some data on spin correlation parameters. Excellent fits to the View the MathML source data base have been performed by the Nijmegen group, both with a phase-shift analysis and with a coupled-channel potential model.
The high precision cross section data from experiment PS206 have allowed a determination of the charged pion-nucleon coupling constant by a simple extrapolation to the pion pole.
A phenomenological analysis of the line-reversed reaction np → pn and View the MathML source data is ongoing, to single out the basic dynamical features of the long-range part of the interaction and possibly experimental manifestations of the G-parity rule.
