TESTS OF FORM OF THE ONE-PION EXCHANGE POTENTIAL

Abstract

The mathematical form of the one-pion exchange potential (OPEP) is tested by comparison with experimental material on nucleon-nucleon scattering. The tests are performed by modifying the form following from meson theory through changes in the proportions of spin-spin and tensor parts of the potential and also by adding a central potential part. These two tests are performed independently of each other, and in each case the pion-nucleon coupling constant is allowed to vary simultaneously with the modifying parameter. Proton-proton and proton-neutron data are treated independently of each other. The experimental material is in the region from about 9 to 340 Mev. Within the statistical error of the determination of best values of the parameters they are not significantly different from zero as long as the conditions for the applicability of the OPEP are satisfied through exclusion of too low values of orbital angular momentum Lh. A definite deviation appears in tests of the central potential when L = 4 is admitted in the OPEP group of singlet even potentials. The absence of a definite effect for the proportion of spin-spin and tensor parts in tests performed fits expectation for the two-pion exchange potential. (auth)