Long Range Interaction in Low Energy K-N Scattering

概要

論文の詳細を見る
Differential K^+-p and K^+-d cross sections up to 642MeV/c are analysed under the assumption that the long range part of the interaction is given by the exchange of low lying particles and the long range' interaction dominates in the states with the total angular momentum j≧3/2, while the scattering amplitudes of the s_<1/2> and p_<1/2> states, to which the short range interaction is considered to give an important contribution, are treated as free parameters. Contributions from Λ, Σ, Y^*_0(1385 MeV), Y^*_0(1405 MeV), Y^*_0(1520 MeV), Y^*_1(1660 MeV), an iso-singlet scalar meson, (400~1000 MeV), p, w and φ are taken into account. Differently from a similar analysis given by Warnock and Frye, emphasis is here put on the higher angular momentum states. Two types of solutions which well reproduce the experimental data are found, one giving the Fermi-type I=0 phase shifts and the other the Yang-type I=0 ones. Contributions from the higher partial waves (l≧3) are estimated and found not negligible for the I=0 state at high energies. The coupling constants which give the Yang-type I=0 phase shifts are consistent with other analyses and the predictions of the SU(3) symmetry, while those giving the Fermi-type I=0 phase shifts are not. The possibility that the isotropic character of the K^+-p differential cross section is not due to the dominant s-wave scattering is also examined.
理論物理学刊行会の論文
1967-02-25