ON THE SENSITIVITY OF LOW-ENERGY 3-BODY PROPERTIES TO THE OFF-SHELL 2-BODY t-MATRIX

摘要

Direct modifications are made to the off-shell two-body t-matrices which are used as input to the Faddeev-Lovelace equations for the three-body bound state and for scattering below breakup. The t-matrices are modified when either momentum argument exceeds a particular value, in a manner consistent with off-shell unitarity. In this way, we are able to test the dependence of these three-body properties oh different regions of the off-shell momenta. We find a strong sensitivity for both momenta less than 2 f-1; weak, potential dependent sensitivity when either argument is between 2 and 5 f -1, and essentially no dependence if either argument exceeds 5 f-1.