MODEL FOR THE QUASI-FREE POLARIZATION-TRANSFER MEASUREMENTS IN THE (PP)OVER-RIGHT-ARROW, (N)OVER-RIGHT-ARROW) REACTION AT 495 MEV

The recent (p over arrow pointing right, n over arrow pointing right) polarization transfer experiments show the ratio of spin-longitudinal to spin-transverse response functions R(L)/R(T), measured at a three-m omentum transfer of 1.72 fm-1 in C-12 and Ca-40, to be essentially uni ty for small projectile-energy loss. This can be explained theoretical ly if the nucleon-nucleon tensor interaction is zero at this momentum transfer. We can partially achieve this by introducing a density-depen dent p-meson mass m(rho).