IN-MEDIUM STIFFENING OF THE NUCLEON NUCLEON SPIN ISOSPIN INTERACTION

The tensor coupling of the ρ{variant} meson to the nucleon, in analogy to the isovector transverse form factor for electron scattering from nuclei, is enhanced because the nucleon mass mn, which occurs in the denominator of each of these, should be replaced in medium by the effective nucleon mass mn*. This leads to an increase in the ρ{variant}-exchange interaction in medium. This, in turn substantially stiffens the spin-isospin response in proton scattering from nuclei, and generally cuts down low energy shell model matrix elements of the tensor interaction. © 1990.