Tensor quasiparticle interaction and spin—isospin sound in nuclear matter

The effect of the tensor components of the quasiparticle interaction in nuclear matter on the spin—isospin sound type excitations is studied. Numerical results are obtained using a simplified model of the quasiparticle interaction in nuclear matter. The quasiparticle distribution matrix corresponding to the spin—isospin sound is found to be qualitatively different from that obtained for purely central quasiparticle interaction. The macroscopic effects, however, are restricted to a small change in the phase velocity of the spin—isospin sound.