Pionic susceptibility for charged pions in asymmetric nuclei
M. Urban, J. Wambach
Abstract
At low energies the particle-hole (ph) part of the pionic susceptibility in isospin-symmetric nuclear matter is known to behave very differently from the susceptibility in finite nuclei due to the presence of an energy gap in the ph excitation spectrum. In this note we show that for charged pions in N > Z nuclei the changes due to the gap are very similar to those in the symmetric case, except at very low momenta, where a qualitatively different behavior is found.
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