TY - JOUR
T1 - The quasiparticle interaction, a shield of nuclear matter against pion condensation
AU - Dickhoff, W. H.
AU - Faessler, Amand
AU - Meyer-Ter-Vehn, J.
AU - Müther, H.
PY - 1981/10/5
Y1 - 1981/10/5
N2 - A microscopic calculation is presented for the quasiparticle interaction in nuclear matter. As a starting point a Brueckener G-matrix is used, which is derived from realistic potentials (Reid soft core, HM2Δ). Keeping the full complexity of this interaction, the excitation modes for the different spin-isospin channels are evaluated. The effects of isobar excitation [Δ(3, 3)] are also taken into account. The exchange of the corresponding phonons is added to the bare G-matrix and the influence of this so-called crossed channel renormalization on the interaction of quasiparticles at the Fermi surface is discussed. This renormalization of the particle-hole interaction increases drastically the critical density for pion condensation in nuclear matter.
AB - A microscopic calculation is presented for the quasiparticle interaction in nuclear matter. As a starting point a Brueckener G-matrix is used, which is derived from realistic potentials (Reid soft core, HM2Δ). Keeping the full complexity of this interaction, the excitation modes for the different spin-isospin channels are evaluated. The effects of isobar excitation [Δ(3, 3)] are also taken into account. The exchange of the corresponding phonons is added to the bare G-matrix and the influence of this so-called crossed channel renormalization on the interaction of quasiparticles at the Fermi surface is discussed. This renormalization of the particle-hole interaction increases drastically the critical density for pion condensation in nuclear matter.
UR - https://www.scopus.com/pages/publications/0000484111
U2 - 10.1016/0375-9474(81)90767-3
DO - 10.1016/0375-9474(81)90767-3
M3 - Article
AN - SCOPUS:0000484111
SN - 0375-9474
VL - 368
SP - 445
EP - 476
JO - Nuclear Physics, Section A
JF - Nuclear Physics, Section A
IS - 3
ER -