Polarization contributions to the spin-dependence of the effective interaction in neutron matter
Nuclear Theory
2009-11-10 v2
Abstract
We calculate the modification of the effective interaction of particles on the Fermi surface due to polarization contributions, with particular attention to spin-dependent forces. In addition to the standard spin-spin, tensor and spin-orbit forces, spin non-conserving effective interactions are induced by screening in the particle-hole channels. Furthermore, a novel long-wavelength tensor force is generated. We compute the polarization contributions to second order in the low-momentum interaction V_{low k} and find that the medium-induced spin-orbit interaction leads to a reduction of the 3P2 pairing gap for neutrons in the interior of neutron stars.
Keywords
Cite
@article{arxiv.nucl-th/0307089,
title = {Polarization contributions to the spin-dependence of the effective interaction in neutron matter},
author = {A. Schwenk and B. Friman},
journal= {arXiv preprint arXiv:nucl-th/0307089},
year = {2009}
}
Comments
4 pages, 3 figures, minor revisions, to appear in Phys. Rev. Lett