Spin-polarized neutron matter at different orders of chiral effective field theory
Abstract
Spin-polarized neutron matter is studied using chiral two- and three-body forces. We focus, in particular, on predictions of the energy per particle in ferromagnetic neutron matter at different orders of chiral effective field theory and for different choices of the resolution scale. We discuss the convergence pattern of the predictions and their cutoff dependence. We explore to which extent fully polarized neutron matter behaves (nearly) like a free Fermi gas. We also consider the more general case of partial polarization in neutron matter as well as the presence of a small proton fraction. In other words, in our calculations, we vary both spin and isospin asymmetries. Confirming the findings of other microscopic calculations performed with different approaches, we report no evidence for a transition to a polarized phase of neutron matter5
Keywords
Cite
@article{arxiv.1505.04836,
title = {Spin-polarized neutron matter at different orders of chiral effective field theory},
author = {F. Sammarruca and R. Machleidt and N. Kaiser},
journal= {arXiv preprint arXiv:1505.04836},
year = {2015}
}
Comments
21 pages, 5 figures. arXiv admin note: text overlap with arXiv:1104.0437