Neutron matter from chiral two- and three-nucleon calculations up to N$^3$LO
Abstract
Neutron matter is an ideal laboratory for nuclear interactions derived from chiral effective field theory since all contributions are predicted up to next-to-next-to-next-to-leading order (NLO) in the chiral expansion. By making use of recent advances in the partial-wave decomposition of three- nucleon (3N) forces, we include for the first time NLO 3N interactions in many-body perturbation theory (MBPT) up to third order and in self-consistent Green's function theory (SCGF). Using these two complementary many-body frameworks we provide improved predictions for the equation of state of neutron matter at zero temperature and also analyze systematically the many-body convergence for different chiral EFT interactions. Furthermore, we present an extension of the normal-ordering framework to finite temperatures. These developments open the way to improved calculations of neutron-rich matter including estimates of theoretical uncertainties for astrophysical applications.
Keywords
Cite
@article{arxiv.1608.05615,
title = {Neutron matter from chiral two- and three-nucleon calculations up to N$^3$LO},
author = {C. Drischler and A. Carbone and K. Hebeler and A. Schwenk},
journal= {arXiv preprint arXiv:1608.05615},
year = {2016}
}
Comments
minor changes, published version