Pairing in high-density neutron matter including short- and long-range correlations
Abstract
Pairing gaps in neutron matter need to be computed in a wide range of densities to address open questions in neutron star phenomenology. Traditionally, the Bardeen-Cooper-Schrieffer approach has been used to compute gaps from bare nucleon-nucleon interactions. Here, we incorporate the influence of short- and long-range correlations in the pairing gaps. Short-range correlations are treated including the appropriate fragmentation of single-particle states, and substantially suppress the gaps. Long-range correlations dress the pairing interaction via density and spin modes, and provide a relatively small correction. We use different interactions, some with three-body forces, as a starting point to control for any systematic effects. Results are relevant for neutron-star cooling scenarios, in particular in view of the recent observational data on Cassiopeia A.
Cite
@article{arxiv.1601.01600,
title = {Pairing in high-density neutron matter including short- and long-range correlations},
author = {D. Ding and A. Rios and H. Dussan and W. H. Dickhoff and S. J. Witte and A. Carbone and A. Polls},
journal= {arXiv preprint arXiv:1601.01600},
year = {2016}
}
Comments
Final published version. 18 pages, 14 figures, 2 tables. Includes preliminary comments and figure on three-neutron force effects