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Pairing in high-density neutron matter including short- and long-range correlations

Rios Huguet, A, Ding, D, Dussan, H, Dickhoff, WH, Witte, SJ, Carbone, A and Polls, A (2016) Pairing in high-density neutron matter including short- and long-range correlations Physical Review C: Nuclear Physics, 94, 025802.

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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.

Item Type: Article
Subjects : Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Rios Huguet, AUNSPECIFIEDUNSPECIFIED
Ding, DUNSPECIFIEDUNSPECIFIED
Dussan, HUNSPECIFIEDUNSPECIFIED
Dickhoff, WHUNSPECIFIEDUNSPECIFIED
Witte, SJUNSPECIFIEDUNSPECIFIED
Carbone, AUNSPECIFIEDUNSPECIFIED
Polls, AUNSPECIFIEDUNSPECIFIED
Date : 11 August 2016
Funders : STFC
Identification Number : 10.1103/PhysRevC.94.025802
Copyright Disclaimer : Copyright 2016 American Physical Society
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 06 Sep 2016 14:27
Last Modified : 06 Sep 2016 14:27
URI: http://epubs.surrey.ac.uk/id/eprint/811693

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