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Pairing in high-density neutron matter including short- and long-range correlations
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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.
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DING, D., et al. Pairing in high-density neutron matter including short- and long-range correlations. Physical Review C. 2016. Vol. 94, num. 2, pags. 025802-1-025802-17. ISSN 2469-9985. [consulted: 20 of August of 2026]. Available at: https://hdl.handle.net/2445/128311