Year: 2013
Type: preprint
Abstract: Correlated basis function perturbation theory and the formalism of cluster expansions have been recently employed to obtain an effective interaction from a state-of-the-art nuclear Hamiltonian. We report the results of a study of the superfluid gap in pure neutron matter, associated with formation of Cooper pairs in the $^1S_0$ sector. The calculations have been carried out using an improved version of the CBF effective interaction, in which three-nucleon forces are taken into account using a realistic microscopic model. Our results show that the superfluid transition occurs at densities corresponding to the neutron star inner crust, and that inclusion of three-nucleon interactions leads to a sizable reduction of the energy gap at the Fermi surface.
Source: arXiv (Cornell University)
Authors: Benhar, Omar, De Rosi, Giulia, Salvi, Giovanni
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2563527151