Superfluid Gap in Neutron Matter from a Microscopic Effective Interaction
Authors: Benhar O., De Rosi G.
Autors Affiliation: Univ Roma La Sapienza, Ist Nazl Fis Nucl, Rome, Italy; Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy; Univ Trento, INO CNR BEC Ctr, Trento, Italy; Univ Trento, Dipartimento Fis, Trento, Italy
Abstract: Correlated basis function (CBF) perturbation theory and the formalism of cluster expansions have been recently employed to obtain an effective interaction from a nuclear Hamiltonian strongly constrained by phenomenology. We report the results of a study of the superfluid gap in pure neutron matter, associated with the formation of Cooper pairs in the channel. 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 microscopic model. Our results show that a non-vanishing superfluid gap develops at densities in the range 2 x 10(-4) less than or similar to rho/rho(0) less than or similar to 0.1, where rho(0) = 2.8 x 10(14) g cm(-3) is the equilibrium density of isospin-symmetric nuclear matter, corresponding mainly to the neutron-star inner crust.
Journal/Review: JOURNAL OF LOW TEMPERATURE PHYSICS
Volume: 189 (5-6) Pages from: 250 to: 261
KeyWords: Neutron stars; Superfluidity; Nuclear matter; Correlated basis functions; Cluster expansionsDOI: 10.1007/s10909-017-1823-xCitations: 5data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2023-05-28References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here