[Formula Presented]-wave pairing of Λ hyperons in dense matter

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Abstract

In this work we calculate the [Formula Presented] gap energies of Λ hyperons in neutron star matter. The calculation is based on a solution of the BCS gap equation for an effective [Formula Presented]-matrix parametrization of the Λ-Λ interaction with a nuclear matter background, presented recently by Lanskoy and Yamamoto. We find that a gap energy of a few tenths of a MeV is expected for Λ Fermi momenta up to about [Formula Presented] Implications for neutron star matter are examined, and suggest the existence of a Λ [Formula Presented] superfluid between the threshold baryon density for Λ formation and the baryon density where the Λ fraction reaches 15–20 %.

Original languageAmerican English
Pages (from-to)409-416
Number of pages8
JournalPhysical Review C - Nuclear Physics
Volume57
Issue number1
DOIs
StatePublished - 1998

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