Minimal Relativity and 3S1-3D1 Pairing in Symmetric Nuclear Matter
Oe. Elgaroey, L. Engvik, E. Osnes, M. Hjorth-Jensen
Abstract
We present solutions of the coupled, non-relativistic 3S1-3D1 gap equations for neutron-proton pairing in symmetric nuclear matter, and estimate relativistic effects by solving the same gap equations modified according to minimal relativity and using single-particle energies from a Dirac-Brueckner-Hartree-Fock calculation. As a main result we find that relativistic effects decrease the value of the gap at the saturation density kF=1.36 fm-1 considerably, in conformity with the lack of evidence for strong neutron-proton pairing in finite nuclei.
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