Medium polarization in asymmetric nuclear matter

Abstract

The influence of the core polarization on the effective nuclear interaction of asymmetric nuclear matter is calculated in the framework of the induced interaction theory. The strong isospin dependence of the density and spin density fluctuations is studied along with the interplay between the neutron and proton core polarizations. Moving from symmetric nuclear matter to pure neutron matter the crossover of the induced interaction from attractive to repulsive in the spin singlet state is determined as a function of the isospin imbalance.The density range in which it occurs is also determined. For the spin triplet state the induced interaction turns out to be always repulsive. The implications of the results for the neutron star superfluid phases are shortly discussed.

6 pages, 4 figures

References in corpus (3)

• Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter
• Strongly paired fermions: Cold atoms and neutron matter
• Screening Effects in Superfluid Nuclear and Neutron Matter within Brueckner Theory

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• Medium polarization effects in 3SD1 spin-triplet pairing
• Neutron-proton pairing in Nuclear Matter
• Isospin-density dependent pairing from infinite nuclear matter to finite nuclei
• Phase diagrams of neutron-proton superfluid in asymmetric nuclear matter
• Cold atoms beyond atomic physics
• Coexistence of isospin I = 0 and I = 1 pairings in asymmetric nuclear matter
• On the spin-isospin decomposition of nuclear symmetry energy