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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.
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Contributor : Sophie Heurteau Connect in order to contact the contributor
Submitted on : Wednesday, May 11, 2016 - 11:45:20 AM
Last modification on : Tuesday, November 30, 2021 - 8:32:05 AM

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S. S. Zhang, L. G. Cao, U. Lombardo, P. Schuck. Medium polarization in asymmetric nuclear matter. Physical Review C, American Physical Society, 2016, 93 (4), pp.044329. ⟨10.1103/PhysRevC.93.044329⟩. ⟨in2p3-01314350⟩



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