Medium polarization and pairing in asymmetric nuclear matter


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Abstract

The many-body theory of asymmetric nuclear matter is developed beyond the Brueckner–Hartree–Fock approximation to incorporate the medium polarization effects. The extension is performed within the Babu–Brown induced interaction theory. After deriving the particle–hole interaction in the form of Landau–Migdal parameters, the effects of the induced component on the symmetry energy are investigated along with the screening of 1S0 proton–proton and 3PF2 neutron–neutron pairing, which are relevant for the neutron-star cooling. The crossover from repulsive (screening) to attractive (anti-screening) interaction going from pure neutron matter to symmetric nuclear matter is discussed.

About the authors

J. M. Dong

Institute of Modern Physics

Email: lombardo@lns.infn.it
China, Lanzhou

U. Lombardo

Dipartimento di Fisica e Astronomia, and INFN-LNS

Author for correspondence.
Email: lombardo@lns.infn.it
Italy, Catania

H. F. Zhang

School of Nuclear Science and Technology

Email: lombardo@lns.infn.it
China, Lanzhou

W. Zuo

Institute of Modern Physics

Email: lombardo@lns.infn.it
China, Lanzhou

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