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Title: Tensor force effects and high-momentum components in the nuclear symmetry energy
Author: Carbone, Arianna
Polls Martí, Artur
Providência, C.
Rios Huguet, Arnau
Vidaña Haro, Isaac
Keywords: Simetria (Física)
Física nuclear
Moment angular (Física nuclear)
Symmetry (Physics)
Nuclear physics
Angular momentum (Nuclear physics)
Issue Date: 25-Feb-2014
Publisher: Società Italiana di Fisica & Springer Verlag
Abstract: We analyze microscopic many-body calculations of the nuclear symmetry energy and its density dependence. The calculations are performed in the framework of the Brueckner-Hartree-Fock and the self-consistent Green's functions methods. Within Brueckner-Hartree-Fock, the Hellmann-Feynman theorem gives access to the kinetic energy contribution as well as the contributions of the different components of the nucleon-nucleon interaction. The tensor component gives the largest contribution to the symmetry energy. The decomposition of the symmetry energy in a kinetic part and a potential energy part provides physical insight on the correlated nature of the system, indicating that neutron matter is less correlated than symmetric nuclear matter. Within the self-consistent Green's function approach, we compute the momentum distributions and we identify the effects of the high momentum components in the symmetry energy. The results are obtained for the realistic interaction Argonne V18 potential, supplemented by the Urbana IX three-body force in the Brueckner-Hartree-Fock calculations.
Note: Versió postprint del document publicat a:
It is part of: European Physical Journal A, 2014, vol. 50, num. 13
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ISSN: 1434-6001
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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