Tensor Fermi liquid parameters in nuclear matter from chiral effective field theory
| Autor: | Norbert Kaiser, T. R. Whitehead, Jeremy W. Holt |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Isovector Nuclear Theory 010308 nuclear & particles physics Isoscalar FOS: Physical sciences Nuclear matter 01 natural sciences Nuclear Theory (nucl-th) symbols.namesake Pauli exclusion principle Quantum mechanics 0103 physical sciences symbols Quasiparticle Effective field theory Fermi liquid theory 010306 general physics Nucleon |
| DOI: | 10.48550/arxiv.1712.05013 |
| Popis: | We compute from chiral two- and three-body forces the complete quasiparticle interaction in symmetric nuclear matter up to twice nuclear matter saturation density. Second-order perturbative contributions that account for Pauli-blocking and medium polarization are included, allowing for an exploration of the full set of central and noncentral operator structures permitted by symmetries and the long-wavelength limit. At the Hartree-Fock level, the next-to-next-to-leading order three-nucleon force contributes to all noncentral interactions, and their strengths grow approximately linearly with the nucleon density up that of saturated nuclear matter. Three-body forces are shown to enhance the already strong proton-neutron effective tensor interaction, while the corresponding like-particle tensor force remains small. We also find a large isovector cross-vector interaction but small center-of-mass tensor interactions in the isoscalar and isovector channels. The convergence of the expansion of the noncentral quasiparticle interaction in Landau parameters and Legendre polynomials is studied in detail. Comment: 15 pages, 14 figures |
| Databáze: | OpenAIRE |
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