Tensor-force effects on nuclear matter in relativistic ab initio theory

Abstract

Within the relativistic Brueckner-Hartree-Fock theory in the full Dirac space, the tensor-force effects on infinite nuclear matter are elucidated by subtracting the matrix elements of tensor forces from the realistic nucleon-nucleon interaction. The tensor-force effects for the binding energy per particle of symmetric nuclear matter (SNM) as well as the symmetry energy are attractive and are more pronounced around the empirical saturation density, while the tensor forces have little impact on the pure neutron matter. By tuning the tensor-force strength, an infinite (negative) scattering length in the spin-triplet channel is found. This locates the dilute SNM with only the ${}^3{S}_1$-${}^3{D}_1$ channel interaction at the unitary limit. Its ground-state energy is found proportional to the energy of a free Fermi gas with a scaling factor 0.38, revealing good universal properties. This work paves the way to study the tensor-force effects in neutron stars as well as finite nuclei from realistic nucleon-nucleon interactions, highlights the role of the tensor force on the deviation of the nuclear physics to the unitary limit, and provides valuable reference for studies of the four-component unitary Fermi gas.

5 pages, 2 figures, discussion on four-component unitary Fermi gas is updated, accepted by Science Bulletin

References in corpus (14)

• Revealing the Superfluid Lambda Transition in the Universal Thermodynamics of a Unitary Fermi Gas
• Evolution of shell structure in exotic nuclei
• Auxiliary Field quantum Monte Carlo for Strongly Paired Fermions
• Towards an ab initio covariant density functional for nuclear structure
• Tensor interaction in mean-field and density functional theory approaches to nuclear structure
• Nuclear symmetry energy and the role of the tensor force
• Fully self-consistent relativistic Brueckner-Hartree-Fock theory for finite nuclei
• Nuclear matter in relativistic Brueckner-Hartree-Fock theory with Bonn potential in the full Dirac space
• Effects of tensor forces in nuclear spin-orbit splittings from ab initio calculations
• Quantitative analysis of tensor effects in the relativistic Hartree-Fock theory
• Asymmetric Nuclear Matter and Neutron Star Properties in Relativistic ab initio Theory in the Full Dirac Space
• Saturation of nuclear matter in the relativistic Brueckner Hatree-Fock approach with a leading order covariant chiral nuclear force
• The charge-dependent Bonn potentials with pseudovector pion-nucleon coupling
• The nuclear symmetry energy from relativistic Brueckner-Hartree-Fock model

Cited by in corpus (3)

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• Impact of finite-range spin-orbit and tensor terms in Gogny EDF
• Proton radioactivity in deformed nuclei with microscopic optical potential: A novel angular-dependent emission mechanism in the nanosecond-lived ${}^{149}$Lu