Skyrme functional with tensor terms from ab initio calculations: Results for the spin-orbit splittings

• Published in: Acta Physica Polonica B Proceedings Supplement
• Main Authors: Shen S., Colo' G., Roca-Maza X.
• Other Authors: S. Shen, G. Colo', X. Roca-Maza
• Format: Book Part
• Language: English
• Published: Jagiellonian University 2019
• Subjects: Settore FIS/04 - Fisica Nucleare e Subnucleare; Hartree; sami
• Online Access: https://hdl.handle.net/2434/1049768; https://doi.org/10.5506/APhysPolBSupp.12.699

A new Skyrme functional including tensor terms is presented. The tensor terms have been determined by fitting the results of relativistic Brueckner-Hartree-Fock (RBHF) studies on neutron-proton drops. Unlike all previous studies, where the tensor terms were usually determined by fitting to experimental data of single-particle levels, the pseudodata calculated by RBHF does not contain beyond mean-field effect such as the particle-vibration coupling and, therefore, can provide information on the tensor term without ambiguities. The obtained new functional, named SAMi-T, can describe well ground-state properties such as binding energies, radii, spin-orbit splittings and, at the same time, the excited state properties such as those of the Giant Monopole Resonance (GMR), Giant Dipole Resonance (GDR), Gamow-Teller Resonance (GTR), and Spin-Dipole Resonance (SDR).