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HK: Fachverband Physik der Hadronen und Kerne

HK 32: Structure and Dynamics of Nuclei VI

HK 32.8: Vortrag

Mittwoch, 28. Februar 2018, 15:45–16:00, HZO 70

Recent progress in effective field theory for collective rotations and vibrations of triaxial nuclei — •Qibo Chen¹, Norbert Kaiser¹, Ulf-G Meissner^2,3, and Jie Meng⁴ — ¹Physik-Department, Technische Universität München, D-85747 Garching, Germany — ²Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany — ³Institute for Advanced Simulation, Institut für Kernphysik, Jülich Center for Hadron Physics and JARA-HPC, Forschungszentrum Jülich, D-52425 Jülich, Germany — ⁴State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China

In recent years, effective field theory has achieved many successes in hadronic and low-energy nuclear physics. In this talk, the recent progress in EFT for collective rotation and vibration of triaxial nuclei is reviewed. The Hamiltonian for the triaxial rotor is constructed up to NLO. Its applicability is examined by comparing with a five-dimensional rotor-vibrator Hamiltonian for the description of the energy spectra in Ru isotopes. It is found that by taking into account the NLO corrections, the ground state band in the whole spin region and the γ-band in the low spin region are well described. The deviations for high-spin states in the γ-bands point towards the importance of including vibrational degrees of freedom in the EFT formulation. Hence, the vibrational degree of freedom is further included in the construction of EFT formulation and a Hamiltonian for collective rotation-vibration is derived.