HYP2018: 13th International Conference on Hypernuclear and Strange Particle Physics

Beyond relativistic mean-field approaches to deformed hypernuclei

Not scheduled

15m

2nd Floor

Abstract Submission

Speaker

Dr Jiangming Yao (University of North Carolina at Chapel Hill)

Description

Beyond relativistic mean-field approaches to deformed hypernuclei J.M. Yao1,2, H. Mei1,3, K. Hagino3,4, and T. Motoba5,6 1 Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27516-3255, USA 2 Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48844, USA 3 Department of Physics, Tohoku University, Sendai 980-8578, Japan 4 Research Center for Electron Photon Science, Tohoku University, 1-2-1 Mikamine, Sendai 982-0826, Japan 5 Laboratory of Physics, Osaka Electro-Communication University, Neyagawa 572-8530, Japan 6 Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan Hypernuclei provide a natural and accessible laboratory to study hyperon-nucleon interaction and the impurity effect of hyperon in nuclear medium, which are relevant for understanding the structure of neutron stars. Building a connection between the accumulated data of γ-ray and reaction spectroscopic experiments on hypernuclei and the hyperon-nucleon interaction is our main task, even though this connection relies on nuclear many-body methods. Self-consistent mean-field approaches have been extensively adopted for hypernuclear structure since decades ago. Several interesting phenomena about hyperon impurity effect have been disclosed, such as the shrinkage of nuclear size, the modification of nuclear equilibrium shapes, the reduction of fission-barrier height in heavy nuclei, and the extension of nucleon driplines. Nevertheless, the constraints on the mean-field approaches from the hypernuclear data are mostly limited to the hyperon separation energies and the hyperon spin-orbit splitting. To overcome the difficulty of interpreting the rich hypernuclear spectroscopic data based on the mean-field approaches, one has to go beyond the mean-field approximations. It is particularly important for deformed or transitional hypernuclei where we expect to disclose novel interplay between hyperon and nuclear collective motions. In this talk, I will overview the progress on the relativistic mean-field approaches for Lambda hypernuclei with axially deformed, triaxially deformed or octuple deformed shapes. In particular, I will introduce the recent developments on the beyond mean-field studies of hypernuclear low-lying states. Finally, I will propose an ab-initio generator coordinate method calculation of deformed/transitional hypernuclei in medium-mass region based on chiral nuclear forces. References K. Hagino, J. M. Yao, “Structure of hypernuclei in relativistic approaches”, chapter 7 of International Review of Nuclear Physics, “Relativistic Density Functional for Nuclear Structure”, edited by J. Meng, Vol. 10 (World Scientific, Singapore, 2016). W. X. Xue, J. M. Yao, K. Hagino, Z. P. Li, H. Mei, and Y. Tanimura, Phys. Rev. C 91, 024327 (2015) H. Mei, K. Hagino, J. M. Yao, Phys. Rev. C 93, 011301(R) (2016). H. Mei, K. Hagino, J. M. Yao, and T. Motoba, Phys. Rev. C 90, 064302 (2014). H. Mei, K. Hagino, J. M. Yao, and T. Motoba, Phys. Rev. C 91, 064305 (2015). H. Mei, K. Hagino, J. M. Yao, and T. Motoba, Phys. Rev. C 93, 044307(2016). H. Mei, K. Hagino, J. M. Yao, and T. Motoba, Phys. Rev. C 96, 014308 (2017).