Speaker
Dr
Kouichi Hagino
(Department of Physics, Tohoku University)
Description
Many high-resolution γ-ray spectroscopy experiments have been carried out for s-shell and p-shell Λ-hypernuclei in order to understand the nature of Λ-nucleon interaction in nuclear medium and the impurity effect of a Λ on nuclear structure. The J-PARC facility will provide an opportunity to perform hypernuclear γ-ray spectroscopy study with high precision by improving the quality of the secondary mesonic beam. In particular, the J-PARC facility will offer useful tools to study the low-lying states of hypernuclei in medium and heavy hypernuclei.
In this contribution, we will present the results of our recent calculations for Λ hypernuclei based on the self-consistent mean-field approaches. We will first discuss the potential energy surfaces for Λ-hypernuclei in the sd-shell region by using both the relativistic mean-field (RMF) and the non-relativistic Skyrme-Hartree-Fock (SHF) methods. We will show that the RMF approach predicts a disappearance of deformation for 13ΛC and 29ΛSi nuclei [1], although
the impurity effect of Λ particle is somewhat weaker with the SHF approach [2]. The effect of triaxial deformation can be taken into account much more easily with the SHF method [3]. We will discuss the rotational excitations of 25ΛMg nucleus using the three-dimensional energy surface obtained with the SHF method [4].
1. Myaing Thi Win and K. Hagino, Phys. Rev. C78 (2008) 054311.
2. H.-J. Schulze, Myaing Thi Win, K. Hagino, and H. Sagawa, Prog. Theo. Phys. 123
(2010) 569.
3. Myaing Thi Win, K. Hagino, and T. Koike, Phys. Rev. C83 (2011) 014301.
4. J.M. Yao, Z.P. Li, K. Hagino, M. Thi Win, Y. Zhang, and J. Meng, arXiv:0909.1741
[nucl-th].
Primary author
Dr
Kouichi Hagino
(Department of Physics, Tohoku University)
Co-authors
J.M. Yao
(School of Physical Science and Technology, Southwest University)
Myang Thi Win
(Department of Physics, Tohoku University)
Z.P. Li
(ce and Technology, Southwest University)
