Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-10-06
International Journal of Modern Physics E21 (2012) 1250024
Physics
Nuclear Physics
Nuclear Theory
8 pages, 5 figures, based on the talk presented at 18th Nuclear Physics Workshop "Maria and Pierre Curie", 2011, Kazimierz, Po
Scientific paper
10.1142/S0218301312500243
The non-relativistic Skyrme energy density functional (EDF) based collective Hamiltonian, that takes into account dynamical correlations related to the restoration of broken symmetries and fluctuations of quadrupole collective variables, is applied to quantitatively study the impurity effect of $\Lambda$ hyperon on the collectivity of $^{44}$S. Several Skyrme forces for both the nucleon-nucleon ($NN$) and $\Lambda$-nucleon ($\Lambda N$) interactions are used. The influence of pairing strengths on the polarization effect of $\Lambda$ hyperon is also examined. It is found that although these Skyrme forces with different pairing strengths give somewhat different low-lying spectra for $^{44}$S, all of them give similar and generally small size of $\Lambda$ reduction effect (within 5%) on the collective properties.
Hagino Kouichi
Li Zhi Peng
Mei Hsien-Hao
Yao J. M.
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