Disappearance of nuclear deformation in hypernuclei: A perspective from a beyond-mean-field study

H. Mei, K. Hagino, J. M. Yao, T. Motoba

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6 Citations (Scopus)

Abstract

The previous mean-field calculation [Phys. Rev. C 78, 054311 (2008)PRVCAN0556-281310.1103/PhysRevC.78.054311] has shown that the oblate deformation in Si28,30,32 disappears when a Λ particle is added to these nuclei. Here, we investigate this phenomenon by taking into account the effects beyond the mean-field approximation. To this end, we employ the microscopic particle-rotor model based on the covariant density functional theory. We show that the deformation of Si30 does not completely disappear, even though it is somewhat reduced, after a Λ particle is added if the beyond-mean-field effect is taken into account. We also discuss the impurity effect of a Λ particle on the electric-quadrupole transition and show that an addition of a Λ particle leads to a reduction in the B(E2) value, as a consequence of the reduction in the deformation parameter.

Original languageEnglish
Article number064318
JournalPhysical Review C
Volume97
Issue number6
DOIs
Publication statusPublished - 2018 Jun 25

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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