Strength of pairing interaction for hyperons in multistrangeness hypernuclei

New effective interactions for hypernuclei in density dependent relativistic mean field model

“…Both NL and DD couplings have been implemented in the MDC-RMF model for normal nuclei. The MDC-RMF model with NL self-couplings of meson fields has been also extended to Λ hypernuclei [37,75,77]. In the present work, we have included the DD couplings in the MDC-RMF model for Λ hypernuclei and, under the V 4 symmetry, solved Eqs.…”

“…From the theory side, the SU(3) flavor symmetry, which reveals the relation between baryon and meson octet states, is generally used for determining the YN interaction. With the constraint of SU(3) flavor symmetry or experimental observables, many approaches, such as Lattice QCD [19][20][21][22], the chiral effective field theory [23][24][25], the Nijmegen soft-core model [2,26,27], the Jülich hyperon-nucleon model [28][29][30], the Skyrme Hartree-Fock model [31][32][33] and the relativistic mean-field (RMF) model [34][35][36][37], have been used to study the structure of hypernuclei based on various (effective) YN and YY interactions.…”

Static octupole deformations in $^{96}$Zr from angular momentum and parity projections

“…For studying the various nuclear shapes in a unified framework, the multidimensionally-constrained covari-ant density functional theories (MDC-CDFTs) have been developed, in which all β λµ deformations with even µ can be considered simultaneously [56][57][58][59][60][61][62][63][64][65][66]. The MDC-CDFTs have been used to study the PES's and fission barriers in actinides [57][58][59]67] and superheavy nuclei [65], the third minima on PES's of light actinides [63], the effects of higher order deformations in superheavy nuclei [68], the non-axial octupole Y 32 correlations in N = 150 isotones [57] and Zr isotopes [69], the axial octupole Y 30 correlations in multiple chiral doublet bands (MχD) [70], and the fission dynamics in actinides [62,64,[71][72][73].…”

“…The MDC-CDFTs have been used to study the PES's and fission barriers in actinides [57][58][59]67] and superheavy nuclei [65], the third minima on PES's of light actinides [63], the effects of higher order deformations in superheavy nuclei [68], the non-axial octupole Y 32 correlations in N = 150 isotones [57] and Zr isotopes [69], the axial octupole Y 30 correlations in multiple chiral doublet bands (MχD) [70], and the fission dynamics in actinides [62,64,[71][72][73]. Besides, by including the strangeness degrees of freedom, the MDC-CDFTs was employed to study the shape evolution [56,60] and hyperon pairing correlation [66], and build new nucleonhyperon effective interactions [74]. Recently we developed a projected MDCRHB (p-MDCRHB) model by incorporating the parity and angular momentum projections into the MDCRHB model (a kind of MDC-CDFTs implementing Bogoliubov transformation for pairing correlation) to study the low-lying states related to exotic nuclear shapes, e.g., the triangular shape associated with the three-α configuration in 12 C [75].…”

Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around $^{270}$Hs

“…To study the ground state properties, potential energy surfaces (PESs), and fission barriers of heavy nuclei and SHN, the multidimensionally-constrained (MDC) CDFTs have been developed [41][42][43][44]. MDC-CDFTs have been applied to study hypernuclei [45][46][47][48], the fission barriers and the PESs of actinide nuclei [42,43,49], the ground state properties and PESs of the 270 Hs [50], the nonaxial octupole Y 32 correlations in N = 150 isotones [51] and Zr isotopes [52], octupole correlations in MχD of 78 Br [53] and Ba isotopes [54], etc. In MDC-CDFTs, the reflection symmetry and the axial symmetry are both broken and the shape degrees of freedom β λµ with µ being even numbers are self-consistently included, such as β 20 , β 22 , β 30 , β 32 , β 40 , β 42 , and β 44 .…”