Λ hypernuclear potentials beyond linear density dependence

Mass – dependence of the Λ hypernuclear decay widths

Two different approaches have been employed for the evaluation of the decay widths of Λ–hypernuclei (ranging from 5 Λ He to 208 Λ Pb) with the polarization propagator method. In ref. [1], the two–nucleon stimulated non–mesonic decay, ΛNN → NNN, has been parameterized phenomenologically by means of data on the pion–nucleus optical potential. The other approach [2] consisted in a fully microscopi...

In-medium Λ interactions and hypernuclear structure

We study the interactions of the octet baryons in a relativistic meson exchange approach connecting freespace and in-medium interactions with those in finite (hyper)nuclei. Our approach is based on the covariant meson exchange framework. To generate the effective microscopic interaction in finite nuclei an approach using Tmatrix theory with a three dimensionally reduced twonucleon propagator is...

Hypernuclear structure with the new Nijmegen potentials

We perform continuous-choice Brueckner-Hartree-Fock calculations of hypernuclear matter, using the recent Nijmegen potentials for hyperon-nucleon and hyperon-hyperon interactions. Single-particle observables of the various hyperons in bulk matter, as well as properties of singleand double-lambda hypernuclei, employing an extended Skyrme-Hartree-Fock scheme, are presented. We find that the poten...

Hypernuclear structure with the Nijmegen ESC08 potentials

Wavelet Linear Density Estimation for a GARCH Model under Various Dependence Structures

We consider n observations from the GARCH-type model: S = σ2Z, where σ2 and Z are independent random variables. We develop a new wavelet linear estimator of the unknown density of σ2 under four different dependence structures: the strong mixing case, the β- mixing case, the pairwise positive quadrant case and the ρ-mixing case. Its asymptotic mean integrated squared error properties are ...