منابع مشابه
Shell-Model Description of Λ Hypernuclei
Empirical data on the spectra of light hypernuclei, especially the data from recent γ-ray experiments, is used to constrain the parameters which govern the p N s Λ and p N p Λ two-body matrix elements that enter into shell-model calculations.
متن کاملPionic decay of Λ Hypernuclei in a Continuum Shell Model
We evaluate pionic decay widths of Λ hypernuclei using a shell model for, both the nuclear bound and the continuum nucleon wave functions in the final state, and distorted waves for the outgoing pion. An excellent agreement with the recent KEK measurement of π −-decay widths of 12 Λ C and 28 Λ Si is found. Besides, results for 56 Λ Fe are consistent with the existing upper bound.
متن کاملAb initio description of p-shell hypernuclei.
We present the first ab initio calculations for p-shell single-Λ hypernuclei. For the solution of the many-baryon problem, we develop two variants of the no-core shell model with explicit Λ and Σ(+),Σ(0),Σ(-) hyperons including Λ-Σ conversion, optionally supplemented by a similarity renormalization group transformation to accelerate model-space convergence. In addition to state-of-the-art chira...
متن کاملUnitary-model-operator approach to Λ hypernuclei
A method is formulated for the description of lambda hypernuclei in the framework of the unitary-model-operator approach (UMOA). The method is applied to 17 Λ O. A lambda-nucleon effective interaction is derived, taking the coupling of the sigma-nucleon channel into account. The lambda single-particle energies are calculated for the 0s1/2, 0p3/2 and 0p1/2 states employing the Nijmegen soft-core...
متن کاملDouble Λ Hypernuclei and the Λ-λ Interaction. *
We approximate the double Λ hypernuclei by systems composed by two interacting Λ’s moving in the mean field potential created by the nuclear cores. The Λ-core potentials are adjusted to reproduce the binding energies of the corresponding single Λ hypernuclei [1]. A σ-ω meson exchange potential [2] is used for the Λ-Λ interaction. We apply both the Hartree-Fock (HF) and variational approximation...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2001
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(01)01013-2