A new Λ- nucleus potential for the Λ- particle energies in hypernuclei

Double 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...

Unitary-correlation-operator method for Λ hypernuclei

The unitary-correlation-operator method (UCOM) is formulated for the description of lambda hypernuclei. 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 (NSC), Jülich model-Ã (J...

00 2 Λ + c - and Λ b - hypernuclei

Weak Transition in Double-Λ Hypernuclei

We calculate the ΛΛ → Y N transition rate of 6 ΛΛHe by the hybrid picture, the π and K exchanges plus the direct quark processes. It is found that the hyperon-induced decay is weaker than the nucleon-induced decay, but the former may reveal the short-range mechanism of the weak transition and also give a clear signal of the strong ∆I = 3/2 transition. The ΛΛ → YN transition in double-Λ hypernuc...

Λ∗-hypernuclei in phenomenological nuclear forces

The Λ∗-hypernuclei, which are bound states of Λ(1405) and nuclei, are discussed as a possible interpretation of the K̄-nuclei. The Bonn and Nijmegen potentials are extended and used as a phenomenological potential between Λ∗ and N . The Kexchange potential is also considered in the Λ∗ and N interaction. The two-body (Λ∗N) and three-body (Λ∗NN) systems are solved by a variational method. It is sh...