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Unitary-model-operator approach to $\Lambda$ hypernuclei

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arxiv nucl-th/9901055 v2 pith:KXEI2SJ2 submitted 1999-01-20 nucl-th

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keywords lambdaapproachhypernucleimethodmodel-unitary-model-operatoraccountapplied
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abstract

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 $_{\Lambda}^{17}$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 0s_{1/2}, 0p_{3/2} and 0p_{1/2} states employing the Nijmegen soft-core (NSC), J\"ulich model-\~A (J\~A) and model-\~B (J\~B) hyperon-nucleon potentials.

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