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Shell-Model Calculations for_{\Lambda}^{16}O and_{\Lambda}^{17}O Using Microscopic Effective Interactions with \Sigma Degrees of Freedom

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arxiv nucl-th/0206012 v1 pith:6HHOFS3J submitted 2002-06-05 nucl-th

classification nucl-th
keywords lambdadegreesfreedominteractionssigmacalculationseffectivehyperon-nucleon
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Shell-model calculations in a large model space are performed for _{\Lambda}^{16}O and_{\Lambda}^{17}O. Effective interactions with degrees of freedom of \Sigma in addition to \Lambda and nucleons are derived from hyperon-nucleon and nucleon-nucleon interactions within the framework of the unitary-model-operator approach. Effects of the \Sigma degrees of freedom and the parity-mixing intershell coupling on the \Lambda hypernuclear structure are investigated, employing the Nijmegen NSC97a-f and NSC89 hyperon-nucleon potentials.

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