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HK: Physik der Hadronen und Kerne

HK 43: Theory VII

HK 43.4: Vortrag

Donnerstag, 14. März 2002, 17:15–17:30, A

Short-ranged Central and Tensor Correlations in the Nuclear Many-Body System — •Thomas Neff, Hans Feldmeier, and Robert Roth — Gesellschaft für Schwerionenforschung, Darmstadt

Realistisc nucleon-nucleon interactions have a strong repulsive core and a strong tensor force. We introduce a unitary correlation operator that takes care of the short-ranged central and tensor correlations induced by the nuclear force. This unitary correlation operator allows us to perform ab initio calculations of nuclei up to A ≈ 50 in a mean-field or shell model many-body approach. The unitary correlation operator is the product of a central correlation operator that performs radial shifts in the two-body density and a tensor correlation operator that aligns the two-body density with the total spin of two nucleons. An effective interaction can be defined by correlating the bare nuclear interaction. The unitary correlation operator method provides a method to extract the common low-energy behavior of realistic nuclear interactions.