Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 7: Theorie

HK 7.2: Talk

Monday, March 10, 2008, 14:30–14:45, 2F

Halo nuclei and universal properties of Efimov states — •David Canham and Hans-Werner Hammer — Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn

An s-wave separable potential model is used to explore the universal properties of Efimov states in a three-body system composed of two neutrons and a core. This effective potential is well suited to describe the short-range interactions of halo nuclei. One can construct a boundary curve parameterized by the ratio of the two-body subsystem energies, or corresponding scattering lengths, to the three-body bound state, within which Efimov excited states can exist. Universal properties of the Efimov effect, such as the universal scaling parameter, are found to match with similar studies done with effective field theory. The possibility of known halo nuclei displaying these universal properties is also explored.