Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 42: Few-body physics
HK 42.3: Talk
Tuesday, March 17, 2009, 17:15–17:30, H-ZO 100
Three-boson bound states in finite volume with EFT — •Simon Kreuzer1,2 and H.-W. Hammer1,2 — 1Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn — 2Bethe Center for Theoretical Physics, Universität Bonn
The universal properties of a three-boson system with large scattering length are well understood within the framework of Effective Field Theory. They include a geometric spectrum of shallow three-body bound states called Efimov states and log-periodic dependence of scattering observables on the scattering length. We investigate the modification of this spectrum in a finite cubic box using a partial wave expansion. The dependence of the binding energies on the box size is calculated and the renormalization of the Effective Field Theory in finite volume is verified explicitly.