We discuss our recent observation of an atom-dimer Efimov resonance in an ultracold mixture of Cs atoms and Cs2 Feshbach molecules [Nature Phys. 5, 227 (2009)]. We review our experimental procedure and present additional data involving a non-universal g-wave dimer state, to contrast our previous results on the universal s-wave dimer. We resolve a seeming discrepancy when quantitatively comparing our experimental findings with theoretical results from effective field theory.
Journal of Physics: Conference Series: proceedings of the XXVI International Conference on Photonic, Electronic and Atomic Collisions, Kalamazoo, Michigan, United States, 22-28 July 2009,
Vol. 194, part 1 (2009)