A. Zenesini, B. Huang, M. Berninger, S. Besler, H. -C. Nägerl, F. Ferlaino, R. Grimm, Chris H. Greene, J. von Stecher
We combine theory and experiment to investigate five-body recombination in an ultracold gas of atomic cesium. A refined theoretical model, in combination with extensive laboratory tunability of the scattering length, enables the five-body resonant recombination rate to be calculated and measured. The position of the new observed recombination maximum agrees with a recent theoretical prediction and strongly supports the prediction of a family of universal cluster states tied to an Efimov trimer.
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http://arxiv.org/abs/1205.1921
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