Three-body recombination at vanishing scattering lengths in an ultracold Bose gas

We report on measurements of three-body recombination rates in an ultracold gas of 7Li atoms in the extremely non-universal regime where the two-body scattering length vanishes. We show that the rate is well-defined and can be described by two-body parameters only: the scattering length a and the effective range Re. We find the rate to be energy-independent, and by connecting our results with previously reported measurements in the universal limit we cover three-body recombination in the whole range from weak to strong two-body interactions. We identify a non-trivial magnetic field value in the non-universal regime where the rate should be strongly reduced.