Resonant atom-dimer collisions in cesium: Testing universality at positive scattering lengths

@article{PhysRevA.90.022704,
  title = {Resonant atom-dimer collisions in cesium: Testing universality at positive scattering lengths},
  author = {Zenesini, A. and Huang, B. and Berninger, M. and Nägerl, H.-C. and Ferlaino, F. and Grimm, R.},
  journal = {Phys. Rev. A},
  volume = {90},
  issue = {2},
  pages = {022704},
  numpages = {8},
  year = {2014},
  month = {Aug},
  abstract = {We study the collisional properties of an ultracold mixture of cesium atoms and dimers close to a Feshbach resonance near 550 G in the regime of positive s-wave scattering lengths. We observe an atom-dimer loss resonance that is related to Efimov's scenario of trimer states. The resonance is found at a value of the scattering length that is different from a previous observation at low magnetic fields. This indicates nonuniversal behavior of the Efimov spectrum for positive scattering lengths. We compare our observations with predictions from effective field theory and with a recent model based on the van der Waals interaction. We present additional measurements on pure atomic samples in order to check for the presence of a resonant loss feature related to an avalanche effect, as suggested by observations in other atomic species. We could not confirm the presence of such a feature.},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevA.90.022704},
  url = {http://link.aps.org/doi/10.1103/PhysRevA.90.022704},
  arXiv = {http://arxiv.org/abs/1406.3443}
}