Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resonant atom-dimer collisions in cesium: Testing universality at
  positive scattering lengths   We study the collisional properties of an ultracold mixture of cesium atoms
and dimers close to a Feshbach resonance near 550G 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 non-universal 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.

8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph