Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Efimov physics and the three-body parameter for shallow van der Waals
  potentials   Extremely weakly-bound three-boson systems are predicted to exhibit
intriguing universal properties such as discrete scale invariance. Motivated by
recent experimental studies of the ground and excited helium trimers, this work
analyzes the three-body parameter and the structural properties of three helium
atoms as the s-wave scattering length is tuned artificially. Connections with
theoretical and experimental studies of the Efimov scenario as it pertains to
cold atom systems are made.

29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn