Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A toy model for "elementariness"   Motivated by recent efforts to analyze corrections to Weinberg's relations
for the scattering length and effective range in the presence of a
near-threshold bound state, we play around with an instructive toy model for
non-relativistic scattering in a central potential. The model allows to
interpolate between bound-state configurations of high "compositeness", where
the wave function is spread over a wide region beyond the range of the
interaction, and compact configurations of high "elementariness", where the
wave function is confined to a small region around the center of the potential.

33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org