Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on strongly coupled chameleon fields from the experimental
  test of the weak equivalence principle for the neutron   The chameleon scalar field is considered as a possible cause of accelerated
expansion of the Universe. The chameleon field induces an interaction potential
between a particle and a massive body. Previous experiments with falling cold
neutrons intended to measure the neutron coherent scattering lengths and
verification of the weak equivalence principle for the neutron are used to
constrain the parameters characterizing the strength of the scalar chameleon
fields.

6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
2
The categories of this paper are: math