Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Matter Couplings which are Compatible with a Fundamental Theory of
  Physics   A criterion to seek for compatibility of any given matter coupling with a
fundamental theory of physics - assumed here to be the string theory - is
developed. We call this criterion as"`compatibility check", and apply it to
test different kinds of matter coupling which are familiar in cosmological
scenarios. The so called "chameleon effect" - useful to overcome the stringent
constraints on additional non gravitational interactions - is reviewed by
relaxing several assumptions which are commonly found in the bibliography in
order to explore the chameleon behavior of self-interacting scalar fields.
Although the results of this study are far from being conclusive, these (i)
suggest that matter couplings other than the exponential (dilaton) are very
unlikely to arise in a cosmological setup, and (ii) pose reasonable doubts on
the validity of the chameleon picture as we know it.

10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas