Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Field Theory Model for Dark Matter and Dark Energy in Interaction   We propose a field theory model for dark energy and dark matter in
interaction. Comparing the classical solutions of the field equations with the
observations of the CMB shift parameter, BAO, lookback time and Gold supernovae
sample, we observe a possible interaction between dark sectors with energy
decay from dark energy into dark matter. The observed interaction provides an
alleviation to the coincidence problem.

37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph