Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Complementary constraints on non-standard cosmological models from CMB
  and BBN   We study metric-affine gravity (MAG) inspired cosmological models. Those
models were statistically estimated using the SNIa data. We also use the cosmic
microwave background observations and the big-bang nucleosynthesis analysis to
constrain the density parameter $\Omega_{\psi,0}$ which is related to the
non-Riemannian structure of the underlying spacetime. We argue that while the
models are statistically admissible from the SNIa analysis, complementary
stricter limits obtained from the CMB and BBN indicate that the models with
density parameters with a $a^{-6}$ scaling behaviour are virtually ruled out.
If we assume the validity of the particular MAG based cosmological model
throughout all stages of the Universe, the parameter estimates from the CMB and
BBN put a stronger limit, in comparison to the SNIa data, on the presence of
non-Riemannian structures at low redshifts.

20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
18
The categories of this paper are: econ
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con