Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rastall's Cosmology and its Observational Constraints   The Rastall's theory is a modification of General Relativity touching one of
the cornestone of gravity theory: the conservation laws. In Rastall's theory,
the energy-momentum tensor is not conserved anymore, depending now on the
gradient of the Ricci curvature. In this sense, this theory can be seen as a
classical implementation of quantum effects in a curved background space-time.
We exploit this structure in order to reproduce some results of an effective
theory of quantum loop cosmology. Later, we propose a model for the dark sector
of the universe. In this case, the corresponding $\Lambda$CDM model appears as
the only model consistent with observational data.

30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
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The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph