Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observational Constraints on Axion(s) with a Cosmological Constant   The present work deals with a dark energy model that has an oscillating
scalar field potential along with a cosmological constant (CC). The oscillating
part of the potential represents the contribution of a light axion field in the
dark energy that has its origin in the String-Axiverse scenario. The model has
been confronted with the latest cosmological observations. The results show
that a sub-Planckian value of the axion field decay constant is consistent at
1$\sigma$ confidence level. The oscillating feature in the scalar field
evolution and in the equation of state for the dark energy can be observed at
2$\sigma$ confidence interval. It is also observed that cluster number counts
in this axion model are suppressed compared to the $\Lambda$CDM and this
suppression is enhanced for the sub-Planckian values for the axion decay
constant.

9
The categories of this paper are: nlin
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th