Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Axionic extension of the Proca action   In the context of Cartan theory, we will show that the Proca action can be
obtained from the Gauss-Bonnet action for a special choice of the torsion
tensor. This in fact equivalent to the special case of the 4th vector Galileon
Lagrangian. The theory will then be promoted to contain an axion field. It will
be proved that the model admits de Sitter expanding phase with healthy tensor
and vector fluctuations. The scalar sector has 4 degrees of freedom, but only
one of them remains dynamical in the limit $k\rightarrow\infty$. We will
analyze the scalar fluctuations in the small scales limit and obtain the
parameter space of the theory in which all the perturbations remain healthy.

22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph