Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Searching for a dark matter coupling to the Standard Model with a
  Stueckelberg extension   We investigate a double extension to the Standard Model (SM). A first
extension introduces, via minimal coupling, a massive $Z'$ boson. This enlarged
SM is coupled to a dark matter sector through the Stueckelberg mechanism by a
$A'$ boson. However, the $A'$ boson does not interact directly with the SM
fermions. In our study, we found that the $A'$ is a massless photon-like
particle in dark sector. Constraints on the mass for $Z'$ and corrections to
$Z$ mass are obtained.

16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat