Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Searching for cosmological signatures of the Einstein equivalence
  principle breaking   Modifications of gravity generated by a multiplicative coupling of a scalar
field to the electromagnetic Lagrangian lead to a breaking of Einstein
equivalence principle (EEPB) as well as to variations of fundamental constants.
In these theoretical frameworks, deviations of standard values of the fine
structure constant, $\Delta \alpha/\alpha=\phi$, and of the cosmic distance
duality relation, $D_L(1+z)^{-2}/D_A=\eta=1$, where $D_L$ and $D_A$ are the
luminosity and angular diameter distances, respectively, are unequivocally
linked. In this paper, we search for cosmological signatures of the EEPB by
using angular diameter distance from galaxy clusters, obtained via their
Sunyaev-Zeldovich effect (SZE) and X-ray observations, and distance modulus of
type Ia supernovae (SNe Ia). The crucial point here is that we take into
account the dependence of the SZE/X-ray technique with $\phi$ and $\eta$. Our
new results show no indication of the EEPB.

19
The categories of this paper are: eess
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat