Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Slow-roll inflation in f(R,T) gravity and a modified Starobinsky-like
  inflationary model   In this work, we studied the slow-roll approximation of cosmic inflation
within the context of $f(R,T)$ gravity, where $R$ is the scalar curvature, and
$T$ is the trace of the energy-momentum tensor. By choosing a minimal coupling
between matter and gravity, we obtained the modified slow-roll parameters, the
scalar spectral index ($n_s$), the tensor spectral index ($n_{\textrm{T}}$),
and the tensor-to-scalar ratio ($r$). We computed these quantities for a
general power-law potential, Natural & Quartic Hilltop inflation, and the
Starobinsky model, plotting the trajectories on the $(n_s,r)$ plane. We found
that one of the parameters of Natural/Hilltop models is non-trivially modified.
Besides, if the coupling is in the interval $-0.5 < \alpha < 5.54$, we
concluded that the Starobinsky-like model predictions are in good agreement
with the last Planck measurement, but with the advantage of allowing a wide
range of admissible values for $r$ and $n_{\textrm{T}}$.

25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an