Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Palatini $f(R)$ gravity and variants of k-/constant roll/warm inflation
  within variation of strong coupling scenario   We show that upon applying Palatini $f(R)$, characterized by an $\a
R^2$-term, within a scenario motivated by a temporal variation of strong
coupling constant, then one gets a quadratic kinetic energy. We do not drop
this term, but rather study two extreme cases: $\a <<1$ and $\a >>1$. In both
cases one can generate a kinematically-induced inflationary paradigm. In order
to fit the Planck 2018 data, the $\a >>1$ case, called k-inflation, requires a
fine tuning adjustment with non-vanishing non-minimal coupling to gravity
parameter $\xi$, whereas the $\a <<1$ case, studied in the constant-roll
regime, can fit the data for vanishing $\xi$. The varying strong coupling
inflation scenario remains viable when implemented through a warm inflation
scenario with or without $f(R)$ gravity.

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The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
1
The categories of this paper are: cs