Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraining f(R,T) Gravity From The Dark Energy Density Parameter
  $\Omega_{\Lambda}$   $f(R,T)$ gravity is a widely used extended theory of gravity introduced in
\cite{9} which is a straightforward generalization of $f(R)$ gravity. The
action in this extended theory of gravity incorporates well motivated
functional forms of the Ricci scalar $R$ and trace of energy momentum tensor
$T$. The present manuscript aims at constraining the most widely used $f(R,T)$
gravity model of the form $f(R+2\lambda T)$ to understand its coherency and
applicability in cosmology. We communicate here a novel method to find an lower
bound on the model parameter $\lambda \gtrsim -1.9 \times 10^{-8}$ through the
equation relating the cosmological constant ($\Lambda$) and the critical
density of the universe ($\rho_{cr}$).

21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
17
The categories of this paper are: q-fin