Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scattering of scalar perturbations with cosmological constant in
  low-energy and high-energy regimes   We study the absorption and scattering of massless scalar waves propagating
in spherically symmetric spacetimes with dynamical cosmological constant both
in low-energy and high-energy zones. In the former low-energy regime, we solve
analytically the Regge-Wheeler wave equation and obtain an analytic absorption
probability expression which varies with $M\sqrt{\Lambda}$, where $M$ is the
central mass and $\Lambda$ is cosmological constant. The low-energy absorption
probability, which is in the range of $[0, 0.986701]$, increases monotonically
with increase in $\Lambda$. In the latter high-energy regime, the scalar
particles adopt their geometric optics limit value. The trajectory equation
with effective potential emerges and the analytic high-energy greybody factor,
which is relevant with the area of classically accessible regime, also
increases monotonically with increase in $\Lambda$, as long $\Lambda$ is less
than or of the order of $10^4$. In this high-energy case, the null cosmological
constant result reduces to the Schwarzschild value $27\pi r_g^2/4$.

26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex