Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low reflection at zero or low-energies in the well-barrier scattering
  potentials   Probability of reflection $R(E)$ off a finite attractive scattering potential
at zero or low energies is ordinarily supposed to be 1. However, a fully
attractive potential presents a paradoxical result that $R(0)=0$ or $R(0)<1$,
when an effective parameter $q$ of the potential admits special discrete
values. Here, we report another class of finite potentials which are
well-barrier (attractive-repulsive) type and which can be made to possess much
less reflection at zero and low energies for a band of low values of $q$. These
well-barrier potentials have only two real turning points for $E \in(V_{min},
V_{max})$, excepting $E=0$. We present two exactly solvable and two numerically
solved models to confirm this phenomenon.

15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th