Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classical and quantum scattering by a gravitational center   The small angle scattering (by a gravitational field) of classical and
quantum particles is considered and compared. It is suggested that the
differences in small angle scattering of particles with spin 0, 1, 2 are due to
the nonzero probability of forward scattering for particles described by a wave
packet. It is suggested that measurements of the deflection of light in the
vicinity of the Sun will decide which coordinate system is the privileged one.

34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat