Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recent results from the Alpha Magnetic Spectrometer (AMS) on the STS-91   The Alpha Magnetic Spectrometer (AMS) is a state of the art detector for the
extraterrestrial study of matter, antimatter and missing matter. During the ten
days long STS-91 precursor flight in may 1998 AMS collected nearly 100 millions
of Cosmic Rays on Low Earth Orbit, measuring with high accuracy their
composition. We present results on the flux of proton, electron, positron and
helium particles in the rigidity region 0.1 to 200 GV . Analysis of the under
cutoff spectra indicates the existence of a new type of belts containing high
energy particles and characterized by a dominance of positrons versus
electrons.

9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph