Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of Complex Time Structures in the Cosmic Ray Fluxes by the
  Alpha Magnetic Spectrometer on the ISS   We present high-statistics, precision measurements by AMS of the detailed
time and rigidity dependence of the primary cosmic-ray electron, positron,
proton and helium fluxes over 79 Bartels rotations from May 2011 to May 2017 in
the energy range from 1 to 50 GeV. For the first time, the charge-sign
dependent modulation during solar maximum has been investigated in detail by
leptons alone. We report the observation of short-term structures on the
timescale of months coincident in all the fluxes. These structures are not
visible in the positron-to-electron flux ratio. The precision measurements
across the solar polarity reversal show that the ratio exhibits a smooth
transition over ~800 days from one value to another.

19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
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
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th