Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Successive Measurements of Cosmic-Ray Antiproton Spectrum in a Positive
  Phase of the Solar Cycle   The energy spectrum of cosmic-ray antiprotons has been measured by BESS
successively in 1993, 1995, 1997 and 1998. In total, 848 antiprotons were
clearly identified in energy range 0.18 to 4.20 GeV. From these successive
measurements of the antiproton spectrum at various solar activity, we discuss
about the effect of the solar modulation and the origin of cosmic-ray
antiprotons. Measured antiproton ratios were nearly identical during this
period, and were consistent with a prediction taking the charge dependent solar
modulation into account.

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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga