Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Tokyo Axion Helioscope Experiment   A preliminary result of the solar axion search experiment at the University
of Tokyo is presented. We searched for axions which could be produced in the
solar core by exploiting the axion helioscope. The helioscope consists of a
superconducting magnet with field strength of 4 Tesla over 2.3 meters. From the
absence of the axion signal we set a 95 % confidence level upper limit on the
axion coupling to two photons $g_{a\gamma\gamma} < 6.0 \times 10^{-10}
GeV^{-1}$ for the axion mass $m_a < 0.03$ eV. This is the first solar axion
search experiment whose sensitivity to $g_{a\gamma\gamma}$ exceeds the limit
inferred from the solar age consideration.

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The categories of this paper are: hep-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph