Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the flux and zenith-angle distribution of upward
  through-going muons by Super-Kamiokande   A total of 614 upward through-going muons of minimum energy 1.6 GeV are
observed by Super-Kamiokande during 537 detector live days. The measured muon
flux is 1.74+/-0.07(stat.)+/-0.02(sys.)x10^{-13}cm^{-2}s^{-1}sr^{-1} compared
to an expected flux of 1.97+/-0.44(theo.)x10^{-13}cm^{-2}s^{-1}sr^{-1}. The
absolute measured flux is in agreement with the prediction within the errors.
However, the zenith angle dependence of the observed upward through-going muon
flux does not agree with no-oscillation predictions. The observed distortion in
shape is consistent with the \nu_\mu <-> \nu_\tau oscillation hypothesis with
\sin^22\theta > 0.4 and 1x10^{-3} < \Delta m^2 < 1x10^{-1} eV^{2} at 90%
confidence level.

33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
21
The categories of this paper are: adap-org