Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Explaining the MiniBooNE excess by a decaying sterile neutrino with mass
  in the 250 MeV range   The MiniBooNE collaboration has reported an excess of $460.5\pm 95.8$
electron-like events ($4.8\sigma$). We propose an explanation of these events
in terms of a sterile neutrino decaying into a photon and a light neutrino. The
sterile neutrino has a mass around 250 MeV and it is produced from kaon decays
in the proton beam target via mixing with the muon or the electron in the range
$10^{-11} \lesssim |U_{\ell 4}|^2 \lesssim 10^{-7}$ ($\ell = e,\mu$). The model
can be tested by considering the time distribution of the events in MiniBooNE
and by looking for single-photon events in running or upcoming neutrino
experiments, in particular by the suite of liquid argon detectors in the
short-baseline neutrino program at Fermilab.

31
The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
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The categories of this paper are: stat
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
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The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ