Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A High Sensitivity Search for $\bar{\nu}_{e}$'s from the Sun and Other
  Sources at KamLAND   Data corresponding to a KamLAND detector exposure of 0.28 kton-year has been
used to search for $\bar{\nu}_e$'s in the energy range 8.3 MeV $<$
E$_{\bar{\nu}_e}$ $<$ 14.8 MeV. No candidates were found for an expected
background of $1.1{\pm}0.4$ events. This result can be used to obtain a limit
on $\bar{\nu}_{e}$ fluxes of any origin. Assuming that all $\bar{\nu}_e$ flux
has its origin in the Sun and has the characteristic $^8$B solar $\nu_e$ energy
spectrum, we obtain an upper limit of 3.7 \times 10$^2$ cm$^{-2}$ s$^{-1}$ (90%
C.L.) on the $\bar{\nu}_e$ flux. We interpret this limit, corresponding to
$2.8{\times}10^{-4}$ of the Standard Solar Model $^8$B $\nu_e$ flux, in the
framework of spin--flavor precession and neutrino decay models.

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The categories of this paper are: q-alg
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
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The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: stat
0
The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: alg-geom