Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solar Neutrino Results from the Sudbury Neutrino Observatory   We describe here the measurement of the flux of neutrinos created by the
decay of solar ^8B by the Sudbury Neutrino Observatory (SNO). The neutrinos
were detected via the charged current (CC) reaction on deuterium and by the
elastic scattering (ES) of electrons. The CC reaction is sensitive exclusively
to $\nu_e$'s, while the ES reaction also has a small sensitivity to
$\nu_{\mu}$'s and $\nu_{\tau}$'s.
  The flux of $\nu_e$'s from ^8B decay measured by the CC reaction rate is
$\phi^CC (\nu_e) = 1.75 \pm 0.07 (stat.)^{+0.1 2}_{-0.11} (sys.) \pm 0.05
(theor.) \times 10^6 cm^-2 s^-1$. Assuming no flavor transformation, the flux
inferred from the ES reaction rate is $\phi^ES (\nu_x)=2.39\pm 0.34 (stat.)
^{+0.16}_{-0.14} (sys.) \times 10^6 cm^-2 s^-1$.
  Comparison of $\phi^CC (\nu_e)$ to the Super-Kamiokande Collaboration's
precision value of $\phi^ES (\nu_x)$ yields a $3.3\sigma$ difference, assuming
the systematic uncertainties are normally distributed, providing evidence that
there is a non-electron flavor active neutrino component in the solar flux. The
total flux of active ^8B neutrinos is thus determined to be $5.44\pm 0.99
\times 10^6 cm^-2 s^-1$, in close agreement with the predictions of solar
models.

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The categories of this paper are: quant-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
9
The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga