Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Implication of Combined Solar Neutrino Observation and their Theoretical
  Uncertainties   Constraints on the core temperature (T_c) of the Sun and on neutrino-
oscillation parameters are obtained from the existing solar neutrino data,
including the recent GALLEX and Kamiokande III results. (1) A purely
astrophysical solution to the solar neutrino problem is strongly disfavored by
the data: the best fit in a cooler Sun model requires an 8% reduction in T_c,
but the chi-sqaured test rejects this hypothesis at 99.99% C.L., suggesting new
neutrino physics. (2) Assuming the Standard Solar Model (SSM) and MSW
oscillations, the MSW parameters are constrained to two small regions: one in
the non-adiabatic region and the other in the large-mixing region. The
non-adiabatic solution gives a considerably better fit. For nu_e oscillations
into sterile neutrinos, the allowed region (90%) is constrained to non-
adiabatic oscillations. As long as the SSM is assumed, the neutrino mixing
angles are at least four times larger, or considerably smaller, than the
corresponding quark mixing angles. (3) Allowing both MSW oscillations and a
non-standard core temperature, a) the experiments determine the core
temperature at the 5% level, yielding a value consistent with the SSM
prediction. b) When T_c is used as a free parameter, the allowed MSW region is
broadened: a cooler Sun (T_c=0.95) allows mass and mixing implied by the SUSY
SO(10) GUT, while a warmer Sun (T_c=1.05) allows parameter space suggested by
intermediate-scale SO(10) GUTs. Superstring-inspired models are consistent with
all solutions. (4) From the narrowed parameter space, we predict the neutrino
spectral shape which should be observed in SNO. Throughout the calculation we
use the latest Bahcall-Pinsonneault SSM, and include nuclear and astrophysical
uncertainties in a simplified, but physically transparent way.

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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: acc-phys
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The categories of this paper are: cs
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph