Global and unified analysis of solar neutrino data - INSPIRE

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Global and unified analysis of solar neutrino data

Sep, 2000

18 pages

Part of Neutrino physics and astrophysics. Proceedings, 19th International Conference, Neutrino 2000, Sudbury, Canada, June 16-21, 2000, 80-88

Published in:

Nucl.Phys.B Proc.Suppl. 91 (2001) 80-88

Contribution to:

- Neutrino 2000
, 80-88

e-Print:

hep-ph/0009041 [hep-ph]

DOI:

10.1016/S0920-5632(00)00926-9

Report number:

IFIC-00-50

View in:

ADS Abstract Service

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Abstract:

We discuss the status of the solutions of the solar neutrino problem in terms of oscillations of

\nu_e

into active or sterile neutrinos. We present the results of a global fit to the full data set corresponding to the latest data presented at the

\nu

-2000 conference. We show the possible solutions in the full parameter space including both MSW and vacuum, as well as quasi-vacuum oscillations (QVO) and matter effects for mixing angles in the second octant (the so called dark side). Our conclusion is that from the statistical point of view, all solutions for oscillations into active neutrinos: LMA, LOW, SMA and the QVO solutions are acceptable since they all provide a reasonable GOF to the full data set. The same holds for the SMA solution for oscillations into sterile neutrinos. LMA and LOW-QVO solutions for oscillations into active neutrinos seem slightly favoured over SMA solutions for oscillations into active or sterile neutrinos. We also analyze the dependence of these conclusions on the uncertainty of the SSM

^8

B flux and on the removal of the data from one of the experimental rates. We also present the results in the framework of four neutrino oscillations which allows for oscillations into a state which is a combination of active and sterile neutrino.

Note:

18 pages with 18 postscript figures included (some of them bitmapped for compression, better resolution at http://ific.uv.es/~penya) Report-no: IFIC/00-50

talk: Sudbury 2000/06/16
neutrino: solar
neutrino: oscillation
data analysis method
time dependence
electron: recoil
energy spectrum
neutrino: sterile
numerical calculations: interpretation of experiments

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