Limits on {nu}{sub e} and {nu}{sub e} disappearance from Gallium and reactor experiments

The deficit observed in the Gallium radioactive source experiments is interpreted as a possible indication of the disappearance of electron neutrinos. In the effective framework of two-neutrino mixing we obtain sin{sup 2}2{theta} > or approx. 0.03 and {delta}m{sup 2} > or approx. 0.1 eV{sup 2}...

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Veröffentlicht in:Physical review. D, Particles and fields Particles and fields, 2008-10, Vol.78 (7)
Hauptverfasser: Acero, Mario A., INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino, Laboratoire d'Annecy-le-Vieux de Physique Thorique LAPTH, Universite de Savoie, CNRS/IN2P3, 74941 Annecy-le-vieux, Giunti, Carlo, Laveder, Marco
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Sprache:eng
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Zusammenfassung:The deficit observed in the Gallium radioactive source experiments is interpreted as a possible indication of the disappearance of electron neutrinos. In the effective framework of two-neutrino mixing we obtain sin{sup 2}2{theta} > or approx. 0.03 and {delta}m{sup 2} > or approx. 0.1 eV{sup 2}. The compatibility of this result with the data of the Bugey and Chooz reactor short-baseline antineutrino disappearance experiments is studied. It is found that the Bugey data present a hint of neutrino oscillations with 0.02 < or approx. sin{sup 2}2{theta} < or approx. 0.08 and {delta}m{sup 2}{approx_equal}1.8 eV{sup 2}, which is compatible with the Gallium allowed region of the mixing parameters. This hint persists in the combined analyses of Bugey and Chooz data, of Gallium and Bugey data, and of Gallium, Bugey, and Chooz data.
ISSN:0556-2821
1089-4918
DOI:10.1103/PHYSREVD.78.073009