Observation of two-neutrino double-beta decay in 136Xe with the EXO-200 detector.

Ackerman, N; Aharmim, B; Auger, M; Auty, D J; Barbeau, P S; Barry, K; Bartoszek, L; Beauchamp, E; Belov, V; Benitez-Medina, C; Breidenbach, M; Burenkov, A; Cleveland, B; Conley, R; Conti, E; Cook, J; Cook, S; Coppens, A; Counts, I; Craddock, W; Daniels, T; Danilov, M V; Davis, C G; Davis, J; deVoe, R; Djurcic, Z; Dobi, A; Dolgolenko, A G; Dolinski, M J; Donato, K; Dunford, M; Fairbank, W; Farine, J; Fierlinger, P; Franco, D; Freytag, D; Giroux, G; Gornea, R; Graham, K; Gratta, G; Green, M P; Hägemann, C; Hall, C; Hall, K; Haller, G; Hargrove, C; Herbst, R; Herrin, S; Hodgson, J; Hughes, M

Ackerman, N; Aharmim, B; Auger, M; Auty, D J; Barbeau, P S; Barry, K; Bartoszek, L; Beauchamp, E; Belov, V; Benitez-Medina, C; Breidenbach, M; Burenkov, A; Cleveland, B; Conley, R; Conti, E; Cook, J; Cook, S; Coppens, A; Counts, I; Craddock, W; Daniels, T; Danilov, M V; Davis, C G; Davis, J; deVoe, R; Djurcic, Z; Dobi, A; Dolgolenko, A G; Dolinski, M J; Donato, K; Dunford, M; Fairbank, W; Farine, J; Fierlinger, P; Franco, D; Freytag, D; Giroux, G; Gornea, R; Graham, K; Gratta, G; Green, M P; Hägemann, C; Hall, C; Hall, K; Haller, G; Hargrove, C; Herbst, R; Herrin, S; Hodgson, J; Hughes, M.

Afiliación

Ackerman N; SLAC National Accelerator Laboratory, Stanford, California, USA.

Phys Rev Lett ; 107(21): 212501, 2011 Nov 18.

Article en En | MEDLINE | ID: mdl-22181874

ABSTRACT

ABSTRACT

We report the observation of two-neutrino double-beta decay in (136)Xe with T(1/2) = 2.11 ± 0.04(stat) ± 0.21(syst) × 10(21) yr. This second-order process, predicted by the standard model, has been observed for several nuclei but not for (136)Xe. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrinoless double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.

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Bases de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Phys Rev Lett Año: 2011 Tipo del documento: Article País de afiliación: Estados Unidos

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PubMed Links

Bases de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Phys Rev Lett Año: 2011 Tipo del documento: Article País de afiliación: Estados Unidos