Improved measurement of the 2 ν β β half-life of 136 Xe with the EXO-200 detector

J. B. Albert, M. Auger, D. J. Auty, P. S. Barbeau, E. Beauchamp, D. Beck, V. Belov, C. Benitez-Medina, J. Bonatt, M. Breidenbach, T. Brunner, A. Burenkov, G. F. Cao, C. Chambers, J. Chaves, B. Cleveland, S. Cook, A. Craycraft, T. Daniels, M. DanilovS. J. Daugherty, C. G. Davis, J. Davis, R. Devoe, S. Delaquis, A. Dobi, A. Dolgolenko, M. J. Dolinski, M. Dunford, W. Fairbank, J. Farine, W. Feldmeier, P. Fierlinger, D. Franco, D. Fudenberg, G. Giroux, R. Gornea, K. Graham, G. Gratta, C. Hall, K. Hall, C. Hargrove, S. Herrin, M. Hughes, X. S. Jiang, A. Johnson, T. N. Johnson, S. Johnston, A. Karelin, L. J. Kaufman, R. Killick, S. Kravitz, A. Kuchenkov, K. S. Kumar, D. S. Leonard, F. Leonard, C. Licciardi, R. Maclellan, M. G. Marino, B. Mong, M. Montero Díez, D. Moore, R. Nelson, K. O'Sullivan, A. Odian, I. Ostrovskiy, C. Ouellet, A. Piepke, A. Pocar, C. Y. Prescott, A. Rivas, P. C. Rowson, M. P. Rozo, J. J. Russell, A. Sabourov, D. Sinclair, K. Skarpaas, S. Slutsky, V. Stekhanov, V. Strickland, M. Tarka, T. Tolba, D. Tosi, K. Twelker, P. Vogel, J. L. Vuilleumier, A. Waite, J. Walton, T. Walton, M. Weber, L. J. Wen, U. Wichoski, J. Wodin, J. D. Wright, L. Yang, Y. R. Yen, O. Ya Zeldovich, Y. B. Zhao

Producción científica: Articlerevisión exhaustiva

173 Citas (Scopus)

Resumen

We report on an improved measurement of the 2νββ half-life of 136Xe performed by EXO-200. The use of a large and homogeneous time-projection chamber allows for the precise estimate of the fiducial mass used for the measurement, resulting in a small systematic uncertainty. We also discuss in detail the data-analysis methods used for double-β decay searches with EXO-200, while emphasizing those directly related to the present measurement. The 136Xe 2νββ half-life is found to be T1/22νββ = 2.165±0.016(stat)±0.059(sys)×1021 yr. This is the most precisely measured half-life of any 2νββ decay to date.

Idioma originalEnglish
Número de artículo015502
PublicaciónPhysical Review C - Nuclear Physics
Volumen89
N.º1
DOI
EstadoPublished - ene 28 2014

Financiación

FinanciadoresNúmero del financiador
National Science Foundation Arctic Social Science Program1307362, 1205977
National Science Foundation Arctic Social Science Program

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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