Search for neutrinoless double-beta decay in Xe136 with EXO-200

M. Auger, D. J. Auty, P. S. Barbeau, E. Beauchamp, V. Belov, C. Benitez-Medina, M. Breidenbach, T. Brunner, A. Burenkov, B. Cleveland, S. Cook, T. Daniels, M. Danilov, C. G. Davis, S. Delaquis, R. Devoe, A. Dobi, M. J. Dolinski, A. Dolgolenko, M. DunfordW. Fairbank, J. Farine, W. Feldmeier, P. Fierlinger, D. Franco, G. Giroux, R. Gornea, K. Graham, G. Gratta, C. Hall, K. Hall, C. Hargrove, S. Herrin, M. Hughes, A. Johnson, T. N. Johnson, A. Karelin, L. J. Kaufman, A. Kuchenkov, K. S. Kumar, D. S. Leonard, F. Leonard, D. MacKay, R. MacLellan, M. Marino, B. Mong, M. Montero Díez, A. R. Müller, R. Neilson, R. Nelson, A. Odian, I. Ostrovskiy, K. O'Sullivan, C. Ouellet, A. Piepke, A. Pocar, C. Y. Prescott, K. Pushkin, P. C. Rowson, J. J. Russell, A. Sabourov, D. Sinclair, S. Slutsky, V. Stekhanov, T. Tolba, D. Tosi, K. Twelker, P. Vogel, J. L. Vuilleumier, A. Waite, T. Walton, M. Weber, U. Wichoski, J. Wodin, J. D. Wright, L. Yang, Y. R. Yen, O. Ya Zeldovich

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389 Scopus citations

Abstract

We report on a search for neutrinoless double-beta decay of Xe136 with EXO-200. No signal is observed for an exposure of 32.5 kgyr, with a background of ∼1.5×10 -3kg -1yr -1keV -1 in the ±1σ region of interest. This sets a lower limit on the half-life of the neutrinoless double-beta decay T1/20νββ(Xe136) >1.6×1025yr (90% C.L.), corresponding to effective Majorana masses of less than 140-380 meV, depending on the matrix element calculation.

Original languageEnglish
Article number032505
JournalPhysical Review Letters
Volume109
Issue number3
DOIs
StatePublished - Jul 19 2012

ASJC Scopus subject areas

  • General Physics and Astronomy

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