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

Research output: Contribution to journalArticlepeer-review


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 (US)
Article number032505
JournalPhysical review letters
Issue number3
StatePublished - Jul 19 2012
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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