Search for 2 nu beta beta decay of Xe-136 to the 0(1)(+) excited state of Ba-136 with the EXO-200 liquid xenon detector

TitleSearch for 2 nu beta beta decay of Xe-136 to the 0(1)(+) excited state of Ba-136 with the EXO-200 liquid xenon detector
Publication TypeJournal Article
Year of Publication2016
AuthorsAlbert, J. B., D. J. Auty, P. S. Barbeau, D. Beck, V. Belov, M. Breidenbach, T. Brunner, A. Burenkov, G. F. Cao, C. Chambers, J. Chaves, B. Cleveland, M. Coon, A. Craycraft, T. Daniels, M. Danilov, S. J. Daugherty, J. Davis, S. Delaquis, A. D. Mesrobian-Kabakian, R. DeVoe, T. Didberidze, J. Dilling, A. Dolgolenko, M. J. Dolinski, M. Dunford, W. Fairbank, J. Farine, W. Feldmeier, S. Feyzbakhsh, P. Fierlinger, D. Fudenberg, R. Gornea, K. Graham, G. Gratta, C. Hall, M. Hughes, M. J. Jewell, A. Johnson, T. N. Johnson, S. Johnston, A. Karelin, L. J. Kaufman, R. Killick, J. King, T. Koffas, S. Kravitz, R. Krucken, A. Kuchenkov, K. S. Kumar, D. S. Leonard, C. Licciardi, Y. H. Lin, J. Ling, R. MacLellan, M. G. Marino, B. Mong, D. Moore, O. Njoya, R. Nelson, A. Odian, I. Ostrovskiy, A. Piepke, A. Pocar, C. Y. Prescott, F. Retiere, P. C. Rowson, J. J. Russell, A. Schubert, D. Sinclair, E. Smith, V. Stekhanov, M. Tarka, T. Tolba, R. Tsang, K. Twelker, P. Vogel, J. L. Vuilleumier, A. Waite, J. Walton, T. Walton, M. Weber, L. J. Wen, U. Wichoski, T. A. Winick, J. Wood, Q. Y. Xu, L. Yang, Y. R. Yen, O. Y. Zeldovich, and E. X. O. Collaboration
JournalPhysical Review C
Volume93
Issue3
Pagination9
Date PublishedMar
Type of ArticleArticle
ISBN Number2469-9985
Accession NumberWOS:000371740600008
Keywordsdouble-beta decay, mo-100, Physics, ru-100
AbstractEXO-200 is a single phase liquid xenon detector designed to search for neutrinoless pp decay of Xe-136 to the ground state of Ba-136. We report here on a search for the two -neutrino pp decay of Xe-136 to the first 0+ excited state, 0(1)(+), of Ba-136 based on a 100 kg yr exposure of Xe-136. Using a specialized analysis employing a machine learning algorithm, we obtain a 90% CL half-life sensitivity of 1.7 x 10(24) yr. We find no statistically significant evidence for the 20P decay to the excited state resulting in a lower limit of Ti-1/2(7 nu) (0(+) -> 0(1)(+)) > 6.9 x10(23) yr at 90% CL. This observed limit is consistent with the estimated half-life of 2.5 x 10(25) yr.
URL<Go to ISI>://WOS:000371740600008
DOI10.1103/PhysRevC.93.035501
Short TitleSearch for 2 nu beta beta decay of Xe-136 to the 0(1)(+) excited state of Ba-136 with the EXO-200 liquid xenon detector
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