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arXiv · 1608.07340

The Majorana Demonstrator search for neutrinoless double beta decay

C. Cuesta·M. Buuck·J. A. Detwiler·J. Gruszko·I. S. Guinn·J. Leon·R. G. H. Robertson·N. Abgrall·A. W. Bradley·Y-D. Chan·S. Mertens·A. W. P. Poon·K. Vetter·I. J. Arnquist·E. W. Hoppe·R. T. Kouzes·J. L. Orrell·F. T. Avignone III·A. S. Barabash·S. I. Konovalov·V. Yumatov·F. E. Bertrand·A. Galindo-Uribarri·D. C. Radford·R. L. Varner·C. -H. Yu·V. Brudanin·M. Shirchenko·S. Vasilyev·E. Yakushev·I. Zhitnikov·M. Busch·T. S. Caldwell·T. Gilliss·R. Henning·M. A. Howe·J. MacMullin·S. J. Meijer·C. O'Shaughnessy·J. Rager·B. Shanks·J. E. Trimble·K. Vorren·W. Xu·C. D. Christofferson·C. Dunagan·A. M. Suriano·P. -H. Chu·S. R. Elliott·R. Massarczyk·K. Rielage·B. R. White·Yu. Efremenko·A. M. Lopez·H. Ejiri·A. Fullmer·G. K. Giovanetti·M. P. Green·V. E. Guiseppe·D. Tedeschi·C. Wiseman·B. R. Jasinski·K. J. Keeter·M. F. Kidd·R. D. Martin·E. Romero-Romero·J. F. Wilkerson
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Abstract

The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, an ultra-low background, modular, HPGe detector array with a mass of 44.8-kg (29.7 kg enriched >88% in Ge-76) to search for neutrinoless double beta decay in Ge-76. The next generation of tonnescale Ge-based neutrinoless double beta decay searches will probe the neutrino mass scale in the inverted-hierarchy region. The MAJORANA DEMONSTRATOR is envisioned to demonstrate a path forward to achieve a background rate at or below 1 count/tonne/year in the 4 keV region of interest around the Q-value of 2039 keV. The MAJORANA DEMONSTRATOR follows a modular implementation to be easily scalable to the next generation experiment. First data taken with the DEMONSTRATOR are introduced here.

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C. Cuesta, M. Buuck, J. A. Detwiler, J. Gruszko, I. S. Guinn, J. Leon, R. G. H. Robertson, N. Abgrall, A. W. Bradley, Y-D. Chan, S. Mertens, A. W. P. Poon, K. Vetter, I. J. Arnquist, E. W. Hoppe, R. T. Kouzes, J. L. Orrell, F. T. Avignone III, A. S. Barabash, S. I. Konovalov, V. Yumatov, F. E. Bertrand, A. Galindo-Uribarri, D. C. Radford, R. L. Varner, C. -H. Yu, V. Brudanin, M. Shirchenko, S. Vasilyev, E. Yakushev, I. Zhitnikov, M. Busch, T. S. Caldwell, T. Gilliss, R. Henning, M. A. Howe, J. MacMullin, S. J. Meijer, C. O'Shaughnessy, J. Rager, B. Shanks, J. E. Trimble, K. Vorren, W. Xu, C. D. Christofferson, C. Dunagan, A. M. Suriano, P. -H. Chu, S. R. Elliott, R. Massarczyk, K. Rielage, B. R. White, Yu. Efremenko, A. M. Lopez, H. Ejiri, A. Fullmer, G. K. Giovanetti, M. P. Green, V. E. Guiseppe, D. Tedeschi, C. Wiseman, B. R. Jasinski, K. J. Keeter, M. F. Kidd, R. D. Martin, E. Romero-Romero, J. F. Wilkerson. 2016-08-25. The Majorana Demonstrator search for neutrinoless double beta decay. https://arxiv.org/abs/1608.07340

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