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Title: The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge

Abstract

Neutrinoless double-beta (0νββ) decay is a hypothesized process where in some even-even nuclei it might be possible for two neutrons to simultaneously decay into two protons and two electrons without emitting neutrinos. This is possible only if neutrinos are Majorana particles, i.e. fermions that are their own antiparticles. Neutrinos being Majorana particles would explicitly violate lepton number conservation, and might play a role in the matter-antimatter asymmetry in the universe. The observation of neutrinoless double-beta decay would also provide complementary information related to neutrino masses. The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, a 40-kg modular germanium detector array, to search for the 0νββ decay of 76Ge and to demonstrate a background rate at or below 3 counts/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039 keV Q-value for 76Ge 0νββ decay. In this paper, we discuss the physics of neutrinoless double beta decay and then focus on the MAJORANA DEMONSTRATOR, including its design and approach to achieve ultra-low backgrounds and the status of the experiment.

Authors:
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Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Majorana Collaboration
OSTI Identifier:
1452873
Report Number(s):
PNNL-SA-112304
Journal ID: ISSN 1742-6588; KB0401022
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 606; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

Citation Formats

Xu, W., Abgrall, N., Avignone, F. T., Barabash, A. S., Bertrand, F. E., Brudanin, V., Busch, M., Buuck, M., Byram, D., Caldwell, A. S., Chan, Y-D, Christofferson, C. D., Cuesta, C., Detwiler, J. A., Efremenko, Yu, Ejiri, H., Elliott, S. R., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Green, M. P., Gruszko, J., Guinn, I., Guiseppe, V. E., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Jasinski, B. R., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., MacMullin, J., Martin, R. D., Meijer, S. J., Mertens, S., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Poon, A. W. P., Radford, D. C., Rager, J., Rielage, K., Robertson, R. G. H., Romero-Romero, E., Ronquest, M. C., Shanks, B., Shirchenko, M., Snyder, N., Suriano, A. M., Tedeschi, D., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Yakushev, E., Yu, C-H, and Yumatov, V. The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge. United States: N. p., 2015. Web. doi:10.1088/1742-6596/606/1/012004.
Xu, W., Abgrall, N., Avignone, F. T., Barabash, A. S., Bertrand, F. E., Brudanin, V., Busch, M., Buuck, M., Byram, D., Caldwell, A. S., Chan, Y-D, Christofferson, C. D., Cuesta, C., Detwiler, J. A., Efremenko, Yu, Ejiri, H., Elliott, S. R., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Green, M. P., Gruszko, J., Guinn, I., Guiseppe, V. E., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Jasinski, B. R., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., MacMullin, J., Martin, R. D., Meijer, S. J., Mertens, S., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Poon, A. W. P., Radford, D. C., Rager, J., Rielage, K., Robertson, R. G. H., Romero-Romero, E., Ronquest, M. C., Shanks, B., Shirchenko, M., Snyder, N., Suriano, A. M., Tedeschi, D., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Yakushev, E., Yu, C-H, & Yumatov, V. The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge. United States. doi:10.1088/1742-6596/606/1/012004.
Xu, W., Abgrall, N., Avignone, F. T., Barabash, A. S., Bertrand, F. E., Brudanin, V., Busch, M., Buuck, M., Byram, D., Caldwell, A. S., Chan, Y-D, Christofferson, C. D., Cuesta, C., Detwiler, J. A., Efremenko, Yu, Ejiri, H., Elliott, S. R., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Green, M. P., Gruszko, J., Guinn, I., Guiseppe, V. E., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Jasinski, B. R., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., MacMullin, J., Martin, R. D., Meijer, S. J., Mertens, S., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Poon, A. W. P., Radford, D. C., Rager, J., Rielage, K., Robertson, R. G. H., Romero-Romero, E., Ronquest, M. C., Shanks, B., Shirchenko, M., Snyder, N., Suriano, A. M., Tedeschi, D., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Yakushev, E., Yu, C-H, and Yumatov, V. Fri . "The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge". United States. doi:10.1088/1742-6596/606/1/012004.
@article{osti_1452873,
title = {The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge},
author = {Xu, W. and Abgrall, N. and Avignone, F. T. and Barabash, A. S. and Bertrand, F. E. and Brudanin, V. and Busch, M. and Buuck, M. and Byram, D. and Caldwell, A. S. and Chan, Y-D and Christofferson, C. D. and Cuesta, C. and Detwiler, J. A. and Efremenko, Yu and Ejiri, H. and Elliott, S. R. and Galindo-Uribarri, A. and Giovanetti, G. K. and Goett, J. and Green, M. P. and Gruszko, J. and Guinn, I. and Guiseppe, V. E. and Henning, R. and Hoppe, E. W. and Howard, S. and Howe, M. A. and Jasinski, B. R. and Keeter, K. J. and Kidd, M. F. and Konovalov, S. I. and Kouzes, R. T. and LaFerriere, B. D. and Leon, J. and MacMullin, J. and Martin, R. D. and Meijer, S. J. and Mertens, S. and Orrell, J. L. and O'Shaughnessy, C. and Overman, N. R. and Poon, A. W. P. and Radford, D. C. and Rager, J. and Rielage, K. and Robertson, R. G. H. and Romero-Romero, E. and Ronquest, M. C. and Shanks, B. and Shirchenko, M. and Snyder, N. and Suriano, A. M. and Tedeschi, D. and Trimble, J. E. and Varner, R. L. and Vasilyev, S. and Vetter, K. and Vorren, K. and White, B. R. and Wilkerson, J. F. and Wiseman, C. and Yakushev, E. and Yu, C-H and Yumatov, V.},
abstractNote = {Neutrinoless double-beta (0νββ) decay is a hypothesized process where in some even-even nuclei it might be possible for two neutrons to simultaneously decay into two protons and two electrons without emitting neutrinos. This is possible only if neutrinos are Majorana particles, i.e. fermions that are their own antiparticles. Neutrinos being Majorana particles would explicitly violate lepton number conservation, and might play a role in the matter-antimatter asymmetry in the universe. The observation of neutrinoless double-beta decay would also provide complementary information related to neutrino masses. The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, a 40-kg modular germanium detector array, to search for the 0νββ decay of 76Ge and to demonstrate a background rate at or below 3 counts/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039 keV Q-value for 76Ge 0νββ decay. In this paper, we discuss the physics of neutrinoless double beta decay and then focus on the MAJORANA DEMONSTRATOR, including its design and approach to achieve ultra-low backgrounds and the status of the experiment.},
doi = {10.1088/1742-6596/606/1/012004},
journal = {Journal of Physics. Conference Series},
issn = {1742-6588},
number = ,
volume = 606,
place = {United States},
year = {2015},
month = {5}
}

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