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Title: Progress Toward A $2νββ$ Measurement For The MAJORNA DEMONSTRATOR

Abstract

The MAJORNA DEMONSTRATOR is a 76Ge-based neutrinoless double-beta decay (0νββ) experiment. Staged at the 4850 ft level of the Sanford Underground Research Facility, the DEMONSTRATOR operates an array of high-purity p-type point contact Ge detectors deployed within a graded passive shield and an active muon veto system. The present work concerns the two-neutrino double-beta decay mode (2νββ) of 76Ge. For Ge detectors, having superior energy resolution (0.1%), this mode poses negligible background to the 0νββ mode, even for a ton-scale experiment. However, the measurement of the 2νββ mode allows for careful systematics checks of active detector mass, enrichment fraction, and pulse shape discrimination cuts related to both the 0νββ and 2νββ decay modes. A precision measurement of the 2νββ shape also allows searches for spectral distortions, possibly indicative of new physics, including 0νββχ. Work is underway to construct a full experimental background model enabling a Bayesian fit to the measured energy spectrum and extraction of a precise 2νββ spectrum and half-life.

Authors:
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Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF), Particle Astrophysics and Nuclear Physics Programs; Sanford Underground Research Facility
Contributing Org.:
The MAJORNA Collaboration
OSTI Identifier:
1601291
Report Number(s):
PNNL-SA-130534
Journal ID: ISSN 1742-6588; TRN: US2103625
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 1342; Journal Issue: 2020; Conference: XV.International Conference on Topics in Astroparticle and Underground Physics , Sudbury, ON (Canada), 24–28 Jun 2017; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Gilliss, T., Abgrall, N., Alvis, S. I., Arnquist, Isaac J., Avignone, Frank T., Barabash, Alexander S., Barton, C. J., Bertrand, F. E., Bode, T., Bradley, A. W., Brudanin, V., Busch, Matthew, Buuck, M., Caldwell, Tom S., Chan, Yuen-Dat, Christofferson, C. D., Chu, P-H, Cuesta, C., Detwiler, Jason A., Dunagan, C., Efremenko, Yuri, Ejiri, H., Elliott, S. R., Giovanetti, Grahan K., Green, M. P., Gruszko, J., Guinn, I. S., Guiseppe, V. E., Haufe, C. R., Hehn, L., Henning, Reyco, Hoppe, Eric W., Howe, M. A., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, Richard T., Lopez, Andrew M., Martin, R. D., Massarczyk, Ralph, Meijer, S. J., Mertens, S., Myslik, Jordan W., O’Shaughnessy, C., Othman, G., Pettus, Walter C., Poon, Alan W. P., Radford, D. C., Rager, J., Reine, A. L., Rielage, Keith, Robertson, R. G. H., Ruof, N. W., Shanks, B., Shirchenko, M., Suriano, Anne-Marie, Tedeschi, D., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, Kris R., White, B. R., Wilkerson, J. F., Wiseman, Clint, Xu, Wenqin, Yakushev, E., Yu, Chang-Hong, Yumatov, Vladimir, Zhitnikov, I., and Zhu, B. X. Progress Toward A $2νββ$ Measurement For The MAJORNA DEMONSTRATOR. United States: N. p., 2019. Web. doi:10.1088/1742-6596/1342/1/012117.
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Gilliss, T., Abgrall, N., Alvis, S. I., Arnquist, Isaac J., Avignone, Frank T., Barabash, Alexander S., Barton, C. J., Bertrand, F. E., Bode, T., Bradley, A. W., Brudanin, V., Busch, Matthew, Buuck, M., Caldwell, Tom S., Chan, Yuen-Dat, Christofferson, C. D., Chu, P-H, Cuesta, C., Detwiler, Jason A., Dunagan, C., Efremenko, Yuri, Ejiri, H., Elliott, S. R., Giovanetti, Grahan K., Green, M. P., Gruszko, J., Guinn, I. S., Guiseppe, V. E., Haufe, C. R., Hehn, L., Henning, Reyco, Hoppe, Eric W., Howe, M. A., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, Richard T., Lopez, Andrew M., Martin, R. D., Massarczyk, Ralph, Meijer, S. J., Mertens, S., Myslik, Jordan W., O’Shaughnessy, C., Othman, G., Pettus, Walter C., Poon, Alan W. P., Radford, D. C., Rager, J., Reine, A. L., Rielage, Keith, Robertson, R. G. H., Ruof, N. W., Shanks, B., Shirchenko, M., Suriano, Anne-Marie, Tedeschi, D., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, Kris R., White, B. R., Wilkerson, J. F., Wiseman, Clint, Xu, Wenqin, Yakushev, E., Yu, Chang-Hong, Yumatov, Vladimir, Zhitnikov, I., & Zhu, B. X. Progress Toward A $2νββ$ Measurement For The MAJORNA DEMONSTRATOR. United States. https://doi.org/10.1088/1742-6596/1342/1/012117
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Gilliss, T., Abgrall, N., Alvis, S. I., Arnquist, Isaac J., Avignone, Frank T., Barabash, Alexander S., Barton, C. J., Bertrand, F. E., Bode, T., Bradley, A. W., Brudanin, V., Busch, Matthew, Buuck, M., Caldwell, Tom S., Chan, Yuen-Dat, Christofferson, C. D., Chu, P-H, Cuesta, C., Detwiler, Jason A., Dunagan, C., Efremenko, Yuri, Ejiri, H., Elliott, S. R., Giovanetti, Grahan K., Green, M. P., Gruszko, J., Guinn, I. S., Guiseppe, V. E., Haufe, C. R., Hehn, L., Henning, Reyco, Hoppe, Eric W., Howe, M. A., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, Richard T., Lopez, Andrew M., Martin, R. D., Massarczyk, Ralph, Meijer, S. J., Mertens, S., Myslik, Jordan W., O’Shaughnessy, C., Othman, G., Pettus, Walter C., Poon, Alan W. P., Radford, D. C., Rager, J., Reine, A. L., Rielage, Keith, Robertson, R. G. H., Ruof, N. W., Shanks, B., Shirchenko, M., Suriano, Anne-Marie, Tedeschi, D., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, Kris R., White, B. R., Wilkerson, J. F., Wiseman, Clint, Xu, Wenqin, Yakushev, E., Yu, Chang-Hong, Yumatov, Vladimir, Zhitnikov, I., and Zhu, B. X. Sun . "Progress Toward A $2νββ$ Measurement For The MAJORNA DEMONSTRATOR". United States. https://doi.org/10.1088/1742-6596/1342/1/012117. https://www.osti.gov/servlets/purl/1601291.
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@article{osti_1601291,
title = {Progress Toward A $2νββ$ Measurement For The MAJORNA DEMONSTRATOR},
author = {Gilliss, T. and Abgrall, N. and Alvis, S. I. and Arnquist, Isaac J. and Avignone, Frank T. and Barabash, Alexander S. and Barton, C. J. and Bertrand, F. E. and Bode, T. and Bradley, A. W. and Brudanin, V. and Busch, Matthew and Buuck, M. and Caldwell, Tom S. and Chan, Yuen-Dat and Christofferson, C. D. and Chu, P-H and Cuesta, C. and Detwiler, Jason A. and Dunagan, C. and Efremenko, Yuri and Ejiri, H. and Elliott, S. R. and Giovanetti, Grahan K. and Green, M. P. and Gruszko, J. and Guinn, I. S. and Guiseppe, V. E. and Haufe, C. R. and Hehn, L. and Henning, Reyco and Hoppe, Eric W. and Howe, M. A. and Keeter, K. J. and Kidd, M. F. and Konovalov, S. I. and Kouzes, Richard T. and Lopez, Andrew M. and Martin, R. D. and Massarczyk, Ralph and Meijer, S. J. and Mertens, S. and Myslik, Jordan W. and O’Shaughnessy, C. and Othman, G. and Pettus, Walter C. and Poon, Alan W. P. and Radford, D. C. and Rager, J. and Reine, A. L. and Rielage, Keith and Robertson, R. G. H. and Ruof, N. W. and Shanks, B. and Shirchenko, M. and Suriano, Anne-Marie and Tedeschi, D. and Trimble, J. E. and Varner, R. L. and Vasilyev, S. and Vetter, K. and Vorren, Kris R. and White, B. R. and Wilkerson, J. F. and Wiseman, Clint and Xu, Wenqin and Yakushev, E. and Yu, Chang-Hong and Yumatov, Vladimir and Zhitnikov, I. and Zhu, B. X.},
abstractNote = {The MAJORNA DEMONSTRATOR is a 76Ge-based neutrinoless double-beta decay (0νββ) experiment. Staged at the 4850 ft level of the Sanford Underground Research Facility, the DEMONSTRATOR operates an array of high-purity p-type point contact Ge detectors deployed within a graded passive shield and an active muon veto system. The present work concerns the two-neutrino double-beta decay mode (2νββ) of 76Ge. For Ge detectors, having superior energy resolution (0.1%), this mode poses negligible background to the 0νββ mode, even for a ton-scale experiment. However, the measurement of the 2νββ mode allows for careful systematics checks of active detector mass, enrichment fraction, and pulse shape discrimination cuts related to both the 0νββ and 2νββ decay modes. A precision measurement of the 2νββ shape also allows searches for spectral distortions, possibly indicative of new physics, including 0νββχ. Work is underway to construct a full experimental background model enabling a Bayesian fit to the measured energy spectrum and extraction of a precise 2νββ spectrum and half-life.},
doi = {10.1088/1742-6596/1342/1/012117},
journal = {Journal of Physics. Conference Series},
number = 2020,
volume = 1342,
place = {United States},
year = {2019},
month = {12}
}
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Works referenced in this record:

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