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Title: Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector

Abstract

Results from a search for neutrinoless double-beta decay (0νββ) of 136Xe are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detector has been improved to σ/E = 1.23 % , the electric field in the drift region has been raised by 50%, and a system to suppress radon in the volume between the cryostat and lead shielding has been implemented. In addition, analysis techniques that improve topological discrimination between 0νββ and background events have been developed. Incorporating these hardware and analysis improvements, the median 90% confidence level 0νββ half-life sensitivity after combining with the full data set acquired before the upgrade has increased twofold to 3.7 × 10 25 yr . Finally, no statistically significant evidence for 0νββ is observed, leading to a lower limit on the 0νββ half-life of 1.8 × 10 25 yr at the 90% confidence level.

Authors:
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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
EXO-200 Collaboration
OSTI Identifier:
1421313
Alternate Identifier(s):
OSTI ID: 1423521
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 7; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Neutrinoless double-beta decay

Citation Formats

Albert, J. B., Anton, G., Badhrees, I., Barbeau, P. S., Bayerlein, R., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Cree, W., Daniels, T., Danilov, M., Daugherty, S. J., Daughhetee, J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Fairbank, W., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Hansen, E. V., Hoessl, J., Hufschmidt, P., Hughes, M., Jamil, A., Jewell, M. J., Johnson, A., Johnston, S., Karelin, A., Kaufman, L. J., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Leonard, D. S., Li, G. S., Li, S., Licciardi, C., Lin, Y. H., MacLellan, R., Michel, T., Mong, B., Moore, D., Murray, K., Nelson, R., Njoya, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Retière, F., Rowson, P. C., Russell, J. J., Schmidt, S., Schubert, A., Sinclair, D., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Vogel, P., Vuilleumier, J. -L., Wagenpfeil, M., Waite, A., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wrede, G., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., Zettlemoyer, J., and Ziegler, T. Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector. United States: N. p., 2018. Web. doi:10.1103/physrevlett.120.072701.
Albert, J. B., Anton, G., Badhrees, I., Barbeau, P. S., Bayerlein, R., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Cree, W., Daniels, T., Danilov, M., Daugherty, S. J., Daughhetee, J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Fairbank, W., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Hansen, E. V., Hoessl, J., Hufschmidt, P., Hughes, M., Jamil, A., Jewell, M. J., Johnson, A., Johnston, S., Karelin, A., Kaufman, L. J., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Leonard, D. S., Li, G. S., Li, S., Licciardi, C., Lin, Y. H., MacLellan, R., Michel, T., Mong, B., Moore, D., Murray, K., Nelson, R., Njoya, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Retière, F., Rowson, P. C., Russell, J. J., Schmidt, S., Schubert, A., Sinclair, D., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Vogel, P., Vuilleumier, J. -L., Wagenpfeil, M., Waite, A., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wrede, G., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., Zettlemoyer, J., & Ziegler, T. Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector. United States. doi:10.1103/physrevlett.120.072701.
Albert, J. B., Anton, G., Badhrees, I., Barbeau, P. S., Bayerlein, R., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Cree, W., Daniels, T., Danilov, M., Daugherty, S. J., Daughhetee, J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Fairbank, W., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Hansen, E. V., Hoessl, J., Hufschmidt, P., Hughes, M., Jamil, A., Jewell, M. J., Johnson, A., Johnston, S., Karelin, A., Kaufman, L. J., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Leonard, D. S., Li, G. S., Li, S., Licciardi, C., Lin, Y. H., MacLellan, R., Michel, T., Mong, B., Moore, D., Murray, K., Nelson, R., Njoya, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Retière, F., Rowson, P. C., Russell, J. J., Schmidt, S., Schubert, A., Sinclair, D., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Vogel, P., Vuilleumier, J. -L., Wagenpfeil, M., Waite, A., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wrede, G., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., Zettlemoyer, J., and Ziegler, T. Thu . "Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector". United States. doi:10.1103/physrevlett.120.072701.
@article{osti_1421313,
title = {Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector},
author = {Albert, J. B. and Anton, G. and Badhrees, I. and Barbeau, P. S. and Bayerlein, R. and Beck, D. and Belov, V. and Breidenbach, M. and Brunner, T. and Cao, G. F. and Cen, W. R. and Chambers, C. and Cleveland, B. and Coon, M. and Craycraft, A. and Cree, W. and Daniels, T. and Danilov, M. and Daugherty, S. J. and Daughhetee, J. and Davis, J. and Delaquis, S. and Der Mesrobian-Kabakian, A. and DeVoe, R. and Didberidze, T. and Dilling, J. and Dolgolenko, A. and Dolinski, M. J. and Fairbank, W. and Farine, J. and Feyzbakhsh, S. and Fierlinger, P. and Fudenberg, D. and Gornea, R. and Graham, K. and Gratta, G. and Hall, C. and Hansen, E. V. and Hoessl, J. and Hufschmidt, P. and Hughes, M. and Jamil, A. and Jewell, M. J. and Johnson, A. and Johnston, S. and Karelin, A. and Kaufman, L. J. and Koffas, T. and Kravitz, S. and Krücken, R. and Kuchenkov, A. and Kumar, K. S. and Lan, Y. and Leonard, D. S. and Li, G. S. and Li, S. and Licciardi, C. and Lin, Y. H. and MacLellan, R. and Michel, T. and Mong, B. and Moore, D. and Murray, K. and Nelson, R. and Njoya, O. and Odian, A. and Ostrovskiy, I. and Piepke, A. and Pocar, A. and Retière, F. and Rowson, P. C. and Russell, J. J. and Schmidt, S. and Schubert, A. and Sinclair, D. and Stekhanov, V. and Tarka, M. and Tolba, T. and Tsang, R. and Vogel, P. and Vuilleumier, J. -L. and Wagenpfeil, M. and Waite, A. and Walton, T. and Weber, M. and Wen, L. J. and Wichoski, U. and Wrede, G. and Yang, L. and Yen, Y. -R. and Zeldovich, O. Ya. and Zettlemoyer, J. and Ziegler, T.},
abstractNote = {Results from a search for neutrinoless double-beta decay (0νββ) of 136Xe are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detector has been improved to σ/E = 1.23 % , the electric field in the drift region has been raised by 50%, and a system to suppress radon in the volume between the cryostat and lead shielding has been implemented. In addition, analysis techniques that improve topological discrimination between 0νββ and background events have been developed. Incorporating these hardware and analysis improvements, the median 90% confidence level 0νββ half-life sensitivity after combining with the full data set acquired before the upgrade has increased twofold to 3.7 × 10 25 yr . Finally, no statistically significant evidence for 0νββ is observed, leading to a lower limit on the 0νββ half-life of 1.8 × 1025 yr at the 90% confidence level.},
doi = {10.1103/physrevlett.120.072701},
journal = {Physical Review Letters},
number = 7,
volume = 120,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
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DOI: 10.1103/physrevlett.120.072701

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Figures / Tables:

Figure 1 Figure 1: Comparison between SS events in Phase II data (open markers) and MC (lines) for calibrations using 60Co (green), 226Ra (blue), and 228Th (red) sources positioned near the cathode. The bottom shows the ratio be- tween data and MC. The inset compares the corresponding SS fraction, SS/(SS+MS), for themore » calibration data and MC.« less

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Works referenced in this record:

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.