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Title: Search for Neutrinoless Double-$β$ Decay with the Complete EXO-200 Dataset

Abstract

A search for neutrinoless double-$β$ decay ($0νββ$) in $$\mathrm{^{136}Xe}$$ is performed with the full EXO-200 dataset using a deep neural network to discriminate between $0νββ$ and background events. Relative to previous analyses, the signal detection efficiency has been raised from 80.8% to $$\mathrm{96.4 ± 3.0}$$%, and the energy resolution of the detector at the $Q$ value of $$\mathrm{^{136}Xe} 0νββ$$ has been improved from $$σ/E = \mathrm{1.23}$$% to $$\mathrm{1.15 ± 0.02}$$% with the upgraded detector. Accounting for the new data, the median 90% confidence level $0νββ$ half-life sensitivity for this analysis is$$\mathrm{5.0 × 10^{25} yr}$$ with a total $$^{136}Xe$$ exposure of 234.1 kg yr. No statistically significant evidence for $0νββ$ is observed, leading to a lower limit on the $0νββ$ half-life of $$\mathrm{3.5 × 10^{25} yr}$$ 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:
1570864
Alternate Identifier(s):
OSTI ID: 1574852
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 16; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Anton, G., Badhrees, I., Barbeau, P. S., Beck, D., Belov, V., Bhatta, T., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Darroch, L., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Dilling, J., Dolgolenko, A., Dolinski, M. J., Echevers, J., Fairbank, W., Fairbank, D., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gautam, P., Gornea, R., Gratta, G., Hall, C., Hansen, E. V., Hoessl, J., Hufschmidt, P., Hughes, M., Iverson, A., Jamil, A., Jessiman, C., Jewell, M. J., Johnson, A., Karelin, A., Kaufman, L. J., Koffas, T., Krücken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Larson, A., Lenardo, B. G., Leonard, D. S., Li, G. S., Li, S., Li, Z., Licciardi, C., Lin, Y. H., MacLellan, R., McElroy, T., Michel, T., Mong, B., Moore, D. C., Murray, K., Njoya, O., Nusair, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Retière, F., Robinson, A. L., Rowson, P. C., Ruddell, D., Runge, J., Schmidt, S., Sinclair, D., Soma, A. K., Stekhanov, V., Tarka, M., Todd, J., Tolba, T., Totev, T. I., Veenstra, B., Veeraraghavan, V., Vogel, P., Vuilleumier, J. -L., Wagenpfeil, M., Watkins, J., Weber, M., Wen, L. J., Wichoski, U., Wrede, G., Wu, S. X., Xia, Q., Yahne, D. R., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., and Ziegler, T. Search for Neutrinoless Double-$β$ Decay with the Complete EXO-200 Dataset. United States: N. p., 2019. Web. doi:10.1103/physrevlett.123.161802.
Anton, G., Badhrees, I., Barbeau, P. S., Beck, D., Belov, V., Bhatta, T., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Darroch, L., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Dilling, J., Dolgolenko, A., Dolinski, M. J., Echevers, J., Fairbank, W., Fairbank, D., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gautam, P., Gornea, R., Gratta, G., Hall, C., Hansen, E. V., Hoessl, J., Hufschmidt, P., Hughes, M., Iverson, A., Jamil, A., Jessiman, C., Jewell, M. J., Johnson, A., Karelin, A., Kaufman, L. J., Koffas, T., Krücken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Larson, A., Lenardo, B. G., Leonard, D. S., Li, G. S., Li, S., Li, Z., Licciardi, C., Lin, Y. H., MacLellan, R., McElroy, T., Michel, T., Mong, B., Moore, D. C., Murray, K., Njoya, O., Nusair, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Retière, F., Robinson, A. L., Rowson, P. C., Ruddell, D., Runge, J., Schmidt, S., Sinclair, D., Soma, A. K., Stekhanov, V., Tarka, M., Todd, J., Tolba, T., Totev, T. I., Veenstra, B., Veeraraghavan, V., Vogel, P., Vuilleumier, J. -L., Wagenpfeil, M., Watkins, J., Weber, M., Wen, L. J., Wichoski, U., Wrede, G., Wu, S. X., Xia, Q., Yahne, D. R., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., & Ziegler, T. Search for Neutrinoless Double-$β$ Decay with the Complete EXO-200 Dataset. United States. doi:10.1103/physrevlett.123.161802.
Anton, G., Badhrees, I., Barbeau, P. S., Beck, D., Belov, V., Bhatta, T., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Darroch, L., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Dilling, J., Dolgolenko, A., Dolinski, M. J., Echevers, J., Fairbank, W., Fairbank, D., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gautam, P., Gornea, R., Gratta, G., Hall, C., Hansen, E. V., Hoessl, J., Hufschmidt, P., Hughes, M., Iverson, A., Jamil, A., Jessiman, C., Jewell, M. J., Johnson, A., Karelin, A., Kaufman, L. J., Koffas, T., Krücken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Larson, A., Lenardo, B. G., Leonard, D. S., Li, G. S., Li, S., Li, Z., Licciardi, C., Lin, Y. H., MacLellan, R., McElroy, T., Michel, T., Mong, B., Moore, D. C., Murray, K., Njoya, O., Nusair, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Retière, F., Robinson, A. L., Rowson, P. C., Ruddell, D., Runge, J., Schmidt, S., Sinclair, D., Soma, A. K., Stekhanov, V., Tarka, M., Todd, J., Tolba, T., Totev, T. I., Veenstra, B., Veeraraghavan, V., Vogel, P., Vuilleumier, J. -L., Wagenpfeil, M., Watkins, J., Weber, M., Wen, L. J., Wichoski, U., Wrede, G., Wu, S. X., Xia, Q., Yahne, D. R., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., and Ziegler, T. Fri . "Search for Neutrinoless Double-$β$ Decay with the Complete EXO-200 Dataset". United States. doi:10.1103/physrevlett.123.161802.
@article{osti_1570864,
title = {Search for Neutrinoless Double-$β$ Decay with the Complete EXO-200 Dataset},
author = {Anton, G. and Badhrees, I. and Barbeau, P. S. and Beck, D. and Belov, V. and Bhatta, T. 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 Daniels, T. and Danilov, M. and Darroch, L. and Daugherty, S. J. and Davis, J. and Delaquis, S. and Der Mesrobian-Kabakian, A. and DeVoe, R. and Dilling, J. and Dolgolenko, A. and Dolinski, M. J. and Echevers, J. and Fairbank, W. and Fairbank, D. and Farine, J. and Feyzbakhsh, S. and Fierlinger, P. and Fudenberg, D. and Gautam, P. and Gornea, R. and Gratta, G. and Hall, C. and Hansen, E. V. and Hoessl, J. and Hufschmidt, P. and Hughes, M. and Iverson, A. and Jamil, A. and Jessiman, C. and Jewell, M. J. and Johnson, A. and Karelin, A. and Kaufman, L. J. and Koffas, T. and Krücken, R. and Kuchenkov, A. and Kumar, K. S. and Lan, Y. and Larson, A. and Lenardo, B. G. and Leonard, D. S. and Li, G. S. and Li, S. and Li, Z. and Licciardi, C. and Lin, Y. H. and MacLellan, R. and McElroy, T. and Michel, T. and Mong, B. and Moore, D. C. and Murray, K. and Njoya, O. and Nusair, O. and Odian, A. and Ostrovskiy, I. and Piepke, A. and Pocar, A. and Retière, F. and Robinson, A. L. and Rowson, P. C. and Ruddell, D. and Runge, J. and Schmidt, S. and Sinclair, D. and Soma, A. K. and Stekhanov, V. and Tarka, M. and Todd, J. and Tolba, T. and Totev, T. I. and Veenstra, B. and Veeraraghavan, V. and Vogel, P. and Vuilleumier, J. -L. and Wagenpfeil, M. and Watkins, J. and Weber, M. and Wen, L. J. and Wichoski, U. and Wrede, G. and Wu, S. X. and Xia, Q. and Yahne, D. R. and Yang, L. and Yen, Y. -R. and Zeldovich, O. Ya. and Ziegler, T.},
abstractNote = {A search for neutrinoless double-$β$ decay ($0νββ$) in $\mathrm{^{136}Xe}$ is performed with the full EXO-200 dataset using a deep neural network to discriminate between $0νββ$ and background events. Relative to previous analyses, the signal detection efficiency has been raised from 80.8% to $\mathrm{96.4 ± 3.0}$%, and the energy resolution of the detector at the $Q$ value of $\mathrm{^{136}Xe} 0νββ$ has been improved from $σ/E = \mathrm{1.23}$% to $\mathrm{1.15 ± 0.02}$% with the upgraded detector. Accounting for the new data, the median 90% confidence level $0νββ$ half-life sensitivity for this analysis is$\mathrm{5.0 × 10^{25} yr}$ with a total $^{136}Xe$ exposure of 234.1 kg yr. No statistically significant evidence for $0νββ$ is observed, leading to a lower limit on the $0νββ$ half-life of $\mathrm{3.5 × 10^{25} yr}$ at the 90% confidence level.},
doi = {10.1103/physrevlett.123.161802},
journal = {Physical Review Letters},
number = 16,
volume = 123,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
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DOI: 10.1103/physrevlett.123.161802

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