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

doi:10.1103/PhysRevLett.123.161802

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:

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. more »

Publication Date:: 2019-10-18

Research Org.:: SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)

Sponsoring Org.:: USDOE

Contributing Org.:: EXO-200 Collaboration

OSTI Identifier:: 1570864

Alternate Identifier(s):: OSTI ID: 1574852; OSTI ID: 1656893

Grant/Contract Number:: AC02-76SF00515; SC0017970

Resource Type:: Published Article

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Name: Physical Review Letters 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., Ziegler, T., and EXO-200 Collaboration. Search for Neutrinoless Double- β Decay with the Complete EXO-200 Dataset.  United States: N. p., 2019. 
        Web.  doi:10.1103/PhysRevLett.123.161802.

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                    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., & EXO-200 Collaboration. Search for Neutrinoless Double- β Decay with the Complete EXO-200 Dataset.  United States.  doi:10.1103/PhysRevLett.123.161802.

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                    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., and EXO-200 Collaboration. Fri .  
        "Search for Neutrinoless Double- β Decay with the Complete EXO-200 Dataset".  United States.  doi:10.1103/PhysRevLett.123.161802.

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@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. and EXO-200 Collaboration},

  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}

}

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

Abstract

Citation Formats

Disassembling the nuclear matrix elements of the neutrinoless ββ decay journal, March 2009

Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector journal, February 2018

Investigation of radioactivity-induced backgrounds in EXO-200 journal, July 2015

Improved measurement of the 2 ν β β half-life of 136 Xe with the EXO-200 detector journal, January 2014

Neutrino-Less Double beta Decay and Particle Physics journal, September 2011

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On Transition Probabilities in Double Beta-Disintegration journal, December 1939

Measurement of the drift velocity and transverse diffusion of electrons in liquid xenon with the EXO-200 detector journal, February 2017

Shape and Pairing Fluctuation Effects on Neutrinoless Double Beta Decay Nuclear Matrix Elements journal, September 2013

0 ν β β and 2 ν β β nuclear matrix elements in the interacting boson model with isospin restoration journal, March 2015

Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double- β decay journal, June 2018

Status and future of nuclear matrix elements for neutrinoless double-beta decay: a review journal, March 2017

The EXO-200 detector, part I: detector design and construction journal, May 2012

Neutrinoless Double Beta Decay: 2015 Review journal, January 2016

First Results from CUORE: A Search for Lepton Number Violation via 0 ν β β Decay of Te 130 journal, March 2018

Large-scale calculations of the double- β decay of 76 Ge , 130 Te , 136 Xe , and 150 Nd in the deformed self-consistent Skyrme quasiparticle random-phase approximation journal, June 2013

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Search for Neutrinoless Double- β Decay in Ge 76 with the Majorana Demonstrator journal, March 2018

Geant4 developments and applications journal, February 2006

Cosmogenic backgrounds to 0νββ in EXO-200 journal, April 2016

Half-lives of some short-lived mass-separated gaseous fission products and their daughters journal, March 1969

Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen journal, August 2016

Deep neural networks for energy and position reconstruction in EXO-200 journal, August 2018

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Phase-space factors for double- β decay journal, March 2012

Mass and Double-Beta-Decay Q Value of Xe 136 journal, February 2007

Correlated fluctuations between luminescence and ionization in liquid xenon journal, August 2003

An optimal energy estimator to reduce correlated noise for the EXO-200 light readout journal, July 2016

Chiral two-body currents and neutrinoless double- β decay in the quasiparticle random-phase approximation journal, June 2014

Theory of neutrinoless double-beta decay journal, September 2012

Renormalized approach to neutrinoless double- β decay journal, November 2019

Exposure-background duality in the searches of neutrinoless double beta decay journal, January 2020

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

Disassembling the nuclear matrix elements of the neutrinoless ββ decay
journal, March 2009

Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector
journal, February 2018

Investigation of radioactivity-induced backgrounds in EXO-200
journal, July 2015

Improved measurement of the $2 ν β β$ half-life of $^{136}$ Xe with the EXO-200 detector
journal, January 2014

Neutrino-Less Double beta Decay and Particle Physics
journal, September 2011

Characterization of large area APDs for the EXO-200 detector
journal, September 2009

On Transition Probabilities in Double Beta-Disintegration
journal, December 1939

Measurement of the drift velocity and transverse diffusion of electrons in liquid xenon with the EXO-200 detector
journal, February 2017

Shape and Pairing Fluctuation Effects on Neutrinoless Double Beta Decay Nuclear Matrix Elements
journal, September 2013

$0 ν β β$ and $2 ν β β$ nuclear matrix elements in the interacting boson model with isospin restoration
journal, March 2015

Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double- $β$ decay
journal, June 2018

Status and future of nuclear matrix elements for neutrinoless double-beta decay: a review
journal, March 2017

The EXO-200 detector, part I: detector design and construction
journal, May 2012

Neutrinoless Double Beta Decay: 2015 Review
journal, January 2016

First Results from CUORE: A Search for Lepton Number Violation via $0 ν β β$ Decay of ${}^{130}{Te}$
journal, March 2018

Large-scale calculations of the double- $β$ decay of $^{76} Ge,^{130} Te,^{136} Xe$ , and $^{150} Nd$ in the deformed self-consistent Skyrme quasiparticle random-phase approximation
journal, June 2013

Review of Particle Physics
journal, August 2018

Improved Limit on Neutrinoless Double- $β$ Decay of ${}^{76}{Ge}$ from GERDA Phase II
journal, March 2018

Search for Neutrinoless Double- $β$ Decay in ${}^{76}{Ge}$ with the Majorana Demonstrator
journal, March 2018

Geant4 developments and applications
journal, February 2006

Cosmogenic backgrounds to 0νββ in EXO-200
journal, April 2016

Half-lives of some short-lived mass-separated gaseous fission products and their daughters
journal, March 1969

Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen
journal, August 2016

Deep neural networks for energy and position reconstruction in EXO-200
journal, August 2018

The Large-Sample Distribution of the Likelihood Ratio for Testing Composite Hypotheses
journal, March 1938

Phase-space factors for double- $β$ decay
journal, March 2012

Mass and Double-Beta-Decay $Q$ Value of ${}^{136}{Xe}$
journal, February 2007

Correlated fluctuations between luminescence and ionization in liquid xenon
journal, August 2003

An optimal energy estimator to reduce correlated noise for the EXO-200 light readout
journal, July 2016

Chiral two-body currents and neutrinoless double- $β$ decay in the quasiparticle random-phase approximation
journal, June 2014

Theory of neutrinoless double-beta decay
journal, September 2012

Renormalized approach to neutrinoless double- β decay
journal, November 2019

Exposure-background duality in the searches of neutrinoless double beta decay
journal, January 2020