Search for neutrinoless double-β decay in Ge76 with 26 kg yr of exposure from the Majorana Demonstrator
The Majorana Collaboration is operating an array of high-purity Ge detectors to search for the neutrinoless double-β decay of Ge76. The Majorana Demonstrator consists of 44.1 kg of Ge detectors (29.7 kg enriched to 88% in Ge76) split between two modules constructed from ultraclean materials. Both mo...
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| creator | Alvis, S. I. Arnquist, I. J. Avignone, F. T. Barabash, A. S. Barton, C. J. Basu, V. Bertrand, F. E. Bos, B. Busch, M. Buuck, M. Caldwell, T. S. Chan, Y-D. Christofferson, C. D. Chu, P. -H. Clark, M. Cuesta, C. Detwiler, J. A. Efremenko, Yu Ejiri, H. Elliott, S. R. Gilliss, T. Giovanetti, G. K. Green, M. P. Gruszko, J. Guinn, I. S. Guiseppe, V. E. Haufe, C. R. Hegedus, R. J. Hehn, L. Henning, R. Hervas Aguilar, D. Hoppe, E. W. Howe, M. A. Kidd, M. F. Konovalov, S. I. Kouzes, R. T. Lopez, A. M. Martin, R. D. Massarczyk, R. Meijer, S. J. Mertens, S. Myslik, J. Othman, G. Pettus, W. Piliounis, A. Poon, A. W. P. Radford, D. C. Rager, J. Reine, A. L. Rielage, K. Ruof, N. W. Shanks, B. Shirchenko, M. Tedeschi, D. Varner, R. L. Vasilyev, S. White, B. R. Wilkerson, J. F. Wiseman, C. Xu, W. Yakushev, E. Yu, C. -H. Yumatov, V. Zhitnikov, I. Zhu, B. X. |
| description | The Majorana Collaboration is operating an array of high-purity Ge detectors to search for the neutrinoless double-β decay of Ge76. The Majorana Demonstrator consists of 44.1 kg of Ge detectors (29.7 kg enriched to 88% in Ge76) split between two modules constructed from ultraclean materials. Both modules are contained in a low-background shield at the Sanford Underground Research Facility in Lead, South Dakota. We present updated results on the search for neutrinoless double-β decay in Ge76 with 26.0±0.5 kg yr of enriched exposure. With the Demonstrator's energy resolution of 2.53 keV FWHM at Qββ, which is the best among all neutrinoless double-β decay experiments, we observe one event in the region of interest with 0.65 events expected from the estimated background, resulting in a lower limit on the Ge76 neutrinoless double-β decay half-life of 2.7×1025 yr [90% confidence level (CL)] with a median sensitivity of 4.8×1025 yr (90% CL). Depending on the matrix elements used, a 90% CL upper limit on the effective Majorana neutrino mass in the range of 200–433 meV is obtained. The measured background in the configurations with full shielding and optimized grounding is 11.9±2.0 counts/(FWHM t yr). |
| format | Article |
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E. ; Bos, B. ; Busch, M. ; Buuck, M. ; Caldwell, T. S. ; Chan, Y-D. ; Christofferson, C. D. ; Chu, P. -H. ; Clark, M. ; Cuesta, C. ; Detwiler, J. A. ; Efremenko, Yu ; Ejiri, H. ; Elliott, S. R. ; Gilliss, T. ; Giovanetti, G. K. ; Green, M. P. ; Gruszko, J. ; Guinn, I. S. ; Guiseppe, V. E. ; Haufe, C. R. ; Hegedus, R. J. ; Hehn, L. ; Henning, R. ; Hervas Aguilar, D. ; Hoppe, E. W. ; Howe, M. A. ; Kidd, M. F. ; Konovalov, S. I. ; Kouzes, R. T. ; Lopez, A. M. ; Martin, R. D. ; Massarczyk, R. ; Meijer, S. J. ; Mertens, S. ; Myslik, J. ; Othman, G. ; Pettus, W. ; Piliounis, A. ; Poon, A. W. P. ; Radford, D. C. ; Rager, J. ; Reine, A. L. ; Rielage, K. ; Ruof, N. W. ; Shanks, B. ; Shirchenko, M. ; Tedeschi, D. ; Varner, R. L. ; Vasilyev, S. ; White, B. R. ; Wilkerson, J. F. ; Wiseman, C. ; Xu, W. ; Yakushev, E. ; Yu, C. -H. ; Yumatov, V. ; Zhitnikov, I. ; Zhu, B. X.</creator><creatorcontrib>Alvis, S. I. ; Arnquist, I. J. ; Avignone, F. T. ; Barabash, A. S. ; Barton, C. J. ; Basu, V. ; Bertrand, F. E. ; Bos, B. ; Busch, M. ; Buuck, M. ; Caldwell, T. S. ; Chan, Y-D. ; Christofferson, C. D. ; Chu, P. -H. ; Clark, M. ; Cuesta, C. ; Detwiler, J. A. ; Efremenko, Yu ; Ejiri, H. ; Elliott, S. R. ; Gilliss, T. ; Giovanetti, G. K. ; Green, M. P. ; Gruszko, J. ; Guinn, I. S. ; Guiseppe, V. E. ; Haufe, C. R. ; Hegedus, R. J. ; Hehn, L. ; Henning, R. ; Hervas Aguilar, D. ; Hoppe, E. W. ; Howe, M. A. ; Kidd, M. F. ; Konovalov, S. I. ; Kouzes, R. T. ; Lopez, A. M. ; Martin, R. D. ; Massarczyk, R. ; Meijer, S. J. ; Mertens, S. ; Myslik, J. ; Othman, G. ; Pettus, W. ; Piliounis, A. ; Poon, A. W. P. ; Radford, D. C. ; Rager, J. ; Reine, A. L. ; Rielage, K. ; Ruof, N. W. ; Shanks, B. ; Shirchenko, M. ; Tedeschi, D. ; Varner, R. L. ; Vasilyev, S. ; White, B. R. ; Wilkerson, J. F. ; Wiseman, C. ; Xu, W. ; Yakushev, E. ; Yu, C. -H. ; Yumatov, V. ; Zhitnikov, I. ; Zhu, B. X. ; Los Alamos National Lab. (LANL), Los Alamos, NM (United States) ; Univ. of Tennessee, Knoxville, TN (United States) ; Univ. of North Carolina, Chapel Hill, NC (United States) ; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)</creatorcontrib><description>The Majorana Collaboration is operating an array of high-purity Ge detectors to search for the neutrinoless double-β decay of Ge76. The Majorana Demonstrator consists of 44.1 kg of Ge detectors (29.7 kg enriched to 88% in Ge76) split between two modules constructed from ultraclean materials. Both modules are contained in a low-background shield at the Sanford Underground Research Facility in Lead, South Dakota. We present updated results on the search for neutrinoless double-β decay in Ge76 with 26.0±0.5 kg yr of enriched exposure. With the Demonstrator's energy resolution of 2.53 keV FWHM at Qββ, which is the best among all neutrinoless double-β decay experiments, we observe one event in the region of interest with 0.65 events expected from the estimated background, resulting in a lower limit on the Ge76 neutrinoless double-β decay half-life of 2.7×1025 yr [90% confidence level (CL)] with a median sensitivity of 4.8×1025 yr (90% CL). Depending on the matrix elements used, a 90% CL upper limit on the effective Majorana neutrino mass in the range of 200–433 meV is obtained. The measured background in the configurations with full shielding and optimized grounding is 11.9±2.0 counts/(FWHM t yr).</description><identifier>ISSN: 2469-9985</identifier><identifier>EISSN: 2469-9993</identifier><language>eng</language><publisher>United States: American Physical Society (APS)</publisher><subject>A ≤ 89 ; Baryon & lepton number symmetries ; Double beta decay ; Neutrinoless double beta decay ; NUCLEAR PHYSICS AND RADIATION PHYSICS ; Nuclear structure & decays ; Spectrometers & spectroscopic techniques</subject><ispartof>Physical review. 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(LBNL), Berkeley, CA (United States)</creatorcontrib><title>Search for neutrinoless double-β decay in Ge76 with 26 kg yr of exposure from the Majorana Demonstrator</title><title>Physical review. C</title><description>The Majorana Collaboration is operating an array of high-purity Ge detectors to search for the neutrinoless double-β decay of Ge76. The Majorana Demonstrator consists of 44.1 kg of Ge detectors (29.7 kg enriched to 88% in Ge76) split between two modules constructed from ultraclean materials. Both modules are contained in a low-background shield at the Sanford Underground Research Facility in Lead, South Dakota. We present updated results on the search for neutrinoless double-β decay in Ge76 with 26.0±0.5 kg yr of enriched exposure. With the Demonstrator's energy resolution of 2.53 keV FWHM at Qββ, which is the best among all neutrinoless double-β decay experiments, we observe one event in the region of interest with 0.65 events expected from the estimated background, resulting in a lower limit on the Ge76 neutrinoless double-β decay half-life of 2.7×1025 yr [90% confidence level (CL)] with a median sensitivity of 4.8×1025 yr (90% CL). Depending on the matrix elements used, a 90% CL upper limit on the effective Majorana neutrino mass in the range of 200–433 meV is obtained. The measured background in the configurations with full shielding and optimized grounding is 11.9±2.0 counts/(FWHM t yr).</description><subject>A ≤ 89</subject><subject>Baryon & lepton number symmetries</subject><subject>Double beta decay</subject><subject>Neutrinoless double beta decay</subject><subject>NUCLEAR PHYSICS AND RADIATION PHYSICS</subject><subject>Nuclear structure & decays</subject><subject>Spectrometers & spectroscopic techniques</subject><issn>2469-9985</issn><issn>2469-9993</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqNyjFuAjEQQFELBQkUuMOIfiUvC15ck0CaVNAjY2ZZw-JBM14Bt8kZcoQcIGeiQdRU_xW_o_rjibGZtbZ4e3o27amhyEFrnRtty1z3VVihY19DRQwR28QhUoMisKN222D2_ws79O4GIcISSwOXkGoYGzju_35uDFQBXs8kLSNUTCdINcK3OxC76OADTxQlsUvEA9WtXCM4fPRdjRaf6_lXRpLCRnxI6GtPMaJPm3xqJrosipemOzKVSrE</recordid><startdate>20190823</startdate><enddate>20190823</enddate><creator>Alvis, S. 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L.</creatorcontrib><creatorcontrib>Rielage, K.</creatorcontrib><creatorcontrib>Ruof, N. W.</creatorcontrib><creatorcontrib>Shanks, B.</creatorcontrib><creatorcontrib>Shirchenko, M.</creatorcontrib><creatorcontrib>Tedeschi, D.</creatorcontrib><creatorcontrib>Varner, R. L.</creatorcontrib><creatorcontrib>Vasilyev, S.</creatorcontrib><creatorcontrib>White, B. R.</creatorcontrib><creatorcontrib>Wilkerson, J. F.</creatorcontrib><creatorcontrib>Wiseman, C.</creatorcontrib><creatorcontrib>Xu, W.</creatorcontrib><creatorcontrib>Yakushev, E.</creatorcontrib><creatorcontrib>Yu, C. -H.</creatorcontrib><creatorcontrib>Yumatov, V.</creatorcontrib><creatorcontrib>Zhitnikov, I.</creatorcontrib><creatorcontrib>Zhu, B. X.</creatorcontrib><creatorcontrib>Los Alamos National Lab. (LANL), Los Alamos, NM (United States)</creatorcontrib><creatorcontrib>Univ. of Tennessee, Knoxville, TN (United States)</creatorcontrib><creatorcontrib>Univ. of North Carolina, Chapel Hill, NC (United States)</creatorcontrib><creatorcontrib>Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)</creatorcontrib><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Physical review. C</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Alvis, S. I.</au><au>Arnquist, I. J.</au><au>Avignone, F. T.</au><au>Barabash, A. S.</au><au>Barton, C. J.</au><au>Basu, V.</au><au>Bertrand, F. E.</au><au>Bos, B.</au><au>Busch, M.</au><au>Buuck, M.</au><au>Caldwell, T. S.</au><au>Chan, Y-D.</au><au>Christofferson, C. D.</au><au>Chu, P. -H.</au><au>Clark, M.</au><au>Cuesta, C.</au><au>Detwiler, J. A.</au><au>Efremenko, Yu</au><au>Ejiri, H.</au><au>Elliott, S. R.</au><au>Gilliss, T.</au><au>Giovanetti, G. K.</au><au>Green, M. P.</au><au>Gruszko, J.</au><au>Guinn, I. S.</au><au>Guiseppe, V. E.</au><au>Haufe, C. R.</au><au>Hegedus, R. J.</au><au>Hehn, L.</au><au>Henning, R.</au><au>Hervas Aguilar, D.</au><au>Hoppe, E. W.</au><au>Howe, M. A.</au><au>Kidd, M. F.</au><au>Konovalov, S. I.</au><au>Kouzes, R. T.</au><au>Lopez, A. M.</au><au>Martin, R. D.</au><au>Massarczyk, R.</au><au>Meijer, S. J.</au><au>Mertens, S.</au><au>Myslik, J.</au><au>Othman, G.</au><au>Pettus, W.</au><au>Piliounis, A.</au><au>Poon, A. W. P.</au><au>Radford, D. C.</au><au>Rager, J.</au><au>Reine, A. L.</au><au>Rielage, K.</au><au>Ruof, N. W.</au><au>Shanks, B.</au><au>Shirchenko, M.</au><au>Tedeschi, D.</au><au>Varner, R. L.</au><au>Vasilyev, S.</au><au>White, B. R.</au><au>Wilkerson, J. F.</au><au>Wiseman, C.</au><au>Xu, W.</au><au>Yakushev, E.</au><au>Yu, C. -H.</au><au>Yumatov, V.</au><au>Zhitnikov, I.</au><au>Zhu, B. X.</au><aucorp>Los Alamos National Lab. (LANL), Los Alamos, NM (United States)</aucorp><aucorp>Univ. of Tennessee, Knoxville, TN (United States)</aucorp><aucorp>Univ. of North Carolina, Chapel Hill, NC (United States)</aucorp><aucorp>Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Search for neutrinoless double-β decay in Ge76 with 26 kg yr of exposure from the Majorana Demonstrator</atitle><jtitle>Physical review. C</jtitle><date>2019-08-23</date><risdate>2019</risdate><volume>100</volume><issue>2</issue><issn>2469-9985</issn><eissn>2469-9993</eissn><abstract>The Majorana Collaboration is operating an array of high-purity Ge detectors to search for the neutrinoless double-β decay of Ge76. The Majorana Demonstrator consists of 44.1 kg of Ge detectors (29.7 kg enriched to 88% in Ge76) split between two modules constructed from ultraclean materials. Both modules are contained in a low-background shield at the Sanford Underground Research Facility in Lead, South Dakota. We present updated results on the search for neutrinoless double-β decay in Ge76 with 26.0±0.5 kg yr of enriched exposure. With the Demonstrator's energy resolution of 2.53 keV FWHM at Qββ, which is the best among all neutrinoless double-β decay experiments, we observe one event in the region of interest with 0.65 events expected from the estimated background, resulting in a lower limit on the Ge76 neutrinoless double-β decay half-life of 2.7×1025 yr [90% confidence level (CL)] with a median sensitivity of 4.8×1025 yr (90% CL). Depending on the matrix elements used, a 90% CL upper limit on the effective Majorana neutrino mass in the range of 200–433 meV is obtained. The measured background in the configurations with full shielding and optimized grounding is 11.9±2.0 counts/(FWHM t yr).</abstract><cop>United States</cop><pub>American Physical Society (APS)</pub><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 2469-9985 |
| ispartof | Physical review. C, 2019-08, Vol.100 (2) |
| issn | 2469-9985 2469-9993 |
| language | eng |
| recordid | cdi_osti_scitechconnect_1564073 |
| source | American Physical Society Journals |
| subjects | A ≤ 89 Baryon & lepton number symmetries Double beta decay Neutrinoless double beta decay NUCLEAR PHYSICS AND RADIATION PHYSICS Nuclear structure & decays Spectrometers & spectroscopic techniques |
| title | Search for neutrinoless double-β decay in Ge76 with 26 kg yr of exposure from the Majorana Demonstrator |
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