doi: 10.1103/PhysRevLett.120.132502.
Search for Neutrinoless Double-β Decay in ^{76}Ge with the Majorana Demonstrator
C E Aalseth
1
, N Abgrall
2
, E Aguayo
1
, S I Alvis
3
, M Amman
2
, I J Arnquist
1
, F T Avignone
4
5
, H O Back
6
7
, A S Barabash
8
, P S Barbeau
9
, C J Barton
10
, P J Barton
2
, F E Bertrand
5
, T Bode
11
, B Bos
12
, M Boswell
7
13
14
, A W Bradley
2
, R L Brodzinski
1
, V Brudanin
15
, M Busch
7
16
, M Buuck
3
, A S Caldwell
12
, T S Caldwell
7
14
, Y-D Chan
2
, C D Christofferson
12
, P-H Chu
13
, J I Collar
9
, D C Combs
6
7
, R J Cooper
5
, C Cuesta
3
, J A Detwiler
2
3
, P J Doe
3
, J A Dunmore
3
, Yu Efremenko
17
, H Ejiri
18
, S R Elliott
13
, J E Fast
1
, P Finnerty
7
14
, F M Fraenkle
7
14
, Z Fu
3
, B K Fujikawa
2
, E Fuller
1
, A Galindo-Uribarri
5
, V M Gehman
13
, T Gilliss
7
14
, G K Giovanetti
7
14
19
, J Goett
13
, M P Green
5
6
7
14
, J Gruszko
3
, I S Guinn
3
, V E Guiseppe
4
10
13
, A L Hallin
20
, C R Haufe
7
14
, L Hehn
2
, R Henning
7
14
, E W Hoppe
1
, T W Hossbach
1
, M A Howe
7
14
, B R Jasinski
10
, R A Johnson
3
, K J Keeter
21
, J D Kephart
1
, M F Kidd
7
13
22
, A Knecht
3
, S I Konovalov
8
, R T Kouzes
1
, B D LaFerriere
1
, J Leon
3
, K T Lesko
2
23
, L E Leviner
6
7
, J C Loach
2
24
, A M Lopez
17
, P N Luke
2
, J MacMullin
7
14
, S MacMullin
7
14
, M G Marino
3
, R D Martin
2
25
, R Massarczyk
13
, A B McDonald
25
, D-M Mei
10
13
, S J Meijer
7
14
, J H Merriman
1
, S Mertens
2
11
26
, H S Miley
1
, M L Miller
3
, J Myslik
2
, J L Orrell
1
, C O'Shaughnessy
7
14
, G Othman
7
14
, N R Overman
1
, G Perumpilly
10
, W Pettus
3
, D G Phillips
7
14
, A W P Poon
2
, K Pushkin
10
, D C Radford
5
, J Rager
7
14
, J H Reeves
1
, A L Reine
7
14
, K Rielage
13
, R G H Robertson
3
, M C Ronquest
13
, N W Ruof
3
, A G Schubert
3
, B Shanks
5
7
14
, M Shirchenko
15
, K J Snavely
7
14
, N Snyder
10
, D Steele
13
, A M Suriano
12
, D Tedeschi
4
, W Tornow
7
16
, J E Trimble
7
14
, R L Varner
5
, S Vasilyev
15
17
, K Vetter
2
27
, K Vorren
7
14
, B R White
5
13
, J F Wilkerson
5
7
14
, C Wiseman
4
, W Xu
7
10
13
14
, E Yakushev
15
, H Yaver
2
, A R Young
6
7
, C-H Yu
5
, V Yumatov
8
, I Zhitnikov
15
, B X Zhu
13
, S Zimmermann
2
; Majorana Collaboration
Affiliations
Affiliations
- 1 Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
- 2 Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
- 3 Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, Washington 98195, USA.
- 4 Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA.
- 5 Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
- 6 Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
- 7 Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
- 8 National Research Center "Kurchatov Institute" Institute for Theoretical and Experimental Physics, Moscow, 117218 Russia.
- 9 Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.
- 10 Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA.
- 11 Max-Planck-Institut für Physik, München, 80805 Germany.
- 12 South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA.
- 13 Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
- 14 Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
- 15 Joint Institute for Nuclear Research, Dubna, 141980 Russia.
- 16 Department of Physics, Duke University, Durham, North Carolina 27708, USA.
- 17 Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37916, USA.
- 18 Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
- 19 Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
- 20 Centre for Particle Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada.
- 21 Department of Physics, Black Hills State University, Spearfish, South Dakota 57799, USA.
- 22 Tennessee Tech University, Cookeville, Tennessee 38505, USA.
- 23 Department of Physics, University of California, Berkeley, California 94720, USA.
- 24 Shanghai Jiao Tong University, Shanghai 200240, China.
- 25 Department of Physics, Engineering Physics and Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada.
- 26 Physik Department and Excellence Cluster Universe, Technische Universität, München, 85748 Germany.
- 27 Department of Nuclear Engineering, University of California, Berkeley, California 94720, USA.
- PMID: 29694188
- DOI: 10.1103/PhysRevLett.120.132502
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Search for Neutrinoless Double-β Decay in ^{76}Ge with the Majorana Demonstrator
C E Aalseth et al.
Phys Rev Lett.
.
Free article
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doi: 10.1103/PhysRevLett.120.132502.
Authors
C E Aalseth
1
, N Abgrall
2
, E Aguayo
1
, S I Alvis
3
, M Amman
2
, I J Arnquist
1
, F T Avignone
4
5
, H O Back
6
7
, A S Barabash
8
, P S Barbeau
9
, C J Barton
10
, P J Barton
2
, F E Bertrand
5
, T Bode
11
, B Bos
12
, M Boswell
7
13
14
, A W Bradley
2
, R L Brodzinski
1
, V Brudanin
15
, M Busch
7
16
, M Buuck
3
, A S Caldwell
12
, T S Caldwell
7
14
, Y-D Chan
2
, C D Christofferson
12
, P-H Chu
13
, J I Collar
9
, D C Combs
6
7
, R J Cooper
5
, C Cuesta
3
, J A Detwiler
2
3
, P J Doe
3
, J A Dunmore
3
, Yu Efremenko
17
, H Ejiri
18
, S R Elliott
13
, J E Fast
1
, P Finnerty
7
14
, F M Fraenkle
7
14
, Z Fu
3
, B K Fujikawa
2
, E Fuller
1
, A Galindo-Uribarri
5
, V M Gehman
13
, T Gilliss
7
14
, G K Giovanetti
7
14
19
, J Goett
13
, M P Green
5
6
7
14
, J Gruszko
3
, I S Guinn
3
, V E Guiseppe
4
10
13
, A L Hallin
20
, C R Haufe
7
14
, L Hehn
2
, R Henning
7
14
, E W Hoppe
1
, T W Hossbach
1
, M A Howe
7
14
, B R Jasinski
10
, R A Johnson
3
, K J Keeter
21
, J D Kephart
1
, M F Kidd
7
13
22
, A Knecht
3
, S I Konovalov
8
, R T Kouzes
1
, B D LaFerriere
1
, J Leon
3
, K T Lesko
2
23
, L E Leviner
6
7
, J C Loach
2
24
, A M Lopez
17
, P N Luke
2
, J MacMullin
7
14
, S MacMullin
7
14
, M G Marino
3
, R D Martin
2
25
, R Massarczyk
13
, A B McDonald
25
, D-M Mei
10
13
, S J Meijer
7
14
, J H Merriman
1
, S Mertens
2
11
26
, H S Miley
1
, M L Miller
3
, J Myslik
2
, J L Orrell
1
, C O'Shaughnessy
7
14
, G Othman
7
14
, N R Overman
1
, G Perumpilly
10
, W Pettus
3
, D G Phillips
7
14
, A W P Poon
2
, K Pushkin
10
, D C Radford
5
, J Rager
7
14
, J H Reeves
1
, A L Reine
7
14
, K Rielage
13
, R G H Robertson
3
, M C Ronquest
13
, N W Ruof
3
, A G Schubert
3
, B Shanks
5
7
14
, M Shirchenko
15
, K J Snavely
7
14
, N Snyder
10
, D Steele
13
, A M Suriano
12
, D Tedeschi
4
, W Tornow
7
16
, J E Trimble
7
14
, R L Varner
5
, S Vasilyev
15
17
, K Vetter
2
27
, K Vorren
7
14
, B R White
5
13
, J F Wilkerson
5
7
14
, C Wiseman
4
, W Xu
7
10
13
14
, E Yakushev
15
, H Yaver
2
, A R Young
6
7
, C-H Yu
5
, V Yumatov
8
, I Zhitnikov
15
, B X Zhu
13
, S Zimmermann
2
; Majorana Collaboration
Affiliations
- 1 Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
- 2 Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
- 3 Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, Washington 98195, USA.
- 4 Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA.
- 5 Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
- 6 Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
- 7 Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
- 8 National Research Center "Kurchatov Institute" Institute for Theoretical and Experimental Physics, Moscow, 117218 Russia.
- 9 Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.
- 10 Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA.
- 11 Max-Planck-Institut für Physik, München, 80805 Germany.
- 12 South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA.
- 13 Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
- 14 Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
- 15 Joint Institute for Nuclear Research, Dubna, 141980 Russia.
- 16 Department of Physics, Duke University, Durham, North Carolina 27708, USA.
- 17 Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37916, USA.
- 18 Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
- 19 Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
- 20 Centre for Particle Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada.
- 21 Department of Physics, Black Hills State University, Spearfish, South Dakota 57799, USA.
- 22 Tennessee Tech University, Cookeville, Tennessee 38505, USA.
- 23 Department of Physics, University of California, Berkeley, California 94720, USA.
- 24 Shanghai Jiao Tong University, Shanghai 200240, China.
- 25 Department of Physics, Engineering Physics and Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada.
- 26 Physik Department and Excellence Cluster Universe, Technische Universität, München, 85748 Germany.
- 27 Department of Nuclear Engineering, University of California, Berkeley, California 94720, USA.
- PMID: 29694188
- DOI: 10.1103/PhysRevLett.120.132502
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Abstract
The Majorana Collaboration is operating an array of high purity Ge detectors to search for neutrinoless double-β decay in ^{76}Ge. The Majorana Demonstrator comprises 44.1 kg of Ge detectors (29.7 kg enriched in ^{76}Ge) split between two modules contained in a low background shield at the Sanford Underground Research Facility in Lead, South Dakota. Here we present results from data taken during construction, commissioning, and the start of full operations. We achieve unprecedented energy resolution of 2.5 keV FWHM at Q_{ββ} and a very low background with no observed candidate events in 9.95 kg yr of enriched Ge exposure, resulting in a lower limit on the half-life of 1.9×10^{25} yr (90% C.L.). This result constrains the effective Majorana neutrino mass to below 240-520 meV, depending on the matrix elements used. In our experimental configuration with the lowest background, the background is 4.0_{-2.5}^{+3.1} counts/(FWHM t yr).
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