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Search for Neutrinoless Double-β Decay in ^{76}Ge with the Majorana Demonstrator.

Publication ,  Journal Article
Aalseth, CE; Abgrall, N; Aguayo, E; Alvis, SI; Amman, M; Arnquist, IJ; Avignone, FT; Back, HO; Barabash, AS; Barbeau, PS; Barton, CJ; Bode, T ...
Published in: Physical review letters
March 2018

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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Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

March 2018

Volume

120

Issue

13

Start / End Page

132502

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

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Aalseth, C. E., Abgrall, N., Aguayo, E., Alvis, S. I., Amman, M., Arnquist, I. J., … Majorana Collaboration, . (2018). Search for Neutrinoless Double-β Decay in ^{76}Ge with the Majorana Demonstrator. Physical Review Letters, 120(13), 132502. https://doi.org/10.1103/physrevlett.120.132502
Aalseth, C. E., N. Abgrall, E. Aguayo, S. I. Alvis, M. Amman, I. J. Arnquist, F. T. Avignone, et al. “Search for Neutrinoless Double-β Decay in ^{76}Ge with the Majorana Demonstrator.Physical Review Letters 120, no. 13 (March 2018): 132502. https://doi.org/10.1103/physrevlett.120.132502.
Aalseth CE, Abgrall N, Aguayo E, Alvis SI, Amman M, Arnquist IJ, et al. Search for Neutrinoless Double-β Decay in ^{76}Ge with the Majorana Demonstrator. Physical review letters. 2018 Mar;120(13):132502.
Aalseth, C. E., et al. “Search for Neutrinoless Double-β Decay in ^{76}Ge with the Majorana Demonstrator.Physical Review Letters, vol. 120, no. 13, Mar. 2018, p. 132502. Epmc, doi:10.1103/physrevlett.120.132502.
Aalseth CE, Abgrall N, Aguayo E, Alvis SI, Amman M, Arnquist IJ, Avignone FT, Back HO, Barabash AS, Barbeau PS, Barton CJ, Barton PJ, Bertrand FE, Bode T, Bos B, Boswell M, Bradley AW, Brodzinski RL, Brudanin V, Busch M, Buuck M, Caldwell AS, Caldwell TS, Chan Y-D, Christofferson CD, Chu P-H, Collar JI, Combs DC, Cooper RJ, Cuesta C, Detwiler JA, Doe PJ, Dunmore JA, Efremenko Y, Ejiri H, Elliott SR, Fast JE, Finnerty P, Fraenkle FM, Fu Z, Fujikawa BK, Fuller E, Galindo-Uribarri A, Gehman VM, Gilliss T, Giovanetti GK, Goett J, Green MP, Gruszko J, Guinn IS, Guiseppe VE, Hallin AL, Haufe CR, Hehn L, Henning R, Hoppe EW, Hossbach TW, Howe MA, Jasinski BR, Johnson RA, Keeter KJ, Kephart JD, Kidd MF, Knecht A, Konovalov SI, Kouzes RT, LaFerriere BD, Leon J, Lesko KT, Leviner LE, Loach JC, Lopez AM, Luke PN, MacMullin J, MacMullin S, Marino MG, Martin RD, Massarczyk R, McDonald AB, Mei D-M, Meijer SJ, Merriman JH, Mertens S, Miley HS, Miller ML, Myslik J, Orrell JL, O’Shaughnessy C, Othman G, Overman NR, Perumpilly G, Pettus W, Phillips DG, Poon AWP, Pushkin K, Radford DC, Rager J, Reeves JH, Reine AL, Rielage K, Robertson RGH, Ronquest MC, Ruof NW, Schubert AG, Shanks B, Shirchenko M, Snavely KJ, Snyder N, Steele D, Suriano AM, Tedeschi D, Tornow W, Trimble JE, Varner RL, Vasilyev S, Vetter K, Vorren K, White BR, Wilkerson JF, Wiseman C, Xu W, Yakushev E, Yaver H, Young AR, Yu C-H, Yumatov V, Zhitnikov I, Zhu BX, Zimmermann S, Majorana Collaboration. Search for Neutrinoless Double-β Decay in ^{76}Ge with the Majorana Demonstrator. Physical review letters. 2018 Mar;120(13):132502.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

March 2018

Volume

120

Issue

13

Start / End Page

132502

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences