Search for Zero-Neutrino Double Beta Decay in 76Ge with the Majorana Demonstrator

Aalseth, C. E.; Abgrall, N.; Aguayo, E.; Alvis, S. I.; Amman, M.; Arnquist, I. J.; Avignone, F. T.; Back, H. O.; Barabash, A. S.; Barbeau, P. S.; Barton, C. J.; Barton, P. J.; Bertrand, F. E.; Bode, T.; Bos, B.; Boswell, M.; Brodzinski, R. L.; Bradley, A. W.; Brudanin, V.; Busch, M.; Buuck, M.; Caldwell, A. S.; Caldwell, T. S.; Chan, Y-D.; Christofferson, C. D.; Chu, P. -H.; Collar, J. I.; Combs, D. C.; Cooper, R. J.; Cuesta, C.; Detwiler, J. A.; Doe, P. J.; Dunmore, J. A.; Efremenko, Yu.; Ejiri, H.; Elliott, S. R.; Fast, J. E.; Finnerty, P.; Fraenkle, F. M.; Fu, Z.; Fujikawa, B. K.; Fuller, E.; Galindo-Uribarri, A.; Gehman, V. M.; Gilliss, T.; Giovanetti, G. K.; Goett, J.; Green, M. P.; Gruszko, J.; Guinn, I. S.; Guiseppe, V. E.; Hallin, A. L.; Haufe, C. R.; Hehn, L.; Henning, R.; Hoppe, E. W.; Hossbach, T. W.; Howe, M. A.; Jasinski, B. R.; Johnson, R. A.; Keeter, K. J.; Kephart, J. D.; Kidd, M. F.; Knecht, A.; Konovalov, S. I.; Kouzes, R. T.; Lesko, K. T.; LaFerriere, B. D.; Leon, J.; Leviner, L. E.; Loach, J. C.; Lopez, A. M.; Luke, P. N.; MacMullin, J.; MacMullin, S.; Marino, M. G.; Martin, R. D.; Massarczyk, R.; McDonald, A. B.; Mei, D. -M.; Meijer, S. J.; Merriman, J. H.; Mertens, S.; Miley, H. S.; Miller, M. L.; Myslik, J.; Orrell, J. L.; O'Shaughnessy, C.; Othman, G.; Overman, N. R.; Pettus, W.; Phillips, D. G.; Poon, A. W. P.; Perumpilly, G.; Pushkin, K.; Radford, D. C.; Rager, J.; Reeves, J. H.; Reine, A. L.; Rielage, K.; Robertson, R. G. H.; Ronquest, M. C.; Ruof, N. W.; Schubert, A. G.; Shanks, B.; Shirchenko, M.; Snavely, K. J.; Snyder, N.; Steele, D.; Suriano, A. M.; Tedeschi, D.; Tornow, W.; Trimble, J. E.; Varner, R. L.; Vasilyev, S.; Vetter, K.; Vorren, K.; White, B. R.; Wilkerson, J. F.; Wiseman, C.; Xu, W.; Yakushev, E.; Yaver, H.; Young, A. R.; Yu, C. -H.; Yumatov, V.; Zhitnikov, I.; Zhu, B. X.; Zimmermann, S.

doi:10.48550/arxiv.1710.11608

Cited by 20 publications

(43 citation statements)

References 20 publications

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“…The lowest background runs (E = 5.24 kg•yr) yield a BI of 1.6 +1.2 −1.0 •10 −3 cts/(keV•kg•yr), being compatible with the projected background level of 3 cts/(ROI•t•yr) based on the material assay. At E = 10 kg•yr no 0νββ signal candidate has been observed which implies a lower limit of T 0ν 1/2 > 1.9 • 10 25 yr (90% CL) [18].…”

Section: The Majorana Demonstratormentioning

confidence: 90%

“…With 2.5 (1) keV FWHM resolution at Q ββ , the MJD has achieved the best energy resolution of any 0νββ decay experiment [18], and its sub-keV threshold allowed to perform sensitive tests of physics beyond the SM [19]. The lowest background runs (E = 5.24 kg•yr) yield a BI of 1.6 +1.2 −1.0 •10 −3 cts/(keV•kg•yr), being compatible with the projected background level of 3 cts/(ROI•t•yr) based on the material assay.…”

Section: The Majorana Demonstratormentioning

confidence: 99%

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STATUS AND PROSPECTS OF THE SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY OF ⁷⁶Ge

Knöpfle

2019

Particle Physics at the Silver Jubilee of Lomonosov Conferences

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Section: The Majorana Demonstratormentioning

confidence: 90%

Section: The Majorana Demonstratormentioning

confidence: 99%

STATUS AND PROSPECTS OF THE SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY OF ⁷⁶Ge

Knöpfle

2019

Particle Physics at the Silver Jubilee of Lomonosov Conferences

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“…With the completion of construction and the achievement of near-background free data in a 360 keV ROI around the 0νββ Q-value, the MAJORANA DEMONSTRATOR has released its first 0νββ limit 16 . The experiment will continue data taking, with 0νββ sensitivity projected to increase linearly under the current background conditions.…”

Section: Discussionmentioning

confidence: 99%

“…From this exposure, approximately 10 kg yr were selected for a 0νββ analysis with a lowest background index of 1.6 +1.2 −1.0 × 10 −3 c (keV kg yr) −1 , as detailed in Ref. 16. A profile likelihood method was used to determine a 0νββ half-life and background rate that best fit the data.…”

Section: Measuring the 0νββ Half-lifementioning

confidence: 99%

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Recent Results from the Majorana Demonstrator

Gilliss,

Alvis,

Arnquist

et al. 2018

Preprint

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The MAJORANA Collaboration has completed construction and is now operating an array of high purity Ge detectors searching for neutrinoless double-beta decay (0νββ) in 76 Ge. The array, known as the MAJORANA DEMONSTRATOR, is comprised of 44 kg of Ge detectors (30 kg enriched to 88% in 76 Ge) installed in an ultra-low background compact shield at the Sanford Underground Research Facility in Lead, South Dakota. The primary goal of the DEMONSTRATOR is to establish a low-background design that can be scaled to a next-generation tonne-scale experiment. This work reports initial background levels in the 0νββ region of interest. Also presented are recent physics results leveraging P-type point-contact detectors with sub-keV energy thresholds to search for physics beyond the Standard Model; first results from searches for bosonic dark matter, solar axions, Pauli exclusion principle violation, and electron decay have been published. Finally, this work discusses the proposed tonne-scale 76 Ge 0νββ LEGEND experiment.

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Beta and neutrinoless double beta decays with KeV sterile fermions

Abada

Hernández-Cabezudo

Marcano

2019

J. High Energ. Phys.

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Motivated by the capability of the KATRIN experiment to explore the existence of KeV neutrinos in the [1 − 18.5] KeV mass range, we explore the viability of minimal extensions of the Standard Model involving sterile neutrinos (namely the 3 + N frameworks) and study their possible impact in both the beta energy spectrum and the neutrinoless double beta decay effective mass, for the two possible ordering cases for the light neutrino spectrum. We also explore how both observables can discriminate between motivated low-scale seesaw realizations involving KeV sterile neutrinos. Our study concerns the prospect of a Type-I seesaw with two right-handed neutrinos, and a combination of the inverse and the linear seesaws where the Standard Model is minimally extended by two quasi-degenerate sterile fermions. We also discuss the possibility of exploring the latter case searching for doublekinks in KATRIN.

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Search for Zero-Neutrino Double Beta Decay in 76Ge with the Majorana Demonstrator

Cited by 20 publications

References 20 publications

STATUS AND PROSPECTS OF THE SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY OF ⁷⁶Ge

STATUS AND PROSPECTS OF THE SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY OF ⁷⁶Ge

Recent Results from the Majorana Demonstrator

Beta and neutrinoless double beta decays with KeV sterile fermions

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Product

Resources

About

Search for Zero-Neutrino Double Beta Decay in 76Ge with the Majorana Demonstrator

Cited by 20 publications

References 20 publications

STATUS AND PROSPECTS OF THE SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY OF 76Ge

STATUS AND PROSPECTS OF THE SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY OF 76Ge

Recent Results from the Majorana Demonstrator

Beta and neutrinoless double beta decays with KeV sterile fermions

Contact Info

Product

Resources

About

STATUS AND PROSPECTS OF THE SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY OF ⁷⁶Ge

STATUS AND PROSPECTS OF THE SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY OF ⁷⁶Ge