Search for Neutrinoless Double-
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 Decay in 
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 with the Majorana Demonstrator

Aalseth, Craig 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, Paul; Bertrand, F.; Bode, T.; Bos, B.; Boswell, M.; Bradley, A.; Brodzinski, R. L.; Brudanin, V.; Busch, M.; Buuck, M.; Caldwell, A.; Caldwell, T. S.; Chan, Y-D.; Christofferson, C. D.; Chu, Pinghan; Collar, J. I.; Combs, D. C.; Cooper, R. J.; Cuesta, C.; Detwiler, J. A.; Doe, P. J.; Dunmore, J.; Efremenko, Yu.; Ejiri, H.; Elliott, S. R.; Fast, J. E.; Finnerty, P.; Fraenkle, F. M.; Fu, Z.; Fujikawa, B. K.; Fuller, Erin S.; 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, Todd W.; Howe, M. A.; Jasinski, B. R.; Johnson, Rob; Keeter, K. J.; Kephart, Jeremy D.; Kidd, M. F.; Knecht, A.; Коновалов, С. И.; Kouzes, Richard T.; LaFerriere, B. D.; Leon, J.; Lesko, K. T.; Leviner, L. E.; Loach, J. C.; López, A.; 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, Harry S.; Miller, Michael L.; Myslik, J.; Orrell, J. L.; O’Shaughnessy, C.; Othman, G.; Overman, Nicole; Perumpilly, G.; Pettus, W.; Phillips, D. G.; Poon, A. W. P.; Pushkin, K.; Radford, D. C.; Rager, J.; Reeves, J.H.; Reine, A. L.; Rielage, K.; Robertson, R. G. H.; Ronquest, M.; Ruof, N. W.; Schubert, A.; Shanks, B.; Shirchenko, M.; Snavely, K. J.; Snyder, N.; Steele, D.; Suriano, A. M.; Tedeschi, D. J.; 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:10.1103/physrevlett.120.132502

Cited by 185 publications

(135 citation statements)

References 52 publications

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“…Modern 0νββ searches are an extremely sensitive probe of the light Majorana neutrino exchange mechanism in particular and of new lepton number violating physics in general. Bolometric detectors, such as CUORE, are among the leading present searches [4,5,6,7,8]. These detectors feature one of the best energy resolutions in the field, very high signal efficiency and they excel in the range of target isotopes that can be studied [9].…”

Section: Introductionmentioning

confidence: 99%

First data from the CUPID-Mo neutrinoless double beta decay experiment

Schmidt

2020

J. Phys.: Conf. Ser.

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The CUPID-Mo experiment is searching for neutrinoless double beta decay in 100 Mo, evaluating the technology of cryogenic scintillating Li2 100 MoO4 detectors for CUPID (CUORE Upgrade with Particle ID). CUPID-Mo detectors feature background suppression using a dual-readout scheme with Li2MoO4 crystals complemented by Ge bolometers for light detection. The detection of both heat and scintillation light signals allows the efficient discrimination of α from γ&β events. In this proceedings, we discuss results from the first 2 months of data taking in spring 2019. In addition to an excellent bolometric performance of 6.7 keV (FWHM) at 2615 keV and an α separation of better than 99.9% for all detectors, we report on bulk radiopurity for Th and U. Finally, we interpret the accumulated physics data in terms of a limit of T 0ν 1/2 > 3×10 23 yr for 100 Mo and discuss the sensitivity of CUPID-Mo until the expected end of physics data taking in early 2020.

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Section: Introductionmentioning

confidence: 99%

First data from the CUPID-Mo neutrinoless double beta decay experiment

Schmidt

2020

J. Phys.: Conf. Ser.

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“…The potential in Eq. (19) can be implemented in many-body nuclear calculations to obtain bounds on C (9) ππ, πN, N N , which, using knowledge of the g ππ,πN,N N i , can then be converted into bounds on the Wilson coefficients C (9) iL,iR , and hence on the underlying LNV model parameters. We conclude this discussion by noting that the pion contributions to the potential V have appeared throughout the 0νββ literature in the context of various models, see for example [116,117,[56][57][58].…”

Section: Lepton Number Violation From Short Range Mechanismsmentioning

confidence: 99%

“…Because of these outstanding scientific motivations, a vigorous worldwide experimental program exists searching for 0νββ. Current experimental limits are very stringent [12][13][14][15][16][17][18][19][20][21][22][23][24]; for example, the 0νββ lifetime of 136 Xe is T 0ν 1/2 > 1.07 × 10 26 yr [16]. Next-generation, ton-scale, experiments aim to improve sensitivity by one or two orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Lattice QCD Inputs for nuclear double beta decay

Cirigliano

Detmold

Nicholson

et al. 2020

Progress in Particle and Nuclear Physics

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Second order β-decay processes with and without neutrinos in the final state are key probes of nuclear physics and of the nature of neutrinos. Neutrinoful double-β decay is the rarest Standard Model process that has been observed and provides a unique test of the understanding of weak nuclear interactions. Observation of neutrinoless double-β decay would reveal that neutrinos are Majorana fermions and that lepton number conservation is violated in nature. While significant progress has been made in phenomenological approaches to understanding these processes, establishing a connection between these processes and the physics of the Standard Model and beyond is a critical task as it will provide input into the design and interpretation of future experiments. The strong-interaction contributions to double-β decay processes are non-perturbative and can only be addressed systematically through a combination of lattice Quantum Chromoodynamics (LQCD) and nuclear many-body calculations. In this review, current efforts to establish the LQCD connection are discussed for both neutrinoful and neutrinoless double-β decay. LQCD calculations of the hadronic contributions to the neutrinoful process nn → ppe − e −ν eνe and to various neutrinoless pionic transitions are reviewed, and the connections of these calculations to the phenomenology of double-β decay through the use of effective field theory (EFTs) is highlighted. At present, LQCD calculations are limited to small nuclear systems, and to pionic subsystems, and require matching to appropriate EFTs to have direct phenomenological impact. However, these calculations have already revealed qualitatively that there are terms in the EFTs that can only be constrained from double-β decay processes themselves or using inputs from LQCD. Future prospects for direct calculations in larger nuclei are also discussed. many-body methods and effective field theory (EFT) analysis of the transition operators, where lattice QCD can provide key input. To improve upon this situation, recent efforts have advocated an "endto-end" EFT analysis of 0νββ to link the scale Λ of LNV to nuclear scales. This multi-prong approach includes various steps:1. The use of the Standard Model EFT to link the scale Λ of LNV to the hadronic scale Λ χ ∼ O(1) GeV, where non-perturbative QCD effects arise. This step is by now mature: the operator basis (to which any underlying model can be matched) is known up to dimension-nine and the renormalization group evolution of these operators under strong interactions is known. Light new degrees of freedom (such as sterile neutrinos) can also be included in this framework.2. The matching of the quark-gluon level EFT to hadronic EFTs such as Chiral Perturbation Theory (χPT) in the meson and single nucleon sector, and chiral EFT and pionless EFT in the multinucleon sector. This step can be performed consistently in the strong and weak sectors of the theory, which in the case of interest here involves ∆L = 2 transition operators. The form of the transition operators is known to...

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“…The Majorana Demonstrator [5] is searching for 0νββ of 76 Ge using HPGe detectors. The experiment consists of two separate modules, consisting of arrays of detectors operated in separate cryostats in vacuum.…”

Section: The Majorana Demonstratormentioning

confidence: 99%

“…This analysis uses the standard channel selection, data cleaning, and muon cuts developed for the Majorana Demonstrator's 0νββ analysis [5]. In addition, the detector hits in coincidence with candidate gamma hits will provide additional observables that can be used to further cut backgrounds.…”

Section: Background Cuts and Detection Efficiencymentioning

confidence: 99%

Results of the MAJORANA DEMONSTRATOR’s Search for Double-Beta Decay of ⁷⁶Ge to Excited States of ⁷⁶Se

Guinn

Arnquist

Avignone

et al. 2020

J. Phys.: Conf. Ser.

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The Majorana Demonstrator is searching for double-beta decay of 76 Ge to excited states (E.S.) in 76 Se using a modular array of high purity Germanium detectors. 76 Ge can decay into three E.S.s of 76 Se. The E.S. decays have a clear event signature consisting of a ββ-decay with the prompt emission of one or two γ-rays, resulting in with high probability in a multi-site event. The granularity of the Demonstrator detector array enables powerful discrimination of this event signature from backgrounds. Using 21.3 kg-y of isotopic exposure, the Demonstrator has set world leading limits for each E.S. decay, with 90% CL lower half-life limits in the range of (0.56 − 2.1) · 10 24 y. In particular, for the 2ν transition to the first 0 + E.S. of 76 Se, a lower half-life limit of 0.68 · 10 24 at 90% CL was achieved.

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Search for Neutrinoless Double- β Decay in Ge76 with the Majorana Demonstrator

Cited by 185 publications

References 52 publications

First data from the CUPID-Mo neutrinoless double beta decay experiment

First data from the CUPID-Mo neutrinoless double beta decay experiment

Lattice QCD Inputs for nuclear double beta decay

Results of the MAJORANA DEMONSTRATOR’s Search for Double-Beta Decay of ⁷⁶Ge to Excited States of ⁷⁶Se

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Search for Neutrinoless Double- β Decay in Ge76 with the Majorana Demonstrator

Cited by 185 publications

References 52 publications

First data from the CUPID-Mo neutrinoless double beta decay experiment

First data from the CUPID-Mo neutrinoless double beta decay experiment

Lattice QCD Inputs for nuclear double beta decay

Results of the MAJORANA DEMONSTRATOR’s Search for Double-Beta Decay of 76Ge to Excited States of 76Se

Contact Info

Product

Resources

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Results of the MAJORANA DEMONSTRATOR’s Search for Double-Beta Decay of ⁷⁶Ge to Excited States of ⁷⁶Se