The majorana neutrinoless double-beta decay experiment

Aalseth, Craig E.; Anderson, Dale N.; Arthur, R.J.; Avignone, F. T.; Baktash, C.; Ball, T.; Barabash, A. S.; Brodzinski, R. L.; Brudanin, V.; Bugg, W.; Champagne, Arthur E; Chan, Y. D.; Cianciolo, T. V.; Collar, J. I.; Creswick, R.; Doe, P. J.; Dunham, Glen; Easterday, S.; Efremenko, Y. V.; Egorov, V.; Ejiri, H.; Elliott, S. R.; Ely, James H.; Fallon, P.; Farach, Horácio A.; Gaitskell, R. J.; Gehman, V. M.; Grzywacz, R.; Hazma, R.; Hime, H.; Hossbach, Todd W.; Jordan, David V.; Kazkaz, K.; Kephart, Jeremy D.; King, G. S.; Kochetov, O.; Коновалов, С. И.; Kouzes, Richard T.; Lesko, K. T.; Macchiavelli, A. O.; Miley, H.S.; Mills, G. B.; Nomachi, M.; Palms, J.M.; Pitts, W. K.; Poon, A. W. P.; Radford, D. C.; Reeves, J.H.; Robertson, R. G. H.; Rohm, Ryan; Rykaczewski, K. P.; Saborov, K.; Sandukovsky, V. G.; Shawley, C.; Stekhanov, V.; Tornow, W.; Water, R. G. Van de; Vetter, K.; Warner, R.A.; Webb, J.; Wilkerson, J. F.; Wouters, Jan; Young, A. R.; Yumatov, V.

doi:10.1134/1.1825519

Cited by 38 publications

(25 citation statements)

References 30 publications

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“…Lead was chosen as the target material for run I as it is one of the most commonly used materials for high-Z shielding in deep underground experiments [30,21,18,22].…”

Section: The Experimental Setupmentioning

confidence: 99%

The muon-induced neutron indirect detection EXperiment, MINIDEX

Abt

Caldwell

Carissimo

et al. 2017

Astroparticle Physics

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A new experiment to quantitatively measure neutrons induced by cosmicray muons in selected high-Z materials is introduced. The design of the Muon-Induced Neutron Indirect Detection EXperiment, MINIDEX, and the results from its first data taking period are presented as well as future plans. Neutron production in high-Z materials is of particular interest as such materials are used for shielding in low-background experiments. The design of next-generation large-scale experiments searching for neutrinoless double beta decay or direct interactions of dark matter requires reliable Monte Carlo simulations of background induced by muon interactions. The first five months of operation already provided a valuable data set on neutron production and neutron transport in lead. A first round of comparisons between MINIDEX data and Monte Carlo predictions obtained with two GEANT4based packages is presented. The rate of muon-induced events is overall a factor three to four higher in data than predicted by the Monte Carlo packages. In addition, the time evolution of the muon-induced signal is not well described by the simulations.

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“…Lead was chosen as the target material for run I as it is one of the most commonly used materials for high-Z shielding in deep underground experiments [30,21,18,22].…”

Section: The Experimental Setupmentioning

confidence: 99%

The muon-induced neutron indirect detection EXperiment, MINIDEX

Abt

Caldwell

Carissimo

et al. 2017

Astroparticle Physics

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“…One of the most remarkable aspects of the supersymmetric gauge theories is that they have a vacuum degeneracy at the classical level. It is a well established fact that the renormalizable scalar potential is a sum of squares of F -terms and D-terms which implies that it can vanish identically along certain flat directions 10 in the space of fields 11 . The properties of the space of flat directions of a supersymmetric model are crucial for making realistic considerations in cosmology and whenever the behaviour of the theory at large field strengths is an issue.…”

Section: Flat Direction Of µνSsm Modelmentioning

confidence: 99%

“…Note that the large range is due to the uncertainty in the nuclear matrix elements. Upcoming experiments like CUORE [9], GERDA [10] and MAJORANA [11] are expected to further improve these results with projected sensitivity of about 0.05 eV. Finally, it must be mentioned that some of the strongest bounds on the overall scale for neutrino masses come from cosmology.…”

Section: Introductionmentioning

confidence: 99%

Flat Directions and Leptogenesis in a “New” uv SSM

Rodriguez

Vancea

2017

OALib

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In this paper, we give a brief review of the Minimal Supersymmetric Standard Model (MSSM) and " µ from ν " Supersymmetric Standard Model ( µν SSM). Then we propose a generalization of µν SSM in order to explain the recent ATLAS, CMS and LHCb results. This "new" µν SSM generalizes the superpotential suppot W of µν SSM by including two terms that generate a mixing among leptons, gauginos and higgsinos while keeping the charginos and neutralinos masses unchanged. Also, it is potentially interesting for cosmological applications as it displays flat directions of the superpotential and a viable leptogenesis mechanism. Subject AreasModern Physics KeywordsSupersymmetric Models

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“…Experiments designed to study neutrinoless double-β decay in 76 Ge typically employ enriched germanium diodes as an active detection system. These crystals have excellent energy resolution in the end-point region, typically corresponding to a resolution of ≈0.2% or about 4 keV [53]. The end-point energy of ββ decay in 76 Ge has been measured to be 2039.061 (7) keV [54].…”

Section: Cross Sections Relevant To 0νββ Decay Searchesmentioning

confidence: 99%

Neutron inelastic scattering in natural Cu as a background in neutrinoless double-βdecay experiments

Boswell

Elliott²,

Perepelitsa³

et al. 2013

Phys. Rev. C

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Background: Experiments designed to study rare processes, such as neutrinoless double-β decay (0νββ), are crucial tests for physics beyond the standard model. These experiments rely on reducing the intrinsic radioactive background to unprecedented levels, while adequately shielding the detectors from external sources of radioactivity. Purpose: The purpose of this work is focused on understanding the background rates from neutron interactions in Cu shielding in regions around the Q values of many candidate 0νββ decay isotopes, as well as providing data for benchmarking Monte Carlo simulations of background events. Methods: Using the broad-spectrum neutron beam at Los Alamos Neutron Science Center, we have measured γ rays emitted from inelastic neutron scattering on nat Cu. Results: We extracted the level cross sections from the γ -production cross section for 46 energy levels in nat Cu. These level cross sections were compared with the available experimental data, as well as the ENDF/B-VII evaluation for discrete levels. Conclusions: For energy levels above 2 MeV we found significant discrepancies between the suggested level cross sections for both nuclei and our data. We found reasonable agreement between our measurement and the ENDF/B-VII evaluation for the total neutron inelastic cross section in 63 Cu. Our measurement of the total neutron inelastic scattering cross section in 65 Cu was 30% lower than the ENDF/B-VII evaluations, which we attribute to unobserved transitions in 65 Cu. Furthermore, we found that the implementation of the ENDF/B-VII evaluation in simulations did not properly model the decay properties of the nucleus to the degree necessary for estimating backgrounds in rear-event searches. Finally, we examined the potential implications of our measurements on 0νββ measurements and found that many of the commonly studied 0νββ isotopes had Q values below the cutoff for ENDF/B-VII evaluated discrete levels in either Cu nucleus.

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The majorana neutrinoless double-beta decay experiment

Cited by 38 publications

References 30 publications

The muon-induced neutron indirect detection EXperiment, MINIDEX

The muon-induced neutron indirect detection EXperiment, MINIDEX

Flat Directions and Leptogenesis in a “New” uv SSM

Neutron inelastic scattering in natural Cu as a background in neutrinoless double-βdecay experiments

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