The status and initial results of the Majorana demonstrator experiment

Guiseppe, V. E.; Abgrall, N.; Alvis, S. I.; Arnquist, I. J.; Avignone, F. T.; Barabash, A. S.; Barton, C. J.; Bertrand, F. E.; Bode, T.; Bradley, A.; Brudanin, V.; Busch, M.; Buuck, M.; Caldwell, T. S.; Chan, Y. D.; Christofferson, C. D.; Chu, Pinghan; Cuesta, C.; Detwiler, J. A.; Dunagan, C.; Efremenko, Yu.; Ejiri, H.; Elliott, S. R.; Gilliss, T.; Giovanetti, G. K.; Green, M. P.; Gruszko, J.; Guinn, I. S.; Haufe, C. R.; Hehn, L.; Henning, R.; Hoppe, E. W.; Howe, M. A.; Keeter, K. J.; Kidd, M. F.; Коновалов, С. И.; Kouzes, Richard T.; López, A.; Martin, R. D.; Massarczyk, R.; Meijer, S. J.; Mertens, S.; Myslik, J.; O’Shaughnessy, C.; Othman, G.; Poon, A. W. P.; Radford, D. C.; Rager, J.; Reine, A. L.; Rielage, K.; Robertson, R. G. H.; Rouf, N. W.; Shanks, B.; Shirchenko, M.; Suriano, A. M.; Tedeschi, D. J.; Trimble, J. E.; Varner, R. L.; Vasilyev, S.; Vetter, K.; Vorren, K.; White, B. R.; Wilkerson, J. F.; Wiseman, C.; Xu, W.; Yakushev, E.; Yu, C.‐H.; Yumatov, V.; Zhitnikov, I.; Zhu, B. X.

doi:10.1063/1.5007635

Cited by 5 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The observation of 0νββ decay would prove in fact that neutrinos have a Majorana mass component [1,2] and that lepton number is not conserved, thus shedding a new light on fundamental issues as the matter-antimatter asymmetry and the origin of neutrino masses [3,4,5]. For this reason a wide experimental effort is placed worldwide in the search for neutrinoless double beta decay of several candidate nuclei, most notably 76 Ge [6,7], 136 Xe [8,9,10] and 130 Te [11,12]. The current best limits on the 0νββ half-life lie in the range of 10 24 − 10 26 yr, depending on the specific nucleus.…”

Section: Introductionmentioning

confidence: 99%

Searching for neutrinoless double beta decay with GERDA

Agostini¹,

Bakalyarov²,

Balata³

et al. 2017

Preprint

Self Cite

View full text Add to dashboard Cite

The GERmanium Detector Array (Gerda) experiment located at the INFN Gran Sasso Laboratory (Italy), is looking for the neutrinoless double beta decay of 76 Ge, by using highpurity germanium detectors made from isotopically enriched material. The combination of the novel experimental design, the careful material selection for radio-purity and the active/passive shielding techniques result in a very low residual background at the Q-value of the decay, about 10 −3 cts/(keV•kg•yr). This makes Gerda the first experiment in the field to be background-free for the complete design exposure of 100 kg•yr. A search for neutrinoless double beta decay was performed with a total exposure of 47.7 kg•yr: 23.2 kg•yr come from the second phase (Phase II) of the experiment, in which the background is reduced by about a factor of ten with respect to the previous phase. The analysis presented in this paper includes 12.4 kg•yr of new Phase II data. No evidence for a possible signal is found: the lower limit for the half-life of 76 Ge is 8.0 • 10 25 yr at 90% CL. The experimental median sensitivity is 5.8 • 10 25 yr. The experiment is currently taking data. As it is running in a background-free regime, its sensitivity grows linearly with exposure and it is expected to surpass 10 26 yr within 2018.

show abstract

Section: Introductionmentioning

confidence: 99%

Searching for neutrinoless double beta decay with GERDA

Agostini¹,

Bakalyarov²,

Balata³

et al. 2017

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Unlike in Ar and N 2 carrier gases, no difference in the τ-values was observed in Xe carrier gas when the gas pressure was increased. The measurements of 222 Rn breakthrough times in carrier gases in various charcoals allowed calculating 222 Rn dynamic adsorption coefficients k a using relationship (3), which determine optimal parameters for charcoal traps. The k a -values of 222 Rn in N 2 , Ar and Xe gases were calculated for various charcoals and are presented in Table 4.…”

Section: Resultsmentioning

confidence: 99%

“…Modern rare-event search experiments require lowradioactivity Time Projection Chambers (TPCs) to achieve high detection sensitivities. Noble gases such as argon (Ar) and xenon (Xe) are well-suited as target media for Dark Matter (DM) and Neutrinoless Double Beta Decay (NDBD) [1,2,3]. They are both excellent scintillators.…”

Section: Introductionmentioning

confidence: 99%

Study of radon reduction in gases for rare event search experiments

Pushkin¹,

Akerlof²,

Anbajagane³

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

The noble elements, argon and xenon, are frequently employed as the target and event detector for weakly interacting particles such as neutrinos and Dark Matter. For such rare processes, background radiation must be carefully minimized. Radon provides one of the most significant contaminants since it is an inevitable product of trace amounts of natural uranium. To design a purification system for reducing such contamination, the adsorption characteristics of radon in nitrogen, argon, and xenon carrier gases on various types of charcoals with different adsorbing properties and intrinsic radioactive purities have been studied in the temperature range of 190-295 K at flow rates of 0.5 and 2 standard liters per minute. Essential performance parameters for the various charcoals include the average breakthrough times (τ), dynamic adsorption coefficients (k a ) and the number of theoretical stages (n). It is shown that the k a -values for radon in nitrogen, argon, and xenon increase as the temperature of the charcoal traps decreases, and that they are significantly larger in nitrogen and argon than in xenon gas due to adsorption saturation effects. It is found that, unlike in xenon, the dynamic adsorption coefficients for radon in nitrogen and argon strictly obey the Arrhenius law. The experimental results strongly indicate that nitric acid etched Saratech is the best candidate among all used charcoal brands. It allows reducing total radon concentration in the LZ liquid Xe detector to meet the ultimate goal in the search for Dark Matter.

show abstract

“…Nowadays there are several experiments running to observe the 0ν2β decays, and the most stringent experimental bounds on the processes are obtained by GERDA [4,5] and KamLAND-Zen [6,7]. They adopt suitable approaches and nuclei such as 76 Ge and 136 Xe respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The NMEs adopted here are obtained within the framework of the microscopic interacting meson model for nuclei[28], and the uncertainties for NMEs calculations from the various nuclear structure models are quite wild, here we remind only that the NMEs obtained by various approaches are varying by a factor of (2-3) roughly[74] 5. The matrix equation(13) with M L = 0 indicates the masses are acquired by type-I seesaw mechanism; it with M D = 0 indicates the masses are acquired by type-II seesaw mechanism; it in general feature indicates the masses are acquired by type-I+II seesaw mechanism.…”

mentioning

confidence: 99%

Nuclear 0ν2β decays in B-L symmetric SUSY model and in TeV scale left–right symmetric model

Yang¹,

zhang²,

Feng³

2022

Commun. Theor. Phys.

View full text Add to dashboard Cite

In this paper we take B-L supersymmetric standard model (B-LSSM) and TeV scale left-right symmetric model (LRSM) as two representations of the two kinds of new physics models to study the nuclear neutrinoless double beta decays ($0\nu2\beta$) so as to see the senses onto these two kinds of models when the decays are taken into account additionally. Within the parameter spaces allowed by all the exist experimental data, the decay half-life of the nucleus $^{76}$Ge and $^{136}$Xe, $T^{0\nu}_{1/2}$($^{76}$Ge, $^{136}$Xe), is precisely calculated and the results are presented properly. Based on the numerical results, we conclude that the room of LRSM type models for the foreseeable future experimental observations on the decays is greater than that of B-LSSM type models.

show abstract

The status and initial results of the Majorana demonstrator experiment

Cited by 5 publications

References 17 publications

Searching for neutrinoless double beta decay with GERDA

Searching for neutrinoless double beta decay with GERDA

Study of radon reduction in gases for rare event search experiments

Nuclear 0ν2β decays in B-L symmetric SUSY model and in TeV scale left–right symmetric model

Contact Info

Product

Resources

About