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Journal articles on the topic 'Data analysis, neutrinoless double beta decay'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Horoi, Mihai. "Double Beta Decay: A Shell Model Approach." Physics 4, no. 4 (2022): 1135–49. http://dx.doi.org/10.3390/physics4040074.

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Studies of weak interaction in nuclei are important tools for testing different aspects of the fundamental symmetries of the Standard Model. Neutrinoless double beta decay offers an unique venue of investigating the possibility that neutrinos are Majorana fermions and that the lepton number conservation law is violated. Here, I use a shell model approach to calculate the nuclear matrix elements needed to extract the lepton-number-violating parameters of a few nuclei of experimental interest from the latest experimental lower limits of neutrinoless double beta decay half-lives. The analysis pre

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2

Neacsu, Andrei, and Mihai Horoi. "Neutrinoless Double-Beta Decay Investigations of 82Se Using Three Shell Model Hamiltonians." Symmetry 16, no. 8 (2024): 974. http://dx.doi.org/10.3390/sym16080974.

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Neutrinoless double-beta decay is considered one of the most promising processes that would help clarify some of the symmetry-breaking problems in our understanding of the observable universe. Recent studies of neutrinoless double-beta decay matrix elements have employed statistical approaches based on modified shell model effective Hamiltonians for 48Ca (Phys. Rev. C 106, 054302 (2022)) and 136Xe (Phys. Rev. C 107, 045501 (2023)). The analyses rely on inducing perturbations in the starting effective Hamiltonians to observe the behavior of a wide range of observables, besides the 0νββ) NME, th

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3

Sevestrean, Vasile-Alin, and Sabin Stoica. "Theoretical Advances in Beta and Double-Beta Decay." Symmetry 16, no. 4 (2024): 390. http://dx.doi.org/10.3390/sym16040390.

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Weak interaction processes continue to be hot topics in fundamental physics research. In this paper, we briefly review some recent advances in the theoretical study of beta and double-beta decays that include both the nuclear and atomic part of these processes. On the nuclear side, we present a statistical approach for the computation of the nuclear matrix elements (NME) for neutrinoless double-beta (0νββ). A range of NME values, the most probable value for NME, and the associated theoretical uncertainty are given. Correlations with other related observables are shown as well. On the atomic si

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Caminata, Alessio, Douglas Adams, Chris Alduino, et al. "Results from the Cuore Experiment †." Universe 5, no. 1 (2019): 10. http://dx.doi.org/10.3390/universe5010010.

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The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay that has been able to reach the 1-ton scale. The detector consists of an array of 988 TeO 2 crystals arranged in a cylindrical compact structure of 19 towers, each of them made of 52 crystals. The construction of the experiment was completed in August 2016 and the data taking started in spring 2017 after a period of commissioning and tests. In this work we present the neutrinoless double beta decay results of CUORE from examining a total TeO 2 exposure o

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KLAPDOR-KLEINGROTHAUS, H. V. "FROM NUCLEAR PHYSICS TO PHYSICS BEYOND THE STANDARD MODEL: FIRST EVIDENCE FOR LEPTON NUMBER VIOLATION AND THE MAJORANA CHARACTER OF NEUTRINOS." International Journal of Modern Physics D 13, no. 10 (2004): 2107–26. http://dx.doi.org/10.1142/s0218271804006656.

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Nuclear double beta decay provides an extraordinarily broad potential to search for beyond-standard-model physics. The occurrence of the neutrinoless decay(0νββ) mode has fundamental consequences: first, the total lepton number is not conserved, and second, the neutrino is a Majorana particle. Furthermore, the measured effective mass provides an absolute scale of the neutrino mass spectrum. In addition, double beta experiments yield sharp restrictions for other beyond-standard-model physics. These include SUSY models (R-parity breaking and conserving), leptoquarks (leptoquark-Higgs coupling),

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6

Khanbekov, N. D., V. V. Alenkov, A. A. Burenkov, O. A. Buzanov, and V. N. Kornoukhov. "Data analysis of the internal background measurements of 40Ca100MoO4 scintillation crystals." Nuclear Physics and Atomic Energy 14, no. 2 (2013): 199–204. https://doi.org/10.15407/jnpae2013.02.199.

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The sensitivity of neutrinoless double beta (0ν2β) decay experiments is mainly dependent on the internal background of a detector which, in its turn, is defined by the purity of material and possibility for selection of background events. The AMoRE (Advanced Mo based Rare process Experiment) collaboration plans to use 40Ca100MoO4 scintillation crystals as a detector for search of 0ν2β decay of 100Mo isotope. A purpose of this paper is further investigation of internal background of 40Ca100MoO4 scintillation elements with a low background setup at YangYang underground laboratory. We present new

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Agostini, M., J. A. Detwiler, P. Finnerty, et al. "The MGDO software library for data analysis in Ge neutrinoless double-beta decay experiments." Journal of Physics: Conference Series 375, no. 4 (2012): 042027. http://dx.doi.org/10.1088/1742-6596/375/1/042027.

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8

Verma, Rohit. "Lepton textures and neutrino oscillations." International Journal of Modern Physics A 29, no. 21 (2014): 1444009. http://dx.doi.org/10.1142/s0217751x14440096.

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A systematic analysis of the textures arising in lepton mass matrices have been carried out using unitary transformations and condition of naturalness for the Dirac and Majorana neutrino possibilities. It is observed that the recent three neutrino oscillation data together with the effective mass in neutrinoless double beta decay provide vital clues in predicting the general structures of these lepton mass matrices.

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9

FUKUYAMA, TAKESHI, KOUICHI MATSUDA, and HIROYUKI NISHIURA. "CONSTRAINTS OF MIXING ANGLES FROM NEUTRINO OSCILLATION EXPERIMENTS AND NEUTRINOLESS DOUBLE BETA DECAY." Modern Physics Letters A 13, no. 28 (1998): 2279–87. http://dx.doi.org/10.1142/s0217732398002424.

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From the analyses of the recent data of neutrino oscillation experiments (especially the CHOOZ and the super-Kamiokande experiments), we discuss how these data affect the neutrinoless double beta decay ((ββ)0ν) rate and vice versa assuming that neutrinos are Majorana particles. For the case of m1~m2≪m3 (mi are neutrino masses), we obtain, from the data of the CHOOZ and super-Kamiokande, 0.28 ≲ sin 2θ23≲ 0.76 and sin 2θ13≲ 0.05. Combining the latter constraint with the analysis of the "averaged" neutrino mass <mν> appeared in (ββ)0ν, we find that [Formula: see text], which leads to the co

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Belli, Pierluigi, R. Bernabei, V. B. Brudanin, et al. "Search for Double Beta Decay of 106Cd with an Enriched 106CdWO4 Crystal Scintillator in Coincidence with CdWO4 Scintillation Counters." Universe 6, no. 10 (2020): 182. http://dx.doi.org/10.3390/universe6100182.

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Studies on double beta decay processes in 106Cd were performed by using a cadmium tungstate scintillator enriched in 106Cd at 66% (106CdWO4) with two CdWO4 scintillation counters (with natural Cd composition). No effect was observed in the data that accumulated over 26,033 h. New improved half-life limits were set on the different channels and modes of the 106Cd double beta decay at level of limT1/2∼1020−1022 yr. The limit for the two neutrino electron capture with positron emission in 106Cd to the ground state of 106Pd, T1/22νECβ+≥2.1×1021 yr, was set by the analysis of the 106CdWO4 data in c

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11

Cappuzzello, Francesco, Luis Acosta, Clementina Agodi, et al. "Recent experimental activity on heavy-ion induced reactions within the NUMEN project." EPJ Web of Conferences 252 (2021): 04001. http://dx.doi.org/10.1051/epjconf/202125204001.

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The possibility to use a special class of heavy-ion induced direct reactions, such as double charge exchange reactions, is discussed in view of their application to extract information that may be helpful to determinate the nuclear matrix elements entering in the expression of neutrinoless double beta decay half-life. The strategies adopted in the experimental campaigns performed at INFN - Laboratori Nazionali del Sud are briefly described, emphasizing the advantages of the multi-channel approach to nuclear reaction data analysis.

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Sgouros, Onoufrios, Francesco Cappuzzello, Manuela Cavallaro, et al. "Recent results on the analysis of the ¹⁸O+⁴⁸Ti collision at 275 MeV: Single charge exchange reaction." EPJ Web of Conferences 304 (2024): 01005. http://dx.doi.org/10.1051/epjconf/202430401005.

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The present work is inherent to the NUMEN project that aims at providing data-driven information for the nuclear matrix elements of the neutrinoless double beta decay through the study of heavy-ion induced double charge exchange reactions. This is a formidable task since during a nuclear collision, the same final states may be populated through various reaction mechanisms. In this respect, understanding the degree of competition between successive nucleon transfer and charge exchange reactions is crucial for the proper description of the meson-exchange mechanism. To this purpose, the reaction

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Kitabayashi, Teruyuki, and Masaki Yasuè. "Seesaw model and two zero flavor neutrino texture." International Journal of Modern Physics A 32, no. 06n07 (2017): 1750034. http://dx.doi.org/10.1142/s0217751x17500348.

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In the two zero flavor neutrino mass matrix scheme with nonvanishing Majorana effective mass [Formula: see text] for the neutrinoless double beta decay, four textures are compatible with observed data. We obtain the complete list of the possible textures of four zero Dirac neutrino mass matrix [Formula: see text] in the seesaw mechanism providing these four flavor neutrino textures. Explicit analytical analysis of [Formula: see text] turns out to provide the relation of [Formula: see text].

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Civitarese, Osvaldo, Jouni Suhonen, and Kai Zuber. "Combining data from high-energy pp-reactions and neutrinoless double-beta decay: Limits on the mass of the right-handed boson." International Journal of Modern Physics E 25, no. 10 (2016): 1650081. http://dx.doi.org/10.1142/s0218301316500816.

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From the recently established lower-limits on the nonobservability of the neutrinoless double-beta decay of [Formula: see text]Ge (GERDA collaboration) and [Formula: see text]Xe (EXO-200 and KamLAND-Zen collaborations), combined with the ATLAS and CMS data, we extract limits for the left–right (LR) mixing angle, [Formula: see text], of the [Formula: see text] electroweak Hamiltonian. For the theoretical analysis, which is a model dependent, we have adopted a minimal extension of the Standard Model (SM) of Electroweak Interactions belonging to the [Formula: see text] representation. The nuclear

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15

Lesgourgues, Julien, and Sergio Pastor. "Neutrino Mass from Cosmology." Advances in High Energy Physics 2012 (2012): 1–34. http://dx.doi.org/10.1155/2012/608515.

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Neutrinos can play an important role in the evolution of the universe, modifying some of the cosmological observables. In this contribution we summarize the main aspects of cosmological relic neutrinos, and we describe how the precision of present cosmological data can be used to learn about neutrino properties, in particular their mass, providing complementary information to beta decay and neutrinoless double-beta decay experiments. We show how the analysis of current cosmological observations, such as the anisotropies of the cosmic microwave background or the distribution of large-scale stru

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16

Cavallaro, M., C. Agodi, J. I. Bellone, et al. "A focus on selected perspectives of the NUMEN project." Journal of Physics: Conference Series 2340, no. 1 (2022): 012036. http://dx.doi.org/10.1088/1742-6596/2340/1/012036.

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Abstract The use of double charge exchange reactions is discussed in view of their application to extract information that may be helpful to determinate the nuclear matrix elements entering in the expression of neutrinoless double beta decay half-life. The strategy adopted in the experimental campaigns performed at INFN - Laboratori Nazionali del Sud and in the analysis methods within the NUMEN project is briefly described, emphasizing the advantages of the multi-channel approach to nuclear reaction data analysis. An overview on the research and development activities on the MAGNEX magnetic sp

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Carbone, D., C. Agodi, J. I. Bellone, et al. "The NUMEN project: probing nuclear response to weak interaction by nuclear reactions." Journal of Physics: Conference Series 2586, no. 1 (2023): 012133. http://dx.doi.org/10.1088/1742-6596/2586/1/012133.

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Abstract Different reactions channels induced by the 18O + 40Ca collisions at 275 MeV incident energy are simultaneously measured and analysed consistently within the same reaction and structure frameworks within the NUMEN project. The project aims to provide data-driven information for the determination of the nuclear matrix elements involved in the neutrinoless double beta decay. In particular, the elastic and inelastic scattering, one- and two-proton transfer, one-neutron transfer, and single charge exchange reactions are explored. The full quantum-mechanical calculations, performed by incl

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18

Adhikari, G., S. Al Kharusi, E. Angelico, et al. "nEXO: neutrinoless double beta decay search beyond 10²⁸ year half-life sensitivity." Journal of Physics G: Nuclear and Particle Physics 49, no. 1 (2021): 015104. http://dx.doi.org/10.1088/1361-6471/ac3631.

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Abstract The nEXO neutrinoless double beta (0νββ) decay experiment is designed to use a time projection chamber and 5000 kg of isotopically enriched liquid xenon to search for the decay in 136Xe. Progress in the detector design, paired with higher fidelity in its simulation and an advanced data analysis, based on the one used for the final results of EXO-200, produce a sensitivity prediction that exceeds the half-life of 1028 years. Specifically, improvements have been made in the understanding of production of scintillation photons and charge as well as of their transport and reconstruction i

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19

Klimenko, A. A., and N. S. Rumyantseva. "Limits of Majorana neutrino mass from combined analysis of data from 76Ge and 136Xe neutrinoless double beta decay experiments." Physics of Particles and Nuclei 48, no. 1 (2017): 21–26. http://dx.doi.org/10.1134/s1063779616060125.

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20

Di Marcello, V., A. Ianni, and G. Panella. "Numerical analysis of radon behavior in radon-suppressed clean room environments." Journal of Instrumentation 17, no. 06 (2022): P06033. http://dx.doi.org/10.1088/1748-0221/17/06/p06033.

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Abstract Radon-free clean rooms are essential for the production and assembly of components adopted in low-background experiments. In particular, long-lived radon decay products are often problematic for rare events searches, such as low energy neutrino interactions, direct dark matter detection, and neutrinoless double beta decay. These isotopes can easily deposit onto surfaces exposed to radon, leading to a residual background that can limit the sensitivity of experiments. In order to mitigate this background source, construction of detectors in radon-reduced environments is essential. In th

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21

Yang, Jingzhe, Yang Tian, Wenhan Dai, et al. "A feasibility study of multi-electrode high-purity germanium detector for ⁷⁶Ge neutrinoless double beta decay searching." Journal of Instrumentation 18, no. 05 (2023): P05025. http://dx.doi.org/10.1088/1748-0221/18/05/p05025.

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Abstract Experiments to search for neutrinoless double-beta (0νββ) decay of 76Ge using a high-purity germanium (HPGe) detector rely heavily on background suppression technologies to enhance their sensitivities. In this work, we proposed a pulse-shape analysis method based on a neural network (NN) and a light gradient boosting machine (lightGBM; LGB) to discriminate single-electron (background) and double-electrons (0νββ signal) events in a multi-electrode HPGe detector. In this paper, we describe a multi-electrode HPGe detector system, a data-processing system, and pulse-shape simulation proce

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Li, Aobo. "KamLAND-Zen 800 Status and Prospect with the Artificial Intelligence Powered Analysis." Journal of Physics: Conference Series 2156, no. 1 (2021): 012114. http://dx.doi.org/10.1088/1742-6596/2156/1/012114.

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Abstract The discovery of neutrinoless double beta decay (0υββ) would shed light on the persistent puzzle surrounding the origin of neutrino mass and help explain the matter-dominated universe. KamLAND-Zen is one of the leading experiments searching for 0υββ. The first phase of the experiment, called KamLAND-Zen 400, set a world-leading limit on 0υββ lifetime. After the conclusion of KamLAND-Zen 400, a brand new mini-balloon with a larger volume and cleaner surface were instrumented to contain 745 kg of 136Xe. Since Jan. 2019, KamLAND-Zen 800 has started data-taking and aims to improve on the

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Schwarz, Mario, Patrick Krause, Andreas Leonhardt, et al. "Liquid Argon Instrumentation and Monitoring in LEGEND-200." EPJ Web of Conferences 253 (2021): 11014. http://dx.doi.org/10.1051/epjconf/202125311014.

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LEGEND is the next-generation experiment searching for the neutrinoless double beta decay in 76Ge. The first stage, LEGEND-200, takes over the cryogenic infrastructure of GERDA at LNGS: an instrumented water tank surrounding a 64 m3 liquid argon cryostat. Around 200 kg of Ge detectors will be deployed in the cryostat, with the liquid argon acting as cooling medium, high-purity passive shielding and secondary detection medium. For the latter purpose, a liquid argon instrumentation is developed, based on the system used in GERDA Phase II. Wavelength shifting fibers coated with TPB are arranged i

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Campani, A., D. Q. Adams, C. Alduino, et al. "Status and results from the CUORE experiment." International Journal of Modern Physics A 35, no. 36 (2020): 2044016. http://dx.doi.org/10.1142/s0217751x20440169.

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The Cryogenic Underground Observatory for Rare Events (CUORE) is a tonne-scale cryogenic experiment located at the Laboratori Nazionali del Gran Sasso that exploits bolometric technique to search for neutrinoless double beta decay [Formula: see text] of [Formula: see text]Te. The detector consists of a segmented array of 988 natural [Formula: see text] cubic crystals arranged in a cylindrical compact structure of 19 towers. The detector construction was completed in August 2016 and data taking started in Spring 2017. In this work, we present a brief description of the bolometric technique for

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Adams, D. Q., C. Alduino, K. Alfonso, et al. "An energy-dependent electro-thermal response model of CUORE cryogenic calorimeter." Journal of Instrumentation 17, no. 11 (2022): P11023. http://dx.doi.org/10.1088/1748-0221/17/11/p11023.

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Abstract The Cryogenic Underground Observatory for Rare Events (CUORE) is the most sensitive experiment searching for neutrinoless double-beta decay (0νββ) in 130Te. CUORE uses a cryogenic array of 988 TeO2 calorimeters operated at ∼10 mK with a total mass of 741 kg. To further increase the sensitivity, the detector response must be well understood. Here, we present a non-linear thermal model for the CUORE experiment on a detector-by-detector basis. We have examined both equilibrium and dynamic electro-thermal models of detectors by numerically fitting non-linear differential equations to the

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Gariazzo, Stefano, Martina Gerbino, Thejs Brinckmann, et al. "Neutrino mass and mass ordering: no conclusive evidence for normal ordering." Journal of Cosmology and Astroparticle Physics 2022, no. 10 (2022): 010. http://dx.doi.org/10.1088/1475-7516/2022/10/010.

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Abstract The extraction of the neutrino mass ordering is one of the major challenges in particle physics and cosmology, not only for its implications for a fundamental theory of mass generation in nature, but also for its decisive role in the scale of future neutrinoless double beta decay experimental searches. It has been recently claimed that current oscillation, beta decay and cosmological limits on the different observables describing the neutrino mass parameter space provide robust decisive Bayesian evidence in favor of the normal ordering of the neutrino mass spectrum [1]. We further inv

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Benaoum, H. B., and S. H. Shaglel. "TeV-scale resonant leptogenesis with new scaling ansatz on neutrino Dirac mass matrix from A4 flavor symmetry." International Journal of Modern Physics A 35, no. 17 (2020): 2050077. http://dx.doi.org/10.1142/s0217751x20500773.

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We propose a new scaling ansatz in the neutrino Dirac mass matrix to explain the low energy neutrino oscillations data, baryon number asymmetry and neutrinoless double beta decay. In this work, a full reconstruction of the neutrino Dirac mass matrix has been realized from the low energy neutrino oscillations data based on type-I seesaw mechanism. A concrete model based on [Formula: see text] flavor symmetry has been considered to generate such a neutrino Dirac mass matrix and imposes a relation between the two scaling factors. In this model, the right-handed Heavy Majorana neutrino masses are

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28

Ghosh, Gayatri. "Significance of Broken μ − τ Symmetry in Correlating δ CP , θ 13 , Lightest Neutrino Mass, and Neutrinoless Double Beta Decay 0 ν β β". Advances in High Energy Physics 2021 (20 березня 2021): 1–23. http://dx.doi.org/10.1155/2021/9563917.

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Leptonic CP violating phase δ CP in the light neutrino sector and leptogenesis via present matter-antimatter asymmetry of the Universe entails each other. Probing CP violation in light neutrino oscillation is one of the challenging tasks today. The reactor mixing angle θ 13 measured in reactor experiments, LBL, and DUNE with high precision in neutrino experiments indicates towards the vast dimensions of scope to detect δ CP . The correlation between leptonic Dirac CPV phase δ CP , reactor mixing angle θ 13 , lightest neutrino mass m 1 , and matter-antimatter asymmetry of the Universe within th

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Cattadori, Carla Maria, and Francesco Salamida. "GERDA and LEGEND: Probing the Neutrino Nature and Mass at 100 meV and beyond." Universe 7, no. 9 (2021): 314. http://dx.doi.org/10.3390/universe7090314.

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The Gerda (GERmanium Detector Array) project, located at Laboratori Nazionali del Gran Sasso (LNGS), was started in 2005, a few years after the claim of evidence for the neutrinoless double beta decay (0νββ) of 76Ge to the ground state of 76Se: it is an ultra-rare process whose detection would directly establish the Majorana nature of the neutrino and provide a measurement of its mass and mass hierarchy. The aim of Gerda was to confirm or disprove the claim by an increased sensitivity experiment. After establishing the new technology of Ge detectors operated bare in liquid Argon and since 2011

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Damanik, Asan. "Neutrino masses from modified bimaximal mixing." Modern Physics Letters A 30, no. 32 (2015): 1550169. http://dx.doi.org/10.1142/s0217732315501692.

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The bimaximal (BM) neutrino mixing matrix was formulated in order to accommodate the data of the experimental results which indicate that both solar and atmospheric neutrino oscillation in vacuum are near maximal. But, after the T2K and Daya Bay Collaborations reported that the mixing angle [Formula: see text] is nonzero and relatively large, many authors have modified the neutrino mixing matrix in order to accommodate experimental data. We modified the BM mixing matrix by introducing a simple perturbation matrix into BM mixing matrix. The modified BM mixing matrix can proceed the mixing angle

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Liu, Jun-Hao, and Shun Zhou. "Another look at the impact of an eV-mass sterile neutrino on the effective neutrino mass of neutrinoless double-beta decays." International Journal of Modern Physics A 33, no. 02 (2018): 1850014. http://dx.doi.org/10.1142/s0217751x18500148.

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The possible existence of an eV-mass sterile neutrino, slightly mixing with ordinary active neutrinos, is not yet excluded by neutrino oscillation experiments. Assuming neutrinos to be Majorana particles, we explore the impact of such a sterile neutrino on the effective neutrino mass of neutrinoless double-beta decays [Formula: see text], where [Formula: see text] and [Formula: see text] (for [Formula: see text]) denote respectively the absolute masses and the first-row elements of the [Formula: see text] neutrino flavor mixing matrix [Formula: see text], for which a full parametrization invol

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Garfagnini, Alberto. "Neutrinoless double beta decay experiments." International Journal of Modern Physics: Conference Series 31 (January 2014): 1460286. http://dx.doi.org/10.1142/s2010194514602865.

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Neutrinoles double beta decay is the only process known so far able to test the neutrino intrinsic nature: its experimental observation would imply that the lepton number is violated by two units and prove that neutrinos have a Majorana mass components, being their own anti-particle. While several experiments searching for such a rare decay have been performed in the past, a new generation of experiments using different isotopes and techniques have recently released their results or are raking data and will provide new limits, should no signal be observed, in the next few years to come. The pr

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MATSUDA, KOICHI, TATSURU KIKUCHI, TAKESHI FUKUYAMA, and HIROYUKI NISHIURA. "CONSTRAINTS FROM NEUTRINOLESS DOUBLE BETA DECAY." Modern Physics Letters A 17, no. 39 (2002): 2597–603. http://dx.doi.org/10.1142/s0217732302009362.

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We examine the constraints from the recent HEIDELBERG–MOSCOW double beta decay experiment. It leads us to the almost degenerate or inverse hierarchy neutrino mass scenario. In this scenario, we obtain possible upper bounds for the Majorana CP violating phase in the lepton sector by incorporating the data from the neutrino oscillation, the single beta decay experiments, and from the astrophysical observation. We also predict the neutrino mass that may be measurable in the future beta decay experiments.

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KLAPDOR-KLEINGROTHAUS, H. V., A. DIETZ, H. L. HARNEY, and I. V. KRIVOSHEINA. "EVIDENCE FOR NEUTRINOLESS DOUBLE BETA DECAY." Modern Physics Letters A 16, no. 37 (2001): 2409–20. http://dx.doi.org/10.1142/s0217732301005825.

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The data of the Heidelberg–Moscow double beta decay experiment for the measuring period August 1990–May 2000 (54.9813 kg y or 723.44 molyears), published recently, are analyzed using the potential of the Bayesian method for low counting rates. First evidence for neutrinoless double beta decay is observed giving first evidence for lepton number violation. The evidence for this decay mode is 97% (2.2σ) with the Bayesian method, and 99.8% c.l. (3.1σ) with the method recommended by the Particle Data Group. The half-life of the process is found with the Bayesian method to be [Formula: see text] (95

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BILENKY, S. M., and C. GIUNTI. "NEUTRINOLESS DOUBLE-BETA DECAY: A BRIEF REVIEW." Modern Physics Letters A 27, no. 13 (2012): 1230015. http://dx.doi.org/10.1142/s0217732312300157.

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In this brief review we discuss the generation of Majorana neutrino masses through the seesaw mechanism, the theory of neutrinoless double-beta decay, the implications of neutrino oscillation data for the effective Majorana mass, taking into account the recent Daya Bay measurement of ϑ13, and the interpretation of the results of neutrinoless double-beta decay experiments.

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Dell’Oro, Stefano, Simone Marcocci, Matteo Viel, and Francesco Vissani. "Neutrinoless Double Beta Decay: 2015 Review." Advances in High Energy Physics 2016 (2016): 1–37. http://dx.doi.org/10.1155/2016/2162659.

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The discovery of neutrino masses through the observation of oscillations boosted the importance of neutrinoless double beta decay (0νββ). In this paper, we review the main features of this process, underlining its key role from both the experimental and theoretical point of view. In particular, we contextualize the0νββin the panorama of lepton number violating processes, also assessing some possible particle physics mechanisms mediating the process. Since the0νββexistence is correlated with neutrino masses, we also review the state of the art of the theoretical understanding of neutrino masses

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37

Gayatri, Ghosh. "Non-Unitarity in Neutrino mixing matrix and two and three flavored non resonant Leptogenesis from CP violation." Indian Journal of Science and Technology 13, no. 34 (2020): 3572–85. https://doi.org/10.17485/IJST/v13i34.643.

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Abstract <strong>Background/Objectives:</strong> We will study the effects of non-unitarity parameters from existing experimental constraints, on cLFV decays such as, μ →eγ, μ →τγ, τ →eγ, on generation of baryon asymmetry through leptogenesis and neutrino oscillation probabilities. Considering flavor effects in leptogenesis, we do a parameter scan of a minimal seesaw model in a type I Seesaw framework satisfying Planck data on baryon to photon ratio of the Universe, which lies in the interval, 5.8×10<sup>−</sup> <sup>10</sup>

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Vergados, J. D., H. Ejiri, and F. Šimkovic. "Neutrinoless double beta decay and neutrino mass." International Journal of Modern Physics E 25, no. 11 (2016): 1630007. http://dx.doi.org/10.1142/s0218301316300071.

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The observation of neutrinoless double beta decay (DBD) will have important consequences. First it will signal that lepton number is not conserved and the neutrinos are Majorana particles. Second, it represents our best hope for determining the absolute neutrino mass scale at the level of a few tens of meV. To achieve the last goal, however, certain hurdles have to be overcome involving particle, nuclear and experimental physics. Particle physics is important since it provides the mechanisms for neutrinoless DBD. In this review, we emphasize the light neutrino mass mechanism. Nuclear physics i

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AALSETH, C. E., F. T. AVIGNONE, A. BARABASH, et al. "COMMENT ON "EVIDENCE FOR NEUTRINOLESS DOUBLE BETA DECAY"." Modern Physics Letters A 17, no. 22 (2002): 1475–78. http://dx.doi.org/10.1142/s0217732302007715.

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We comment on the recent claim for the experimental observation of neutrinoless double-beta decay. We discuss several limitations in the analysis provided in that paper and conclude that there is no basis for the presented claim.

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Brugnera, R. "Neutrinoless double-beta decay search with the LEGEND experiment." Journal of Instrumentation 20, no. 03 (2025): C03050. https://doi.org/10.1088/1748-0221/20/03/c03050.

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Abstract Neutrinoless double-beta decay is a nuclear decay, given as (A,Z) → (A,Z + 2) +2e -, with deep consequences for the understanding of our universe. A strong experimental program is underway to search for this transition with many proposed experiments using different technologies. In this article the LEGEND experiment, which uses 76Ge as the isotope of interest, will be described. We will discuss both the first stage, LEGEND-200, which is now taking data at the Laboratori Nazionali del Gran Sasso of INFN in Italy, and the future stage, LEGEND-1000. LEGEND-200 has analyzed a first sample

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Agostini, M., A. M. Bakalyarov, M. Balata, et al. "Searching Neutrinoless Double Beta Decay with Gerda Phase II." International Journal of Modern Physics: Conference Series 46 (January 2018): 1860040. http://dx.doi.org/10.1142/s2010194518600406.

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An observation of neutrinoless double beta ([Formula: see text]) decay would allow to shed light onto the nature of neutrinos. Gerda (GERmanium Detector Array) aims to discover this process in a background-free search using [Formula: see text]Ge. The experiment is located at the Laboratori Nazionali del Gran Sasso (LNGS) of the Istituto Nazionale di Fisica Nucleare (INFN) in Italy. Bare, isotopically enriched, high purity germanium detectors are operated in liquid argon. Gerda follows a staged approach. In Phase II 35.6 kg of enriched germanium detectors are operated since December 2015. The a

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Zhang, Jue. "Neutrino mass ordering in future neutrinoless double beta decay experiments." Modern Physics Letters A 31, no. 22 (2016): 1630020. http://dx.doi.org/10.1142/s0217732316300202.

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Motivated by recent intensive experimental efforts on searching for neutrinoless double beta decays, we present a detailed quantitative analysis on the prospect of resolving neutrino mass ordering in the next generation [Formula: see text]Ge-type experiments.

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43

Fritzsch, Harald. "Oscillating Neutrinos and Majorana Neutrino Masses." Universe 6, no. 2 (2020): 29. http://dx.doi.org/10.3390/universe6020029.

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We discuss the mass matrices with texture zeros for the quarks and leptons. The flavor mixing angles for the quarks are functions of the quark masses and can be calculated. The results agree with the experimental data. The texture zero mass matrices for the leptons and the see-saw mechanism are used to derive relations between the matrix elements of the lepton mixing matrix and the ratios of the neutrino masses. Using the measured neutrino mass differences, the neutrino masses can be calculated. The neutrinoless double beta decay is discussed. The effective Majorana neutrino mass, describing t

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Yu, C. H., S. I. Alvis, I. J. Arnquist, et al. "The Majorana Demonstrator Status and Preliminary Results." EPJ Web of Conferences 178 (2018): 01006. http://dx.doi.org/10.1051/epjconf/201817801006.

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The Majorana Collaboration is using an array of high-purity Ge detectors to search for neutrinoless double-beta decay in 76Ge. Searches for neutrinoless double-beta decay are understood to be the only viable experimental method for testing the Majorana nature of the neutrino. Observation of this decay would imply violation of lepton number, that neutrinos are Majorana in nature, and provide information on the neutrino mass. The Majorana Demonstrator comprises 44.1 kg of p-type point-contact Ge detectors (29.7 kg enriched in 76Ge) surrounded by a low-background shield system. The experiment ach

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Soukeras, Vasileios, F. Cappuzzello, D. Carbone, et al. "Recent results in the study of the 20Ne + 130Te collision within the NUMEN project and future perspectives." HNPS Advances in Nuclear Physics 30 (July 31, 2024): 154–59. http://dx.doi.org/10.12681/hnpsanp.6256.

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The NUMEN (Nuclear Matrix Elements for Neutrinoless double beta decay) project aims to investigate specific heavy–ion double charge exchange reactions to provide experimentally data driven information about nuclear matrix elements of interest in the context of neutrinoless double beta decay (0νββ). Taking into consideration that 130Te is a candidate nucleus for double beta decay, the 20Ne + 130Te system was experimentally investigated in a multi-channel approach by measuring the complete net of reaction channels, namely elastic and inelastic scattering, double charge exchange, single charge ex

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SUHONEN, JOUNI, and MARKUS KORTELAINEN. "NUCLEAR MATRIX ELEMENTS FOR DOUBLE BETA DECAY." International Journal of Modern Physics E 17, no. 01 (2008): 1–11. http://dx.doi.org/10.1142/s0218301308009495.

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The neutrinoless double beta (0νββ) decay of atomic nuclei plays a key role in the search for massive Majorana neutrinos and their mass scale. To extract the necessary information from the measured data the nuclear-structure effects have to be accounted for by computation of the associated nuclear matrix elements (NME's). In this article the NME's for the light-neutrino exchange mechanism are discussed. They are computed by using the proton-neutron quasiparticle random-phase approximation (pnQRPA). Recent developments in this field relate to the handling of the nucleon-nucleon short-range corr

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Krause, P. "GERDA: Final Results and Physics Beyond Neutrinoless Double-Beta Decay." Journal of Physics: Conference Series 2156, no. 1 (2021): 012117. http://dx.doi.org/10.1088/1742-6596/2156/1/012117.

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Abstract The GERDA experiment searched for the lepton number violating neutrinoless double-beta 0υββ decay of 76 Ge. Observation of this decay would provide answers to fundamental problems in particle physics and cosmology, including the origin of neutrino masses and baryon asymmetry in the universe. The GERDA experiment achieved the most stringent lower limit on the half-life of the 0υββ decay of 1.8 • 1026 yr at 90% C.L. (which coincides with the sensitivity) by operating high-purity germanium (HPGe) detectors enriched in 76Ge submerged in liquid argon (LAr). The collaboration could achieve

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MACOLINO, CARLA. "RESULTS ON NEUTRINOLESS DOUBLE-BETA DECAY FROM GERDA PHASE I." Modern Physics Letters A 29, no. 01 (2014): 1430001. http://dx.doi.org/10.1142/s0217732314300018.

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The GERmanium Detector Array, GERDA, is designed to search for neutrinoless double-beta (0νββ) decay of 76 Ge and it is installed in the Laboratori Nazionali del Gran Sasso (LNGS) of INFN, Italy. In this review, the detection principle and detector setup of GERDA are described. Also, the main physics results by GERDA Phase I, are discussed. They include the measurement of the half-life of 2νββ decay, the background decomposition of the energy spectrum and the techniques for the discrimination of the background, based on the pulse shape of the signal. In the last part of this review, the estima

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Schmidt, B. "First data from the CUPID-Mo neutrinoless double beta decay experiment." Journal of Physics: Conference Series 1468 (February 2020): 012129. http://dx.doi.org/10.1088/1742-6596/1468/1/012129.

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Campani, Alice, Valentina Dompè, and Guido Fantini. "Status and Perspectives on Rare Decay Searches in Tellurium Isotopes." Universe 7, no. 7 (2021): 212. http://dx.doi.org/10.3390/universe7070212.

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Neutrinoless double beta decay (0νββ) is a posited lepton number violating decay whose search is an increasingly active field in modern astroparticle physics. A discovery would imply neutrinos are Majorana particles and inform neutrino physics, cosmology and beyond-standard-model theories. Among the few nuclei where double beta decay (ββ) is allowed, tellurium isotopes stand for their high natural abundance and are currently employed in multiple experiments. The search for 0νββ will provide large exposure data sets in the coming years, paving the way for unprecedented sensitivities. We review

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