Latest Results from NEMO-3 &amp; Status of the SuperNEMO Experiment

Waters, D.; Nemo,; Collaborations, SuperNEMO

doi:10.1088/1742-6596/888/1/012033

Cited by 13 publications

(12 citation statements)

References 4 publications

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“…Tracking devices have also been used in the various stages of the NEMO experiment (up to NEMO-3) and is planed for an upgrade to SUPERNEMO [715]. MOON, which is an extension of ELEGANT V, aims at a ton-scale DBD experiment with 100 Mo by using super-modules of multi-layer scintillators and tracking chambers [159,716].…”

Section: Neutrinoless Double-beta-decay Experimentsmentioning

confidence: 99%

“…All relevant isotopes have a Q-value uncertainty of less than 1 keV. The half-life limits are taken from [701] for 76 Ge, from [729] for 82 Se, from [715] for 100 Mo, 150 Nd, from [714] for 116 Cd, from [705] for 130 Te, from [709] for 136 Xe, and for others from reviews [18,23,730,731] and those in Sec. 1 and Sec.…”

Section: Neutrinoless Double-beta-decay Experimentsmentioning

confidence: 99%

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Neutrino–nuclear responses for astro-neutrinos, single beta decays and double beta decays

2019

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Neutrino-nuclear responses associated with astro-neutrinos, single beta decays and double beta decays are crucial in studies of neutrino properties of interest for astro-particle physics. The present report reviews briefly recent studies of the neutrino-nuclear responses from both experimental and theoretical points of view in order to obtain a consistent understanding of the many facets of the neutrino-nuclear responses. Subjects discussed in this review include (i) experimental studies of neutrino-nuclear responses by means of single beta decays, charge-exchange nuclear reactions, muon-photon-and neutrino-nuclear reactions, and nucleon-transfer reactions, (ii) implications of and discussions on neutrino-nuclear responses for single beta decays, for astroneutrinos, and for astro-neutrino nucleosynthesis, (iii) theoretical aspects of neutrino-nuclear responses for beta and double beta decays, for nuclear muon capture and for neutrino-nucleus scattering, and (iv) critical discussions on nucleonic and non-nucleonic spin-isospin correlations and renormalization (quenching or enhancement) effects on the axial weak coupling. Remarks are given on perspectives of experimental and theoretical studies of the neutrino-nuclear responses and on future experiments of double beta decays.

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Section: Neutrinoless Double-beta-decay Experimentsmentioning

confidence: 99%

Section: Neutrinoless Double-beta-decay Experimentsmentioning

confidence: 99%

Neutrino–nuclear responses for astro-neutrinos, single beta decays and double beta decays

2019

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“…We study scenarios involving multiple couplings in section 8. We apply the following experimental limits [7,12,13,86] In table 6 we show bounds on m ββ and the low-energy dimension-six, -seven, and -nine operators of eq. (3.4), which were derived using the NMEs of refs.…”

Section: Single-coupling Constraintsmentioning

confidence: 99%

Neutrinoless double beta decay in chiral effective field theory: lepton number violation at dimension seven

Cirigliano

Dekens

Vries

et al. 2017

J. High Energ. Phys.

112

156

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We analyze neutrinoless double beta decay (0νββ) within the framework of the Standard Model Effective Field Theory. Apart from the dimension-five Weinberg operator, the first contributions appear at dimension seven. We classify the operators and evolve them to the electroweak scale, where we match them to effective dimension-six, -seven, and -nine operators. In the next step, after renormalization group evolution to the QCD scale, we construct the chiral Lagrangian arising from these operators. We develop a power-counting scheme and derive the two-nucleon 0νββ currents up to leading order in the power counting for each lepton-number-violating operator. We argue that the leadingorder contribution to the decay rate depends on a relatively small number of nuclear matrix elements. We test our power counting by comparing nuclear matrix elements obtained by various methods and by different groups. We find that the power counting works well for nuclear matrix elements calculated from a specific method, while, as in the case of light Majorana neutrino exchange, the overall magnitude of the matrix elements can differ by factors of two to three between methods. We calculate the constraints that can be set on dimension-seven lepton-number-violating operators from 0νββ experiments and study the interplay between dimension-five and -seven operators, discussing how dimension-seven contributions affect the interpretation of 0νββ in terms of the effective Majorana mass m ββ .

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“…[9][10][11][12][13][14][15] The future experiments include Majorana, SuperNEMO, MOON, AMoRE, LUMINEU, CUPID, SNO+, NEXT, and PandaX-III. [16][17][18][19][20][21][22][23][24] Some of these secondorder processes compete with extremely retarded first-order processes, namely β decays in the 48 Ca − 48 Sc − 48 Ti system 25,26 and in the 96 Zr − 96 Nb − 96 Mo system. 27,28 Many of the listed experiments are based on liquid scintillators which have light nuclei as cosmogenic backgrounds.…”

Section: Introductionmentioning

confidence: 99%

Beta-spectrum shapes of forbidden β decays

Kostensalo

Suhonen

2018

Int. J. Mod. Phys. A

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The neutrinoless ββ decay of atomic nuclei continues to attract fervent interest due to its potential to confirm the possible Majorana nature of the neutrino, and thus the nonconservation of the lepton number. At the same time the direct dark-matter experiments are looking for WIMPs (weakly interacting massive particles) through their scattering on nuclei. The neutrino-oscillation experiments on reactor antineutrinos base their analyses on speculations of β-spectrum shapes of nuclear decays, thus leading to the notorious "reactor antineutrino anomaly". In all these experimental efforts one encounters the problem of β-spectrum shapes of forbidden β decays, either as unwanted backgrounds or unknown components in the analyses of data. In this work the problem of spectrum shapes is discussed and illustrated with a set of selected examples. The relation of the β-spectrum shapes to the problem of the effective value of the weak axial-vector coupling strength g A and the enhancement of the axial-charge matrix element is also pointed out.

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Latest Results from NEMO-3 & Status of the SuperNEMO Experiment

Cited by 13 publications

References 4 publications

Neutrino–nuclear responses for astro-neutrinos, single beta decays and double beta decays

Neutrino–nuclear responses for astro-neutrinos, single beta decays and double beta decays

Neutrinoless double beta decay in chiral effective field theory: lepton number violation at dimension seven

Beta-spectrum shapes of forbidden β decays

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