Status and prospects of searches for neutrinoless double beta decay

Schwingenheuer, B.

doi:10.1002/andp.201200222

Cited by 84 publications

(79 citation statements)

References 84 publications

(116 reference statements)

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“…(5), G is the (calculable) phase space and M is the nuclear matrix element (NME) for a candidate nucleus [15,[50][51][52]. A worldwide search is underway to find possible 0νββ decay signatures in a variety of nuclei, and lower limits on the corresponding half lives have been placed [53][54][55]. Transforming lower bounds on T into upper bounds on m ββ requires theoretical input on the NME and their uncertainties [15,[50][51][52][56][57][58].…”

Section: B Neutrinoless Double Beta Decaymentioning

confidence: 99%

“…9 (dominated by cosmology). There are good prospects to further probe this region -and possibly go below it-with upcoming or planned 0νββ experiments [53][54][55]. However, unlike Σ, there is no finite lower bound on m ββ , since the null value cannot be excluded a priori for unfavorable Majorana phases (see [102] and refs.…”

Section: Combined Constraints In the (σ M ββ ) Planementioning

confidence: 99%

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Global constraints on absolute neutrino masses and their ordering

et al. 2017

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Within the standard three-neutrino framework, the absolute neutrino masses and their ordering (either normal, NO, or inverted, IO) are currently unknown. However, the combination of current data coming from oscillation experiments, neutrinoless double beta (0νββ) decay searches, and cosmological surveys, can provide interesting constraints for such unknowns in the sub-eV mass range, down to O(10 −1 ) eV in some cases. We discuss current limits on absolute neutrino mass observables by performing a global data analysis, that includes the latest results from oscillation experiments, 0νββ decay bounds from the KamLAND-Zen experiment, and constraints from representative combinations of Planck measurements and other cosmological data sets. In general, NO appears to be somewhat favored with respect to IO at the level of ∼ 2σ, mainly by neutrino oscillation data (especially atmospheric), corroborated by cosmological data in some cases. Detailed constraints are obtained via the χ 2 method, by expanding the parameter space either around separate minima in NO and IO, or around the absolute minimum in any ordering. Implications for upcoming oscillation and non-oscillation neutrino experiments, including β-decay searches, are also discussed.

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Section: B Neutrinoless Double Beta Decaymentioning

confidence: 99%

Section: Combined Constraints In the (σ M ββ ) Planementioning

confidence: 99%

Global constraints on absolute neutrino masses and their ordering

et al. 2017

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“…We are particularly interested to determine accurately the conditions for which |m ββ | 0.01 eV, which may be probed experimentally in the near future (see refs. [36][37][38][39][40][41]), and the conditions for which there can be a cancellation of the different mass contributions to |m ββ |, which leads to an unfortunate uncertainty for the possibility of ever observing neutrinoless double-beta decay (unless it is induced by new interactions and/or the exchange of new particles; see refs. [42][43][44][45][46][47][48][49]).…”

Section: Jhep07(2015)171mentioning

confidence: 99%

“…At least a part of the second region is accessible to the next generation of neutrinoless double-beta decay experiments (see refs. [36][37][38][39][40][41]). The only β-decay experiment under preparation with the aim of exploring the sub-eV region of m β is KATRIN [98], which will have a sensitivity of about 0.2 eV that is not sufficient to explore the upper part of the region in figure 15 allowed only in the case of 3+1 mixing.…”

Section: Jhep07(2015)171mentioning

confidence: 99%

Predictions for neutrinoless double-beta decay in the 3+1 sterile neutrino scenario

Giunti

Zavanin

2015

J. High Energ. Phys.

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We present accurate predictions of the effective Majorana mass |m ββ | in neutrinoless double-β decay in the standard case of 3ν mixing and in the case of 3+1 neutrino mixing indicated by the reactor, Gallium and LSND anomalies. We have taken into account the uncertainties of the neutrino mixing parameters determined by oscillation experiments. It is shown that the predictions for |m ββ | in the cases of 3ν and 3+1 mixing are quite different, in agreement with previous discussions in the literature, and that future measurements of neutrinoless double-β decay and of the effective light neutrino mass in β decay or the total mass of the three lightest neutrinos in cosmological experiments may distinguish the 3ν and 3+1 cases if the mass ordering is determined by oscillation experiments. We also present a relatively simple method to determine the minimum value of |m ββ | in the general case of N -neutrino mixing.

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“…This is, however, in conflict with the most stringent upper limit on the sum of light neutrino masses, i m i < 0.23 eV at 95% confidence level (CL), obtained from Planck data [7]. Hence, any evidence of a positive signal in the upcoming 0νββ experiments [8], 1 could indicate a new physics contribution to this rare LNV process.…”

Section: Introductionmentioning

confidence: 91%

TeV-scale left-right symmetry and large mixing effects in neutrinoless double beta decay

2015

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We analyze various contributions to neutrinoless double beta decay (0νββ) in a TeV-scale Left-Right Symmetric Model (LRSM) for type-I seesaw dominance. We find that the momentum-dependent effects due to W L − W R exchange (λ-diagram) and W L − W R mixing (η-diagram) could give dominant contributions to the 0νββ amplitude in a wide range of the LRSM parameter space. In particular, for a relatively large W L − W R mixing, the η-contribution by itself could saturate the current experimental limit on the 0νββ half-life, thereby providing stringent constraints on the relevant LRSM parameters, complementary to the indirect constraints derived from lepton flavor violating observables. In a simplified scenario parametrized by a single light-heavy neutrino mixing, the inclusion of the λ and η contributions leads to significantly improved 0νββ constraints on the light-heavy neutrino mixing as well as on the W L − W R mixing parameters. We also present a concrete TeV-scale LRSM setup, where the mixing effects are manifestly enhanced, and discuss the interplay between 0νββ, lepton flavor violation and electric dipole moment constraints.

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Status and prospects of searches for neutrinoless double beta decay

Cited by 84 publications

References 84 publications

Global constraints on absolute neutrino masses and their ordering

Global constraints on absolute neutrino masses and their ordering

Predictions for neutrinoless double-beta decay in the 3+1 sterile neutrino scenario

TeV-scale left-right symmetry and large mixing effects in neutrinoless double beta decay

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