Global analysis of neutrino masses, mixings, and phases: Entering the era of leptonic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>violation searches

Fogli, G. L.; Lisi, E.; Marrone, A.; Montanino, D.; Palazzo, A.; Rotunno, A. M.

doi:10.1103/physrevd.86.013012

Cited by 615 publications

(959 citation statements)

References 68 publications

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“…Any neutrino motivated extension of the SM must accommodate oscillation data [18][19][20]. In our analysis, we consider both possible (normal and inverted) hierarchies for the light neutrino spectrum and take the current best-fit results on the oscillation parameters as obtained in [18].…”

Section: Constraints From Neutrino Datamentioning

confidence: 99%

Sterile neutrinos in leptonic and semileptonic decays

Abada

Teixeira

Vicente

et al. 2014

J. High Energ. Phys.

113

107

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Abstract:We address the impact of a modified W ℓν coupling on a wide range of observables, such as τ leptonic and mesonic decays, leptonic decays of pseudoscalar mesons, as well as semileptonic meson decays. In particular, we concentrate on deviations from lepton flavour universality, focusing on the ratios, and BR(B → τ ν). We further consider leptonic gauge boson decays, such as W → ℓν and Z → νν. For all the above observables, we provide the corresponding complete analytical expressions, derived for the case of massive neutrinos. Working in the framework of the Standard Model extended by additional sterile fermions, which mix with the active (left-handed) neutrinos, we numerically study the impact of active-sterile mixings on the above mentioned observables.

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Section: Constraints From Neutrino Datamentioning

confidence: 99%

Sterile neutrinos in leptonic and semileptonic decays

Abada

Teixeira

Vicente

et al. 2014

J. High Energ. Phys.

113

107

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“…There is detailed global analysis of three flavor neutrino oscillation data [73] presented at the Neutrino 2012 conference. In their analysis the correlation between various oscillation parameters has been taken into account.…”

Section: Numerical Simulationmentioning

confidence: 99%

The discovery reach ofCPviolation in neutrino oscillation with non-standard interaction effects

Rahman

Dasgupta

Adhikari

2015

J. Phys. G: Nucl. Part. Phys.

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We have studied the CP violation discovery reach in neutrino oscillation experiment with superbeam, neutrino factory and monoenergetic neutrino beam from electron capture process. For NSI satisfying model-dependent bound for shorter baselines (like CERN-Fréjus set-up ) there is insignificant effect of NSI on the the discovery reach of CP violation due to δ. Particularly, for superbeam and neutrino factory we have also considered relatively longer baselines for which there could be significant NSI effects on CP violation discovery reach for higher allowed values of NSI. For monoenergetic beam only shorter baselines are considered to study CP violation with different nuclei as neutrino sources. Interestingly for non-standard interactions -εeµ and εeτ of neutrinos with matter during propagation in longer baselines in superbeam, there is possibility of better discovery reach of CP violation than that with only Standard Model interactions of neutrinos with matter. For complex NSI we have shown the CP violation discovery reach in the plane of Dirac phase δ and NSI phase φij. The CP violation due to some values of δ remain unobservable with present and near future experimental facilities in superbeam and neutrino factory . However, in presence of some ranges of off-diagonal NSI phase values there are some possibilities of discovering total CP violation for any δCP value even at 5σ confidence level for neutrino factory. Our analysis indicates that for some values of NSI phases total CP violation may not be at all observable for any values of δ. Combination of shorter and longer baselines could indicate in some cases the presence of NSI. However, in general for NSIs 1 the CP violation discovery reach is better in neutrino factory set-ups. Using a neutrino beam from electron capture process for nuclei 110 50 Sn and 152 Yb, we have shown the discovery reach of CP violation in neutrino oscillation experiment. Particularly for 110 50 Sn nuclei CP violation could be found for about 51% of the possible δ values for a baseline of 130 km with boost factor γ = 500. The nuclei 152 Yb is although technically more feasible for the production of mono-energetic beam, but is found to be not suitable in obtaining good discovery reach of CP

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“…Firstly, one ensures that the SM extension complies with ν-oscillation data [46][47][48][49][50][51]; in all the scenarios considered in this work, and for both cases of NH and inverted mass hierarchy (IH), we require compatibility with the corresponding best-fit intervals [49] (no constraints being imposed on the yet undetermined value of the CP violating Dirac phase δ). 3 The choice of a larger interval for the complex angles would increase the range of the entries of Y ν , and thus would lead to augmented contributions to the considered cLFV observables; however, this would also increase the other (muonic) cLFV observables which, given the present bounds, would in turn lead to the exclusion of these regimes.…”

Section: Constraints On Sterile Fermionsmentioning

confidence: 99%

Impact of sterile neutrinos on nuclear-assisted cLFV processes

Abada

Romeri

Teixeira

2016

J. High Energ. Phys.

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We discuss charged lepton flavour violating processes occurring in the presence of muonic atoms, such as muon-electron conversion in nuclei CR(µ − e, N), the (Coulomb enhanced) decay of muonic atoms into a pair of electrons BR(µ − e − → e − e − , N), as well as Muonium conversion and decay, Mu − Mu and Mu → e + e − . Any experimental signal of these observables calls for scenarios of physics beyond the Standard Model. In this work, we consider minimal extensions of the Standard Model via the addition of sterile fermions, providing the corresponding complete analytical expressions for all the considered observables. We first consider an "ad hoc" extension with a single sterile fermion state, and investigate its impact on the above observables. Two well motivated mechanisms of neutrino mass generation are then considered: the Inverse Seesaw embedded into the Standard Model, and the νMSM. Our study reveals that, depending on their mass range and on the active-sterile mixing angles, sterile neutrinos can give significant contributions to the above mentioned observables, some of them even lying within present and future sensitivity of dedicated cLFV experiments. We complete the analysis by confronting our results to other (direct and indirect) searches for sterile fermions.

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Global analysis of neutrino masses, mixings, and phases: Entering the era of leptonicCPviolation searches

Cited by 615 publications

References 68 publications

Sterile neutrinos in leptonic and semileptonic decays

Sterile neutrinos in leptonic and semileptonic decays

The discovery reach ofCPviolation in neutrino oscillation with non-standard interaction effects

Impact of sterile neutrinos on nuclear-assisted cLFV processes

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