Sterile neutrinos in neutrinoless double beta decay

Beneš, P.; Faessler, Amand; Kovalenko, Sergey; Šimkovic, F.

doi:10.1103/physrevd.71.077901

Cited by 108 publications

(123 citation statements)

References 26 publications

(18 reference statements)

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“…We also notice that the non-unitarity of theŨ PMNS (submatrix) is constrained by a number of observations, as discussed in [51,52]. Further constraints on the active-sterile mixings and on the sterile neutrino masses can be inferred from current bounds arising from neutrinoless double beta decays [53]. In the present scenario, the relevant effective neutrino mass is given by [46,54] …”

Section: Constraintsmentioning

confidence: 90%

Electron electric dipole moment in Inverse Seesaw models

Abada

Toma

2016

J. High Energ. Phys.

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Abstract:We consider the contribution of sterile neutrinos to the electric dipole moment of charged leptons in the most minimal realisation of the Inverse Seesaw mechanism, in which the Standard Model is extended by two right-handed neutrinos and two sterile fermion states. Our study shows that the two pairs of (heavy) pseudo-Dirac mass eigenstates can give significant contributions to the electron electric dipole moment, lying close to future experimental sensitivity if their masses are above the electroweak scale. The major contribution comes from two-loop diagrams with pseudo-Dirac neutrino states running in the loops. In our analysis we further discuss the possibility of having a successful leptogenesis in this framework, compatible with a large electron electric dipole moment.

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Section: Constraintsmentioning

confidence: 90%

Electron electric dipole moment in Inverse Seesaw models

Abada

Toma

2016

J. High Energ. Phys.

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“…[23]. Further, the (β − β − ) 0ν decay within the mechanism involving sterile neutrinos has been given by Benes et al [31]. In the following, we present a brief out line of the required theoretical formalism for the clarity in notations used in the present paper.…”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…In Ref. [22], it was shown that the mixing of a light sterile neutrino (mass ≪ 1 eV) with a much heavier sterile neutrino (mass ≫ 1 GeV) would result in observable signals in current ββ decay experiments, as is the case in other interesting alternative scenarios [30,31].…”

Section: Introductionmentioning

confidence: 99%

“…In the same theoretical formalism, the (β − β − ) 0ν decay involving classical Majorons and sterile neutrinos is also studied. The theoretical formalisms to calculate the half-lives of the (β − β − ) 0ν decay with induced currents [35,36], classical Majorons [33,35] and sterile neutrinos [31] have already been reported. Hence, we briefly outline the steps of the above derivations in Sec.…”

Section: Introductionmentioning

confidence: 99%

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Neutrinolessββdecay transition matrix elements within mechanisms involving light Majorana neutrinos, classical Majorons, and sterile neutrinos

et al. 2013

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In the PHFB model, uncertainties in the nuclear transition matrix elements for the neutrinoless double-β decay of 94,96 In the mechanisms involving the light Majorana neutrinos and classical Majorons, the maximum uncertainty is about 15% and in the scenario of sterile neutrinos, it varies in between approximately 4 (9)%-20 (36)% without(with) Jastrow short range correlations with Miller-Spencer parametrization, depending on the considered mass of the sterile neutrinos.

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“…The introduction of singlet neutrinos with Majorana masses allows for new processes like lepton number violating interactions, among which neutrinoless double beta decay remains the most important one [65]. In our analysis, we evaluate the contributions of the sterile states to the effective mass m ee according to [66,67]; strong bounds on the effective mass have been set by several experiments, among them GERDA [68], EXO-200 [69,70], KamLAND-ZEN [71].…”

Section: Jhep02(2016)083mentioning

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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Sterile neutrinos in neutrinoless double beta decay

Cited by 108 publications

References 26 publications

Electron electric dipole moment in Inverse Seesaw models

Electron electric dipole moment in Inverse Seesaw models

Neutrinolessββdecay transition matrix elements within mechanisms involving light Majorana neutrinos, classical Majorons, and sterile neutrinos

Impact of sterile neutrinos on nuclear-assisted cLFV processes

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