Schizophrenic active neutrinos and exotic sterile neutrinos

Machado, A. C. B.; Pleitez, V.

doi:10.1016/j.physletb.2011.02.051

Cited by 21 publications

(42 citation statements)

References 25 publications

(22 reference statements)

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“…Our application of S 3 will be different from those of Ref. [4,5] since we have the three N L,R fields in addition to ν R1,R2,R3 . We will first work out the details of our model for the simpler case of µ − τ sector and show how one can use S 3 symmetry to obtain maximal mixing.…”

Section: Introductionmentioning

confidence: 99%

Dirac or inverse seesaw neutrino masses with B−L gauge symmetry and S3 flavor symmetry

2015

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Many studies have been made on extensions of the standard model with B − L gauge symmetry. The addition of three singlet (right-handed) neutrinos renders it anomaly-free. It has always been assumed that the spontaneous breaking of B − L is accomplished by a singlet scalar field carrying two units of B − L charge. This results in a very natural implementation of the Majorana seesaw mechanism for neutrinos. However, there exists in fact another simple anomaly-free solution which allows Dirac or inverse seesaw neutrino masses. We show for the first time these new possibilities and discuss an application to neutrino mixing with S 3 flavor symmetry.

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Section: Introductionmentioning

confidence: 99%

Dirac or inverse seesaw neutrino masses with B−L gauge symmetry and S3 flavor symmetry

2015

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“…However, the difference between the baryon number and the lepton number symmetry U (1) B−L can be made non-anomalous by adding only the right-handed partners, ν Ri of the SM neutrinos, ν Li . Anomaly cancellation demands one of the two solutions, the lepton number of the right-handed neutrinos to be vector charges: [52][53][54]. Since all the charged fermions in the SM acquire Dirac masses, it is quite natural to expect that ν L and ν R pair up to form four-component Dirac fermion and as a result the neutrinos also receive Dirac masses.…”

Section: Frameworkmentioning

confidence: 99%

Simplest radiative Dirac neutrino mass models

Saad

2019

Nuclear Physics B

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If neutrinos are Dirac particles, their right-handed partners must be present in the theory. Once introduced in the Standard Model (SM), the difference between the baryon number B and the lepton number L can be promoted to a local U (1) B−L symmetry since the corresponding gauge anomalies can be canceled by the right-handed neutrinos. Furthermore, the extremely small neutrino mass can be explained naturally if it is originated from the quantum correction. In this work, we propose simplest models of radiative Dirac neutrino mass using only U (1) B−L symmetry, and without introducing additional fermions and without imposing ad hoc symmetries. In this simple framework, we provide minimal models where Dirac neutrino mass appears at the (i) one-loop, (ii) two-loop and (iii) three-loop. By performing systematic analysis, we show that the minimal one-loop model requires three beyond SM scalar multiplets, whereas minimal two-loop and three-loop models require five. The presented two-loop and three-loop Dirac mass models have not appeared in the literature before. *

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“…1 are used for the allowed regions. 3 For examples of models see for instance [35,43,44]. P i m i ≲ 15 meV.…”

Section: Light Pseudo-dirac Neutrinosmentioning

confidence: 99%

The quest for neutrinoless double beta decay: Pseudo-Dirac, Majorana, and sterile neutrinos

Meroni

Peinado

2014

Phys. Rev. D

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In this paper we analyze the neutrinoless double beta decay predictions in some scenarios with admixture of pseudo-Dirac and Majorana neutrinos in the 3 and 3 þ 1 neutrino frameworks. We found that some of the cases can be falsifiable in near-term and future generation of neutrinoless double beta decay experiments even for the normal neutrino mass hierarchy. In the 3 þ 1 framework we consider the sterile neutrino with a mass of the order of 1 eV. The complementarity between cosmological constraints and the future sensitivity for the next generations of the neutrinoless double beta decay searches is exploited.

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Schizophrenic active neutrinos and exotic sterile neutrinos

Cited by 21 publications

References 25 publications

Dirac or inverse seesaw neutrino masses with B−L gauge symmetry and S3 flavor symmetry

Dirac or inverse seesaw neutrino masses with B−L gauge symmetry and S3 flavor symmetry

Simplest radiative Dirac neutrino mass models

The quest for neutrinoless double beta decay: Pseudo-Dirac, Majorana, and sterile neutrinos

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