<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Q</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math>flavor symmetry model for the extension of the minimal standard model by three right-handed sterile neutrinos

Araki, Takeshi; Li, Yu-Feng

doi:10.1103/physrevd.85.065016

Cited by 60 publications

(43 citation statements)

References 74 publications

(22 reference statements)

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“…Explicitly, for the former and the Higgs sector respectively, the first and second family have been put together in a flavor doublet 2, and the third family is a singlet 1 S (2 ⊕ 1 S ); this choice predicts hierarchical quark mass matrices which may be put into two mass textures (generalized Fritzsch mass textures) fashion that fit the CKM matrix very well as can be found in [34,48,68]. On the contrary, for the leptonic sector, the first family is a singlet 1 S and the second and third families are put in a doublet 2 (1 S ⊕ 2); this assignation is a natural way to get the μ-τ symmetry [63,[80][81][82][83]. Remarkably, the NOνA collaboration is testing the μ-τ symmetry and some results have been released [2].…”

Section: Flavored Left-right Symmetric Modelmentioning

confidence: 77%

Non-minimal flavored $${S}_{3}\otimes {Z}_{2}$$ S 3 ⊗ Z 2 left–right symmetric model

Gómez-Izquierdo

2017

Eur. Phys. J. C

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We propose a non-minimal left-right symmetric model with parity symmetry where the fermion mixings arise as a result of imposing an S 3 ⊗ Z 2 flavor symmetry, and an extra Z e 2 symmetry is considered in the lepton sector. Then the neutrino mass matrix possesses approximately the μ-τ symmetry. The breaking of the μ-τ symmetry induces sizable non-zero θ 13 , and the deviation of θ 23 from 45 • is strongly controlled by an free parameter and the neutrino masses. So, an analytic study of the CP parities in the neutrino masses is carried out to constrain the parameter and the lightest neutrino mass that accommodate the mixing angles. The results are: (a) the normal hierarchy is ruled out for any values of the Majorana phases; (b) for the inverted hierarchy the values of the reactor and atmospheric angles are compatible up to 2, 3 σ C.L.; (c) the degenerate ordering is the most favorable such that the reactor and atmospheric angle are compatible with the experimental data for a large set of values of the free parameters. The model predicts defined regions for the effective neutrino mass, the neutrino mass scale and the sum of the neutrino masses for the favored cases. Therefore, this model may be testable by the future experiments.

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Section: Flavored Left-right Symmetric Modelmentioning

confidence: 77%

Non-minimal flavored $${S}_{3}\otimes {Z}_{2}$$ S 3 ⊗ Z 2 left–right symmetric model

Gómez-Izquierdo

2017

Eur. Phys. J. C

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“…[67,159]. There are several scenarios that predict eigenvalues of M M at or below the electroweak scale, including the inverse seesaw [237] and linear seesaw [238], the νMSM [239,240], low-scale seesaw (e.g. [220][221][222]), or Coleman-Weinberg type models [216], see also section 6.…”

Section: The Seesaw Mechanismmentioning

confidence: 99%

“…Q 6 includes µ − τ symmetry as subgroup, and one can exploit it to derive the observed large atmospheric and small reactor mixing angles [240].…”

Section: Q 6 Symmetry (Author: T Araki)mentioning

confidence: 99%

A White Paper on keV sterile neutrino Dark Matter

Adhikari

Agostini

et al. 2017

J. Cosmol. Astropart. Phys.

372

316

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Abstract. We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved -cosmology, astrophysics, nuclear, and particle physics -in each case viewed from both theoretical and experimental/observational perspectives. After reviewing the role of active neutrinos in particle physics, astrophysics, and cosmology, we focus on sterile neutrinos in the context of the Dark Matter puzzle. Here, we first review the physics motivation for sterile neutrino Dark Matter, based on challenges and tensions in purely cold Dark Matter scenarios. We then round out the discussion by critically summarizing all known constraints on sterile neutrino Dark Matter arising from astrophysical observations, laboratory experiments, and theoretical considerations. In this context, we provide a balanced discourse on the possibly positive signal from X-ray observations. Another focus of the paper concerns the construction of particle physics models, aiming to explain how sterile neutrinos of keV-scale masses could arise in concrete settings beyond the Standard Model of elementary particle physics. The paper ends with an extensive review of current and future astrophysical and laboratory searches, highlighting new ideas and their experimental challenges, as well as future perspectives for the discovery of sterile neutrinos.

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“…Known examples include a non-standard L e − L µ − L τ lepton number [44][45][46] or a Q 6 symmetry [47], which both force the lightest sterile neutrino to be exactly massless in the symmetry limit but generate a small non-zero mass once the symmetry is broken. Alternatively, a certain mechanism could be used to suppress masses and mixings at the same time, and proposals include the use of the Froggatt-Nielsen mechanism [48] to explain light sterile neutrinos [49] as well as the use of exponential suppressions arising from extra spatial dimensions [50,51].…”

Section: Jhep07(2014)039mentioning

confidence: 99%

Common origin of reactor and sterile neutrino mixing

Merle

Morisi

Winter

2014

J. High Energ. Phys.

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If the hints for light sterile neutrinos from short-baseline anomalies are to be taken seriously, global fits indicate active-sterile mixings of a magnitude comparable to the known reactor mixing. We therefore study the conditions under which the active-sterile and reactor mixings could have the same origin in an underlying flavour model. As a starting point, we use µ − τ symmetry in the active neutrino sector, which (for three neutrinos) yields a zero reactor neutrino angle and a maximal atmospheric one. We demonstrate that adding one sterile neutrino can change this setting, so that the active-sterile mixing and non-zero θ 13 can be generated simultaneously. From the phenomenological perspective, electron (anti)neutrino disappearance can be easily accommodated, while muon neutrino disappearance can vanish. Even the LSND results can be reconciled if the Majorana phases have very specific values. From the theory perspective, the setting requires the misalignment of some of the flavon vacuum expectation values, which may be achieved in an A 4 or D 4 flavour symmetry model using extra dimensions.

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Q6flavor symmetry model for the extension of the minimal standard model by three right-handed sterile neutrinos

Abstract: and MINOS results. Furthermore, the tiny active-sterile mixing is related to the mass ratio between the lightest active and lightest sterile neutrinos. * araki@ihep.ac.cn † liyufeng@ihep.ac.cn

Cited by 60 publications

References 74 publications

Non-minimal flavored $${S}_{3}\otimes {Z}_{2}$$ S 3 ⊗ Z 2 left–right symmetric model

Non-minimal flavored $${S}_{3}\otimes {Z}_{2}$$ S 3 ⊗ Z 2 left–right symmetric model

A White Paper on keV sterile neutrino Dark Matter

Common origin of reactor and sterile neutrino mixing

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