Symmetry realization of texture zeros

Grimus, Walter; Joshipura, Anjan S.; Lavoura, L.; Tanimoto, Morimitsu

doi:10.1140/epjc/s2004-01896-y

Cited by 196 publications

(258 citation statements)

References 31 publications

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“…As all entries carry different charges (including the trivial), we can arrange the appropriate texture-zero in the (ee) or (µτ ) entry by making the nonzero entries come from the vacuum expectation values of scalars carrying the desired quantum numbers [32]. We give an explicit construction in section 5.…”

Section: Jhep01(2017)068mentioning

confidence: 99%

“…The absence of appropriate fields will lead to texture-zeros [32]. Let us introduce SM singlet scalars η k ∼ ω k 8 labelled by their Z 8 charges, k ≤ 7.…”

Section: Modelmentioning

confidence: 99%

“…The former usually requires abelian symmetries [32] while the latter requires nonabelian discrete symmetries [10,11]. The most general cases of texture-zeros has been analyzed recently in ref.…”

Section: Introductionmentioning

confidence: 99%

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Mu-tau reflection symmetry with a texture-zero

Nishi

Sánchez-Vega

2017

J. High Energ. Phys.

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Abstract:The µτ -reflection symmetry is a simple symmetry capable of predicting all the unknown CP phases of the lepton sector and the atmospheric angle but too simple to predict the absolute neutrino mass scale or the mass ordering. We show that by combining it with a discrete abelian symmetry in a nontrivial way we can additionally enforce a texture-zero and obtain a highly predictive scenario where the lightest neutrino mass is fixed to be in the few meV range for two normal ordering (NO) solutions or in the tens of meV in one inverted ordering (IO) solution. The rate for neutrinoless double beta decay is predicted to be negligible for NO or have effective mass m ββ ≈ 14-29 meV for IO, right in the region to be probed in future experiments.

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Section: Jhep01(2017)068mentioning

confidence: 99%

“…The absence of appropriate fields will lead to texture-zeros [32]. Let us introduce SM singlet scalars η k ∼ ω k 8 labelled by their Z 8 charges, k ≤ 7.…”

Section: Modelmentioning

confidence: 99%

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Mu-tau reflection symmetry with a texture-zero

Nishi

Sánchez-Vega

2017

J. High Energ. Phys.

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“…Apart from being interesting in itself, several scalar triplets naturally occur in models for neutrino masses and lepton mixing based on the type II seesaw mechanism. In particular, it has been shown that in such a scenario a realization of viable neutrino mass matrices with two texture zeros [24][25][26][27][28][29], 1 using symmetry arguments [34], requires two or three scalar triplets [35]. In this paper, we take up the case of two coexisting triplets.…”

Section: Jhep02(2014)060mentioning

confidence: 99%

Doubly charged scalar decays in a type II seesaw scenario with two Higgs triplets

Chaudhuri

Grimus

Mukhopadhyaya

2014

J. High Energ. Phys.

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The type II seesaw mechanism for neutrino mass generation usually makes use of one complex scalar triplet. The collider signature of the doubly-charged scalar, the most striking feature of this scenario, consists mostly in decays into same-sign dileptons or same-sign W boson pairs. However, certain scenarios of neutrino mass generation, such as those imposing texture zeros by a symmetry mechanism, require at least two triplets in order to be consistent with the type II seesaw mechanism. We develop a model with two such complex triplets and show that, in such a case, mixing between the triplets can cause the heavier doubly-charged scalar mass eigenstate to decay into a singly-charged scalar and a W boson of the same sign. Considering a large number of benchmark points with different orders of magnitude of the ∆L = 2 Yukawa couplings, chosen in agreement with the observed neutrino mass and mixing pattern, we demonstrate that H ++ 1 → H + 2 W + can have more than 99% branching fraction in the cases where the vacuum expectation values of the triplets are small. It is also shown that the above decay allows one to differentiate a two-triplet case at the LHC, through the ratios of events in various multi-lepton channels.

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“…Some methods which may be relevant for application to our model include a horizontal gauge symmetry in the singlet sector [44] and the supersymmetric realisation of a singular Majorana mass matrix of Du and Liu [45]. The method advocated in [46] to generate arbitrary mass matrix texture zeros could also be employed.…”

Section: Discussionmentioning

confidence: 99%

3+2neutrino scheme from a singular double seesaw mechanism

McDonald

McKellar²,

Mastrano³

2004

Phys. Rev. D

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We obtain a 3 + 2 neutrino spectrum within a left-right symmetric framework by invoking a singular double see-saw mechanism. Higgs doublets are employed to break SUR(2) and three additional fermions, singlets under the left-right symmetric gauge group, are included. The introduction of a singularity into the singlet fermion Majorana mass matrix results in a light neutrino sector of three neutrinos containing predominantly ναL, α = e, µ, τ , separated from two neutrinos containing a small ναL component. The resulting active-sterile mixing in the 5 × 5 mixing matrix is specified once the mass eigenvalues and the 3 × 3 submatrix corresponding to the PMNS mixing matrix are known.

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Symmetry realization of texture zeros

Cited by 196 publications

References 31 publications

Mu-tau reflection symmetry with a texture-zero

Mu-tau reflection symmetry with a texture-zero

Doubly charged scalar decays in a type II seesaw scenario with two Higgs triplets

3+2neutrino scheme from a singular double seesaw mechanism

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