Charged lepton corrections to scaling neutrino mixing

Dev, S.; Gautam, Raju; Singh, Lal

doi:10.1103/physrevd.89.013006

Cited by 12 publications

(4 citation statements)

References 98 publications

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“…If the values of θ 23 and δ are not exactly maximal, one has to deviate from the reflection symmetry in some way. Possible corrections from the charged lepton sector are often considered in this regard [22][23][24][25][26][27][28][29][30][31][32]. To employ charged lepton corrections we recall Eq.…”

Section: Charged Lepton Contributionsmentioning

confidence: 99%

Mu-Tau Reflection Symmetry in the Standard Parametrization and Contributions from Charged Lepton Sector

Duarah

2020

Preprint

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The µ − τ reflection symmetry of the lepton mixing matrix accommodates maximal atmospheric mixing (θ 23 = π/4) as well as maximal Dirac CP phase (δ = ±π/2) for the Dirac case. In the standard parametrization of the PMNS matrix the reflection symmetric nature is not directly visible while substituting the maximal values of the mixing parameters. This issue has been addressed in this paper. It is found that the reflection symmetry in the 'standard' PMNS matrix can be restored by allowing maximal values of the Majorana CP phases (α, β) as well, along with maximal δ. With the proposed scheme, the reflection symmetry is realized in the neutrino mixing matrix and the perturbation from charged lepton sector is studied. CKM like contributions are found to be consistent with current oscillation data.

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Section: Charged Lepton Contributionsmentioning

confidence: 99%

Mu-Tau Reflection Symmetry in the Standard Parametrization and Contributions from Charged Lepton Sector

Duarah

2020

Preprint

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“…The Yukawa couplings are undetermined in the gauge theories. To understand the origin of neutrino mass and mixing one way is to employ phenomenological approaches such as texture zeros [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], hybrid textures [24][25][26][27][28], scaling [29][30][31][32][33][34][35][36], vanishing minor [37][38][39] etc. irrespective of details of the underlying theory.…”

Section: Introductionmentioning

confidence: 99%

Highly predictive and testable A4 flavor model within type-I and II seesaw framework and associated phenomenology

2019

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We investigate neutrino mass model based on A4 discrete flavor symmetry in type-I+II seesaw framework. The model has imperative predictions for neutrino masses, mixing and CP violation testable in the current and upcoming neutrino oscillation experiments. The important predictions of the model are: normal hierarchy for neutrino masses, a higher octant for atmospheric angle (θ23 > 45 o ) and near-maximal Dirac-type CP phase (δ ≈ π/2 or 3π/2) at 3σ C. L.. These predictions are in consonance with the latest global-fit and results from Super-Kamiokande(SK), NOνA and T2K. Also, one of the important feature of the model is the existence of a lower bound on effective Majorana mass, |Mee| ≥ 0.047eV(at 3σ) which corresponds to the lower part of the degenerate spectrum and is within the sensitivity reach of the neutrinoless double beta decay(0νββ) experiments.

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“…In the present work we investigate the latter idea considering two ansatzes, (i) zeros in the Yukawa texture, (ii) a scaling property between the nonzero Yukawa matrix elements, referred to as scaling ansatz [1][2][3][4][5][6][7][8][9][10][11] within the framework of a variant of seesaw mechanism known as "linear seesaw" mechanism [12][13][14][15][16]. We do not touch the origin of those two well-studied ansatzes here, however, we bring the two ansatzes together here and investigate systematically the minimal number of parameters necessary * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Scaling ansatz with texture zeros in linear seesaw

2015

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We investigate scaling ansatz with texture zeros within the framework of linear seesaw mechanism. In this variant of seesaw mechanism a simplified expression of effective neutrino mass matrix m ν containing two Dirac type matrices (m D and m DS ) and one Majorana type matrix (m RS ) is obtained by virtue of neglecting the global U (1) L symmetry breaking term in the mass term of the Lagrangian. Along with the charged lepton mass matrix, the matrix m RS , too, is chosen in a diagonal basis whereas a scaling relation is incorporated in m D and m DS with different scale factors. Our goal in this work is to achieve a completely phenomenologically acceptable m ν generated by combinations of m D and m DS containing least number of independent parameters or maximum number of zeros. At the end of the numerical analysis it is found that number of zeros in any of the constituent Dirac type matrices (m D and m DS ) of m ν cannot be greater than six in order to meet the phenomenological requirements. The hierarchy obtained here is normal and also the values of the two parameters sum mass ( m i ) and |m νee | are below the present experimental lower limit.

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Charged lepton corrections to scaling neutrino mixing

Cited by 12 publications

References 98 publications

Mu-Tau Reflection Symmetry in the Standard Parametrization and Contributions from Charged Lepton Sector

Mu-Tau Reflection Symmetry in the Standard Parametrization and Contributions from Charged Lepton Sector

Highly predictive and testable A4 flavor model within type-I and II seesaw framework and associated phenomenology

Scaling ansatz with texture zeros in linear seesaw

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