Discriminating Hybrid Textures of Neutrino Mass Matrix in the Light of Latest Neutrino Data and Baryon Asymmetry

2018 ◽  
pp. 665-668
Author(s):  
Rupam Kalita
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Baryon Asymmetry ◽  
Neutrino Mass Matrix

scholarly journals Hybrid textures of neutrino mass matrix under the lamppost of latest neutrino and cosmology data

2016 ◽  
Vol 31 (06) ◽  
pp. 1650008 ◽  
Author(s):  
Rupam Kalita ◽  
Debasish Borah
Keyword(s):  
Neutrino Mass ◽  
Parameter Space ◽  
Mass Formula ◽  
Mass Matrix ◽  
Zero Element ◽  
Baryon Asymmetry ◽  
Double Beta Decay ◽  
Neutrino Mass Matrix ◽  
Type I ◽  
Mass Matrices

In this paper, we study all possible neutrino mass matrices with one zero element and two equal nonzero elements, known as hybrid texture neutrino mass matrices. In the diagonal charged lepton basis, we consider 39 such possible cases which are consistent with the latest neutrino data. Using the two constraints on neutrino mass matrix elements imposed by hybrid textures, we numerically evaluate the neutrino parameters like the lightest neutrino mass [Formula: see text], one Dirac CP phase [Formula: see text] and two Majorana CP phases [Formula: see text], [Formula: see text] by using the global fit [Formula: see text] values of three mixing angles and two mass squared differences. We then constrain this parameter space by using the cosmological upper bound on the sum of absolute neutrino masses given by Planck experiment. We also calculate the effective neutrino mass [Formula: see text] for this region of parameter space which can have relevance in future neutrinoless double beta decay experiments. We finally discriminate between these hybrid texture mass matrices from the requirement of producing correct baryon asymmetry through type I seesaw leptogenesis. We also constrain the light neutrino parameter space as well as the lightest right-handed neutrino mass from the constraint on baryon asymmetry of the Universe from Planck experiment.

Leptogenesis in quasi-degenerate neutrino mass models with non-zero θ13

2018 ◽  
Vol 96 (1) ◽  
pp. 71-80
Author(s):  
M. Bora ◽  
S. Roy ◽  
N. Nimai Singh
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Mass ◽  
Mass Matrix ◽  
Baryon Asymmetry ◽  
Neutrino Mass Matrix ◽  
Dirac Neutrino ◽  
Significant Difference ◽  
Down Quark ◽  
Degenerate Neutrino ◽  
Neutrino Mass Models

In the context of neutrino oscillation experiments, six different quasi-degenerate neutrino (QDN) mass models, which we parameterized recently, are found equally relevant. The present attempt tries to explore the possibilities for the discrimination of the six QDN models in the light of baryogenesis via leptogenesis. In this work we investigate all six models to predict observable baryon asymmetry. If leptogenesis is unflavoured or single flavoured, a significant difference is found. Then, only QD-NH-IA and QD-IH-IA are dominant. To get specific results, the choice of Dirac neutrino mass matrix as down-quark type is found most favourable.

scholarly journals LEPTOGENESIS IN A HYBRID TEXTURE NEUTRINO MASS MODEL

2010 ◽  
Vol 25 (33) ◽  
pp. 2837-2848 ◽  
Author(s):  
S. DEV ◽  
SURENDER VERMA
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Baryon Asymmetry ◽  
Neutrino Mass Matrix ◽  
Type I ◽  
Mass Model ◽  
Family Symmetry ◽  
Cp Asymmetry ◽  
Seesaw Mechanism ◽  
The Universe

We investigate the CP asymmetry for a hybrid texture of the neutrino mass matrix predicted by Q8 family symmetry in the context of the type-I seesaw mechanism and examine its consequences for leptogenesis. We, also, calculate the resulting Baryon Asymmetry of the Universe (BAU) for this texture.

scholarly journals Renormalization group evolution induced leptogenesis in the minimal seesaw model with the trimaximal mixing and mu-tau reflection symmetry

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Zhen-hua Zhao
Keyword(s):  
Renormalization Group ◽  
Neutrino Mass ◽  
Mass Matrix ◽  
Baryon Asymmetry ◽  
Neutrino Mass Matrix ◽  
Reflection Symmetry ◽  
Normal Case ◽  
Seesaw Model ◽  
Group Evolution ◽  
Evolution Effect

Abstract In this paper, we consider the imbedding of the popular and well-motivated trimaximal mixing and μ–τ reflection symmetry (which can help us shape the forms of the neutrino mass matrix) in the minimal seesaw model (which contains much fewer parameters than the general seesaw model) with two TeV-scale right-handed neutrinos (for realizing a low-scale seesaw) of nearly degenerate masses (for realizing a resonant leptogenesis). However, either for the trimaximal mixing scenario (which is realized through the Form Dominance approach here) or for the μ–τ reflection symmetry scenario, leptogenesis cannot proceed. To address this issue, we consider the possibility that the special forms of the neutrino mass matrix for the trimaximal mixing and μ–τ reflection symmetry are slightly broken by the renormalization group evolution effect, thus allowing leptogenesis to proceed. It is found that in the normal case of the neutrino mass ordering, the baryon asymmetry thus generated can reproduce the observed value. For completeness, we have also extended our analysis to the scenario that two right-handed neutrinos are not nearly degenerate any more. Unfortunately, in this scenario the final baryon asymmetry is smaller than the observed value by several orders of magnitude.

scholarly journals LEPTOGENESIS IN MODELS WITH MULTI-HIGGS BOSONS

2002 ◽  
Vol 17 (26) ◽  
pp. 1725-1734 ◽  
Author(s):  
TAKESHI FUKUYAMA ◽  
NOBUCHIKA OKADA
Keyword(s):  
Matrix Models ◽  
Neutrino Mass ◽  
Mass Matrix ◽  
Baryon Asymmetry ◽  
Neutrino Mass Matrix ◽  
Higgs Bosons ◽  
Effective Dimension ◽  
Lepton Asymmetry ◽  
The One

We study the leptogenesis scenario in models with multi-Higgs doublets. It is pointed out that the washing-out process through the effective dimension-five interactions, which has not been taken into account seriously in the conventional scenario, can be effective, and the resultant baryon asymmetry can be exponentially suppressed. This fact implies new possible scenario where the observed baryon asymmetry is the remnant of the washed out lepton asymmetry which was originally much larger than the one in the conventional scenario. Our new scenario is applicable to some neutrino mass matrix models which predict too large CP-violating parameter and makes them viable through the washing-out process.

scholarly journals Two Higgs singlets \(A_4\) Flavor Symmetry with Minimal Breaking

2014 ◽  
Vol 24 (2) ◽  
pp. 113 ◽  
Author(s):  
Nguyen Thanh Phong
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Baryon Asymmetry ◽  
Neutrino Mass Matrix ◽  
Flavor Symmetry ◽  
Mixing Angle ◽  
Mixing Angles ◽  
The Universe

We study the seesaw realization of a \(A_4\)model with two Higgs singlets. In this model, the mixing angle \(\theta_{13}\) and leptogenesis are zero if the components of right handed neutrino mass matrix resulting from the two Higgs singlets are exact degenerate. We then study the minimal breaking of the model by a tiny shift between aforementioned components. This minimal breaking results in deviations of lepton mixing angles from their tri-bimaximal mixing values in which the current experimental value of \(\theta_{13}\) can be achieved. Besides, the baryon asymmetry of the Universe is successfully generated through non-zero leptogenesis by the decay of right handed neutrinos.

scholarly journals NONZERO θ13 FROM THE TRIANGULAR ANSATZ AND LEPTOGENESIS

2012 ◽  
Vol 27 (26) ◽  
pp. 1250151 ◽  
Author(s):  
H. B. BENAOUM
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Baryon Asymmetry ◽  
Neutrino Mass Matrix ◽  
Type I ◽  
Seesaw Mechanism ◽  
Dimensionless Parameters ◽  
Dirac Neutrino ◽  
The Universe

Recent experiments indicate a departure from the exact tri-bimaximal mixing by measure ring definitive nonzero value of θ13. Within the framework of type I seesaw mechanism, we reconstruct the triangular Dirac neutrino mass matrix from the μ - τ symmetric mass matrix. The deviation from μ - τ symmetry is then parametrized by adding dimensionless parameters yi in the triangular mass matrix. In this parametrization of the neutrino mass matrix, the nonzero value θ13 is controlled by Δy = y4 - y6. We also calculate the resulting leptogenesis and show that the triangular texture can generate the observed baryon asymmetry in the universe via leptogenesis scenario.

Texture zeros of neutrino mass matrix with seesaw mechanism and leptogenesis

2014 ◽  
Vol 29 (08) ◽  
pp. 1450038 ◽  
Author(s):  
T. Phong Nguyen
Keyword(s):  
Neutrino Mass ◽  
High Energy Physics ◽  
Mass Matrix ◽  
High Energy ◽  
Baryon Asymmetry ◽  
Neutrino Mass Matrix ◽  
Lepton Asymmetry ◽  
Seesaw Mechanism ◽  
Current Observation ◽  
Charge Parity

We study the seesaw realization of seven textures of the neutrino mass matrix with two zeros, which were presented by Frampton, Glashow and Marfatia. It is found that once the Dirac neutrino mass matrix is fixed, only texture A2 out of the seven textures is realized by the seesaw with three different heavy Majorana right-handed neutrino (RHN) mass matrices. As a consequence of the seesaw mechanism, the out of equilibrium decay of the lightest RHN generates a lepton number asymmetry. By the leptogenesis process, this lepton asymmetry is converted to the Baryon Asymmetry of the Universe (BAU). By a proper choice of the parameter space of the model which satisfied the low energy experimental data, the BAU is successfully explained by both flavor dependent and flavor independent leptogenesis of the model. It is also shown that the predictions of Dirac charge parity (CP) violation phase, δ CP , for some fixed parameters of high energy physics can be constrained by the current observation of baryon asymmetry.

scholarly journals Embedding the texture of the neutrino mass matrix into the MaVaNs scenario

2006 ◽  
Vol 2006 (01) ◽  
pp. 042-042 ◽  
Author(s):  
Mizue Honda ◽  
Ryo Takahashi ◽  
Morimitsu Tanimoto
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Neutrino Mass Matrix

scholarly journals Broken S3 symmetry in the neutrino mass matrix

2011 ◽  
Vol 702 (1) ◽  
pp. 28-33 ◽  
Author(s):  
S. Dev ◽  
Shivani Gupta ◽  
Radha Raman Gautam
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Neutrino Mass Matrix
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