Leptogenesis from the Asymmetric Texture

Rahat, Moinul Hossain

doi:10.48550/arxiv.2008.04204

Cited by 3 publications

(3 citation statements)

References 37 publications

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“…A generic way is to invoke some assumptions or parametrizations of the lepton Yukawa structures, as widely considered in Refs. [35][36][37][38][39][40][41][42][43][44][45]. However, the corresponding BAU selection criterion would then crucially depend on the assumptions and parametrizations, or even be irrelevant to the Dirac CP-violating phase [46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Next-to-tribimaximal mixing against CP violation and baryon asymmetry signs

Li,

Yan,

Zhang

2022

Preprint

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Four next-to-tribimaximal (NTBM) mixing patterns are widely considered as the feasible candidates for the observed leptonic mixing structure. With the recent measurements from T2K, as well as intensive global fits, the interval of sin δCP > 0 for the Dirac CP-violating phase is persistently small in the normal ordering while no room for sin δCP > 0 exists in the inverted ordering. We show that, the sign of leptonic CP violation can rule out half of the regions allowed by the three mixing angles, and in the survived regions, all the four NTBM patterns cannot reproduce the current data within 1σ uncertainty. Moreover, given the small sin δCP > 0 interval, we find that a unique NTBM pattern can be selected out of the four candidates within 3σ uncertainty, when exposed to a Yukawa texture-independent leptogenesis for the baryon asymmetry of the Universe.

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Section: Introductionmentioning

confidence: 99%

Next-to-tribimaximal mixing against CP violation and baryon asymmetry signs

Li,

Yan,

Zhang

2022

Preprint

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“…Based on the type-I seesaw [15,[20][21][22] there has been proposed numerous frameworks (see for instance Ref. [23][24][25][26][27][28][29][30][31]) which are motivated by the studies of neutrino mass and a possible explanation for the BAU through the process of leptogenesis. Based on the temperature regime at which leptogenesis is supposed to take place, there exist several field theoretically consistent frameworks which in particular deal with the characteristic features of lepton asymmetry generation at a certain temperature [32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Realizing flavored leptogenesis: a reappraisal through special kinds of orthogonal matrices

Mukherjee¹,

Narendra²

2021

Preprint

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The parameterisation proposed by Casas and Ibarra in the year 2001 have shown promising role in the extraction of neutrino Yukawa coupling which is a basic ingredient of the seesaw mechanism generating neutrino mass. We pay special attention in establishing the crucial role of the Casas-Ibarra (CI) parameterisation in presence of two different orthogonal matrices, R = O e iA and R = O e A in order to investigate flavored leptogenesis. In the light of these two choices of the orthogonal matrix we examine the connection between the low energy and high energy CP violations along with certain interesting predictions on the low energy parameters namely, the lightest neutrino mass and the Dirac CP phase (δ). Considering the right handed neutrino (RHN) mass window to be 10 8 GeV, we show that Dirac phase leptogenesis is possible with the choices of these two orthogonal matrices. We choose a nearly degenerate spectrum for the RHN masses for having a successful leptogenesis. We also emphasize on presenting a range of the matrix elements of the skew symmetric matrix A. The results obtained in the present analysis underline the importance of understanding the status of CP violation in the low energy sector. We also discuss the phenomenological implications of these two case studies in the context of LFV considering the µ → eγ decay process.

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“…In the lepton sector, according to the experimental data, the PMNS matrix [8,9] has large values in its entries which can be understood by the presence of a symmetry behind the neutrino mass matrix. Currently, we can find different elegant proposals (and their respective breaking) as the µ ↔ τ symmetry [10][11][12][13][14][15][16][17], µ ↔ τ reflection symmetry [18][19][20][21][22][23][24][25], Tri-Bimaximal [26][27][28][29][30][31],…”

Section: Introductionmentioning

confidence: 99%

A non-renormalizable neutrino mass model with $\mathbf{S}_{3}\otimes \mathbf{Z}_{2}$ symmetry

García-Aguilar,

Gómez-Izquierdo

2021

Preprint

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The lepton sector is studied within a flavored non-renormalizable model where the S3 ⊗ Z2 flavor symmetry drives the Yukawa couplings. In this framework, the effective neutrino mass, that comes from the type II see-saw mechanism, as well as the charged lepton mass matrices are hierarchical and possessed (under a benchmark in the charged sector) a kind of Fritzsch textures that achieve to accommodate the mixing angles in good agreement with the last experimental data. The model predicts a CP-violating phase consistent with the experimental data and the branching ratio for the lepton flavor violation process, µ → eγ, is well below the current bound.

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Leptogenesis from the Asymmetric Texture

Cited by 3 publications

References 37 publications

Next-to-tribimaximal mixing against CP violation and baryon asymmetry signs

Next-to-tribimaximal mixing against CP violation and baryon asymmetry signs

Realizing flavored leptogenesis: a reappraisal through special kinds of orthogonal matrices

A non-renormalizable neutrino mass model with $\mathbf{S}_{3}\otimes \mathbf{Z}_{2}$ symmetry

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