Leptogenesis from the asymmetric texture

Rahat, Moinul Hossain

doi:10.1103/physrevd.103.035011

Cited by 11 publications

(5 citation statements)

References 125 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Solution to the Boltzmann equation (19) provides us with the dynamics of the RHN production and the B−L number density. From the requirement of producing a lepton asymmetry of the correct order of magnitude, the RHNs have to be numerous before they decay.…”

Section: Boltzmann Equationsmentioning

confidence: 99%

“…Leptogenesis, being a direct consequence of the seesaw models having right-handed neutrinos (RHN) also establishes a connection between the origin of neutrino mass and the BAU. Realization of baryogenesis though leptogenesis via the decay of RHN in various seesaw models can be found in [7,[11][12][13][14][15][16][17][18][19][20][21]. For a recent review one may look at [22][23][24][25] and the references there in.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Leptogenesis in an extended seesaw model with U(1)_B−L symmetry

Dey¹,

Jha²,

Mukherjee³

et al. 2022

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

We have explored an extended seesaw model accommodating a keV sterile neutrino adopting U(1)B-L symmetry. This model provides a natural platform for achieving resonant leptogenesis to account for the observed baryon asymmetry of the Universe. The required lepton asymmetry is sourced by the CP violating decay of the lightest heavy right handed neutrino to Standard Model leptons and Higgs. The presence of the light sterile neutrino in the model brings out an enhancement in the ﬁnal lepton asymmetry through an additional self-energy contribution. Adopting a proper treatment for all the washout processes this framework strictly favours a strong washout regime thereby protecting the low energy neutrino mass parameters in agreement with the present neutrino and cosmology data. This framework of extended seesaw scheme oﬀers the source of matter-antimatter asymmetry without any severe ﬁne tuning of the Yukawa couplings governing the tiny neutrino mass. We also comment on the half-life period for the neutrino less double beta decay process in the background of having a keV sterile neutrino satisfying all the constraints which guide the explanation for the observed baryon asymmetry of the Universe.

show abstract

Section: Boltzmann Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Leptogenesis in an extended seesaw model with U(1)_B−L symmetry

Dey¹,

Jha²,

Mukherjee³

et al. 2022

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

show abstract

“…Leptogenesis is a mechanism by which some lepton-number-violating processes [14][15][16][17] produce lepton asymmetry, which is subsequently converted into baryon asymmetry through the nonperturbative B + L violating but B − L conserving sphaleron processes of the SM [18,19]. Based on the type-I seesaw [15,[20][21][22], numerous frameworks have been proposed (see for instance [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 are several fields of theoretically consistent frameworks that exist in particular, deal with the characteristic features of lepton asymmetry generation at a certain temperature [32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Flavored leptogenesis and Dirac CP violation

Mukherjee

Narendra

2023

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

In this work 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 the role of Dirac CP violation in ﬂavored leptogenesis. In the light of these two choices of the R 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. The above forms of R matrices allow us to choose a nearly degenerate spectrum for the RHN masses. The complex R matrix predicts a maximal Dirac CP violation (δ = π/2) for leptogenesis which, can be veriﬁed by the ongoing and upcoming searches for a precise δ measurement at the neutrino factories. We also discuss the phenomenological implications of these two case studies in the context of LFV considering the µ → eγ decay process, interms of an indirect probe of the R matrix parameter space. We report an upper bound on the lightest neutrino mass ($m_1$) of around 0.015 eV from the baryon asymmetry criteria for normal hierarchy of neutrino masses.

show abstract

“…In the lepton sector, according to the experimental data, the PMNS matrix has large values in its entries which can be explained by the presence of a symmetry behind the neutrino mass matrix. Currently, we can find in the literature elegant proposals (and their respective breaking) as the µ ↔ τ symmetry [7] (see reference therein), µ ↔ τ reflection symmetry [8][9][10][11][12][13], Tri-Bimaximal [14][15][16][17][18][19], Cobimaximal mixing matrices [20][21][22][23][24][25]. Moreover, hierarchical mass matrices as the Fritzsch [26] and the generalized Fritzsch textures [6] also accommodate the PMNS mixing matrix.…”

Section: Introductionmentioning

confidence: 99%

A non-renormalizable neutrino mass model with S3 ⊗ Z2 symmetry

García-Aguilar

Gómez-Izquierdo²

2022

Rev. Mex. Fís.

View full text Add to dashboard Cite

The lepton sector is studied within a flavored non-renormalizable model where the S3 ⊗ Z2 flavor symmetry controls the masses and mixings. In this work, the effective neutrino as well as the charged lepton mass matrices are hierarchical and these have (under a benchmark in the charged sector) a kind of Fritzsch textures that accommodate the mixing angles in good agreement with the last experimental data. The model favors the normal hierarchy, this also predicts consistent values for the CP-violating phase and the |mee| effective Majorana neutrino mass rate. Along with this, the branching ratio for the lepton flavor violation process, µ → eγ, is below the current bound.

show abstract

Leptogenesis from the asymmetric texture

Cited by 11 publications

References 125 publications

Leptogenesis in an extended seesaw model with U(1)_B−L symmetry

Leptogenesis in an extended seesaw model with U(1)_B−L symmetry

Flavored leptogenesis and Dirac CP violation

A non-renormalizable neutrino mass model with S3 ⊗ Z2 symmetry

Contact Info

Product

Resources

About

Leptogenesis from the asymmetric texture

Cited by 11 publications

References 125 publications

Leptogenesis in an extended seesaw model with U(1) B−L symmetry

Leptogenesis in an extended seesaw model with U(1) B−L symmetry

Flavored leptogenesis and Dirac CP violation

A non-renormalizable neutrino mass model with S3 ⊗ Z2 symmetry

Contact Info

Product

Resources

About

Leptogenesis in an extended seesaw model with U(1)_B−L symmetry

Leptogenesis in an extended seesaw model with U(1)_B−L symmetry