scholarly journals Inelastic fermion dark matter origin of XENON1T excess with muon (g − 2) and light neutrino mass

2020 ◽  
Vol 811 ◽  
pp. 135933 ◽  
Author(s):  
Debasish Borah ◽  
Satyabrata Mahapatra ◽  
Dibyendu Nanda ◽  
Narendra Sahu
Keyword(s):  
Dark Matter ◽  
Neutrino Mass ◽  
Light Neutrino ◽  
Light Neutrino Mass

scholarly journals Leptogenesis in supersymmetry with one L violating coupling

2021 ◽  
Vol 81 (7) ◽  
Author(s):  
Rathin Adhikari ◽  
Arnab Dasgupta
Keyword(s):  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Neutrino Mass ◽  
Feynman Diagram ◽  
Light Neutrino ◽  
Majorana Phase ◽  
Light Neutrino Mass

AbstractWe have shown a new scenario of successful leptogenesis with one L violating coupling and a relative Majorana phase playing the role of CP violation. This is in contrast to the usual consideration of Feynman diagram with at least two L violating couplings. We have considered R-parity violating minimal supersymmetric standard model (MSSM) for leptogenesis at TeV scale. This scenario is also consistent with generating light neutrino mass if asymmetry is generated through semileptonic $$\lambda ^{\prime }$$ λ ′ coupling.

scholarly journals Neutrino mass matrices from two zero 3 × 2 Yukawa textures and minimal d = 5 entries

2016 ◽  
Vol 31 (13) ◽  
pp. 1650077 ◽  
Author(s):  
Avtandil Achelashvili ◽  
Zurab Tavartkiladze
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Neutrino Mass Matrix ◽  
Light Neutrino ◽  
Tree Level ◽  
Cp Asymmetry ◽  
Mass Matrices ◽  
Light Neutrino Mass ◽  
Texture Zero ◽  
Predictive Relations

Aiming to relate leptonic CP violating phase [Formula: see text] to the cosmological CP asymmetry, we study the extension of MSSM by two quasi-degenerate (strictly degenerate at tree level) right-handed neutrinos and consider all possible two texture zero [Formula: see text] Yukawa matrices plus one [Formula: see text] dimension five [Formula: see text] operator contributing to the light neutrino mass matrix. We classify all experimentally viable mass matrices, leading to several predictions, and analytically derive predictive relations. We also relate the CP violating [Formula: see text] phase to the CP phase of the thermal leptogenesis.

scholarly journals Light neutrino mass spectrum with one or two right-handed singlet fermions added

2016 ◽  
Vol 273-275 ◽  
pp. 2687-2689 ◽  
Author(s):  
Darius Jurčiukonis ◽  
Thomas Gajdosik ◽  
Andrius Juodagalvis
Keyword(s):  
Mass Spectrum ◽  
Neutrino Mass ◽  
Light Neutrino ◽  
Light Neutrino Mass ◽  
Neutrino Mass Spectrum

scholarly journals New Possibilities of Hybrid Texture of Neutrino Mass Matrix

2018 ◽  
Vol 2018 ◽  
pp. 1-24
Author(s):  
Madan Singh
Keyword(s):  
Numerical Analysis ◽  
Neutrino Mass ◽  
Experimental Test ◽  
Confidence Level ◽  
Mass Matrix ◽  
Neutrino Mass Matrix ◽  
Light Neutrino ◽  
The Novel ◽  
Light Neutrino Mass

We investigate the novel possibilities of hybrid textures comprising a vanishing minor (or element) and two equal elements (or cofactors) in light neutrino mass matrix Mν. Such type of texture structures leads to sixty phenomenological cases each, out of which only fifty-six are viable with texture containing a vanishing minor and an equality between the elements in Mν, while fifty are found to be viable with texture containing a vanishing element and an equality of cofactors in Mν under the current experimental test at 3σ confidence level. Detailed numerical analysis of all the possible cases has been presented.

scholarly journals Radiative seesaw corrections and charged-lepton decays in a model with soft flavour violation

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
E. H. Aeikens ◽  
P. M. Ferreira ◽  
W. Grimus ◽  
D. Jurčiukonis ◽  
L. Lavoura
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Branching Ratios ◽  
Neutrino Mass Matrix ◽  
Light Neutrino ◽  
Radiative Corrections ◽  
Light Neutrino Mass ◽  
Flavour Violation ◽  
The One ◽  
Lepton Flavour

Abstract We consider the one-loop radiative corrections to the light-neutrino mass matrix and their consequences for the predicted branching ratios of the five lepton-flavour-violating decays $$ {\mathrm{\ell}}_1^{-}\to {\mathrm{\ell}}_2^{-}{\mathrm{\ell}}_3^{+}{\mathrm{\ell}}_3^{-} $$ ℓ 1 − → ℓ 2 − ℓ 3 + ℓ 3 − in a two-Higgs-doublet model furnished with the type-I seesaw mechanism and soft lepton-flavour violation. We find that the radiative corrections are very significant; they may alter the predicted branching ratios by several orders of magnitude and, in particular, they may help explain why BR (μ− → e−e+e−) is strongly suppressed relative to the branching ratios of the decays of the τ−. We conclude that, in any serious numerical assessment of the predictions of this model, it is absolutely necessary to take into account the one-loop radiative corrections to the light-neutrino mass matrix.

scholarly journals Quasi-Dirac neutrinos in the linear seesaw model

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Carolina Arbeláez ◽  
Claudio Dib ◽  
Kevin Monsálvez-Pozo ◽  
Iván Schmidt
Keyword(s):  
Neutrino Mass ◽  
Upper Bound ◽  
Opposite Sign ◽  
Mass Splitting ◽  
Light Neutrino ◽  
Experimental Measurements ◽  
Neutrino Masses ◽  
Seesaw Model ◽  
Light Neutrino Mass ◽  
Displaced Vertex

Abstract We implement a minimal linear seesaw model (LSM) for addressing the Quasi-Dirac (QD) behaviour of heavy neutrinos, focusing on the mass regime of MN ≲ MW. Here we show that for relatively low neutrino masses, covering the few GeV range, the same-sign to opposite-sign dilepton ratio, Rℓℓ, can be anywhere between 0 and 1, thus signaling a Quasi-Dirac regime. Particular values of Rℓℓ are controlled by the width of the QD neutrino and its mass splitting, the latter being equal to the light-neutrino mass mν in the LSM scenario. The current upper bound on mν1 together with the projected sensitivities of current and future |UN ℓ|2 experimental measurements, set stringent constraints on our low-scale QD mass regime. Some experimental prospects of testing the model by LHC displaced vertex searches are also discussed.

scholarly journals Dark matter as the origin of neutrino mass in the inverse seesaw mechanism

2021 ◽  
pp. 136609
Author(s):  
Sanjoy Mandal ◽  
Nicolás Rojas ◽  
Rahul Srivastava ◽  
José W.F. Valle
Keyword(s):  
Dark Matter ◽  
Neutrino Mass ◽  
Seesaw Mechanism
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