The minimal type-I seesaw model with maximally-restricted texture zeros

Abstract

In the context of Standard Model (SM) extensions, the seesaw mechanism provides the most natural explanation for the smallness of neutrino masses. In this work we consider the most economical type-I seesaw realization in which two right-handed neutrinos are added to the SM field content. For the sake of predictability, we impose the maximum number of texture zeros in the lepton Yukawa and mass matrices. All possible patterns are analyzed in the light of the most recent neutrino oscillation data, and predictions for leptonic CP violation are presented. We conclude that, in the charged-lepton mass basis, eight different texture combinations are compatible with neutrino data at $1\sigma$, all of them for an inverted-hierarchical neutrino mass spectrum. Four of these cases predict a CP-violating Dirac phase close to $3\pi /2$, which is around the current best-fit value from global analysis of neutrino oscillation data. If one further reduces the number of free parameters by considering three equal elements in the Dirac neutrino Yukawa coupling matrix, several texture combinations are still compatible with data but only at $3\sigma$. For all viable textures, the baryon asymmetry of the Universe is computed in the context of thermal leptogenesis, assuming (mildly) hierarchical heavy Majorana neutrino masses $M_{1,2}$. It is shown that the flavored regime is ruled out, while the unflavored one requires $M_1\sim 10^{14}$ GeV.

arXiv comment17 pages, 8 tables and 9 figures

References in corpus (48)

• Planck 2015 results. XIII. Cosmological parameters
• Oscillating neutrinos and mu --> e, gamma
• Leptogenesis
• Search for Majorana Neutrinos near the Inverted Mass Hierarchy Region with KamLAND-Zen
• Leptogenesis for Pedestrians
• CP violating decays in leptogenesis scenarios
• Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity
• Baryogenesis through leptogenesis
• The importance of flavor in leptogenesis
• Flavour Issues in Leptogenesis
• Cosmological Sign of Neutrino CP Violation
• Flavour Matters in Leptogenesis
• Global constraints on absolute neutrino masses and their ordering
• Neutrino masses and mixings: Status of known and unknown $3\nu$ parameters
• Neutrino Phenomenology -- the case of two right handed neutrinos
• Leptonic CP violation
• Symmetry realization of texture zeros
• Two-zero Textures of the Majorana Neutrino Mass Matrix and Current Experimental Tests
• Leptogenesis in the Universe
• Phenomenology of Two-Texture Zero Neutrino Mass Matrices
• Measurement of the Two-Neutrino Double Beta Decay Half-life of ${}^{130}$Te with the CUORE-0 Experiment
• Radiatively induced leptogenesis in a minimal seesaw model
• A Full Determination of the Neutrino Mass Spectrum from Two-zero Textures of the Neutrino Mass Matrix
• The reactor mixing angle and CP violation with two texture zeros in the light of T2K
• Probing Leptogenesis
• Fine-tuning and naturalness issues in the two-zero neutrino mass textures
• Seesaw Mechanism with Occam's Razor
• Leptogenesis in the two right-handed neutrino model revisited
• CP Violation in the Lepton Sector and Implications for Leptogenesis
• Abelian realization of phenomenological two-zero neutrino textures
• The Majorana Neutrino Mass Matrix with One Texture Zero and One Vanishing Eigenvalue
• Neutrino mass matrices with one texture zero and a vanishing neutrino mass
• Two-parameter neutrino mass matrices with two texture zeros
• Leptogenesis, Yukawa Textures and Weak Basis Invariants
• Near Maximal Atmospheric Neutrino Mixing in Neutrino Mass Models with Two Texture Zeros
• Confronting predictive texture zeros in lepton mass matrices with current data
• Towards the minimal seesaw model via CP violation of neutrinos
• Formulae for flavour neutrino masses and its application to texture two zeros
• Search for neutrinoless double beta decay
• Perturbed Yukawa Textures in the Minimal Seesaw Model
• Neutrino CP violation and sign of baryon asymmetry in the minimal seesaw model
• Search for nucleon decays with EXO-200
• A Comprehensive Renormalisation Group Analysis of the Littlest Seesaw Model
• Radiative leptogenesis in minimal seesaw models
• A Further Study of the Frampton-Glashow-Yanagida Model for Neutrino Masses, Flavor Mixing and Baryon Number Asymmetry
• Seesaw Scale and CP Phases in a Minimal Model of Leptogenesis
• Searching for neutrinoless double beta decay with GERDA
• Texture Zero Neutrino Models and Their Connection with Resonant Leptogenesis

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