Neutrinos and Structure of the Intermediate Mass Scale

Abstract

Neutrino data lead via the see-saw mechanism to masses of the right handed neutrinos at the intermediate mass scale. Simple formalism is suggested which incorporates the quark - lepton symmetry and allows one to find properties of the intermediate scale (masses and mixing) from neutrino data. Averaged mass scale and the mass hierarchy parameter are introduced and fixed by the data. They determine natural ranges of masses and mixing at the intermediate scale. In particular, scenario which includes the MSW solution of the solar neutrino problem and tau neutrino as the hot component of Dark Matter of the Universe leads to $M_2=(2-4)\cdot 10^{10}$ GeV and $M_3=(4-8)\cdot 10^{12}$ GeV in agreement with the linear mass hierarchy. Strong deviations from the natural ranges imply fine tuning of parameters or/and certain symmetry of the Majorana mass matrix of the right handed neutrinos.

19 pages, LaTeX, no figures

References in corpus (11)

• Cold + Hot Dark Matter Cosmology with $m({\nu }_{\mu })\approx m({\nu }_{\tau })\approx 2.4$ ev
• Boron neutrino flux and the MSW solution of the solar neutrino problem
• Neutrino Masses and $b-\tau$ unification in the Supersymmetric Standard Model
• Neutrino Masses from Gauge Symmetries
• Upper bound on Hot Dark Matter Density from $SO(10)$ Yukawa Unification
• See-saw Enhancement of Neutrino Mixing due to the Right-handed Phases
• New Approach for the Construction of Fermion Mass Matrices in SO(10) SUSY GUTS
• Predicting the neutrino-spectrum in SUSY-SO(10)
• A Predictive SO(10) Scheme for Fermion Masses and Mixings
• Construction of Fermion Mass Matrices Yielding Two Popular Neutrino Scenarios
• Neutrino properties from maximally-predictive GUT models and the structure of the heavy Majorana sector

Cited by in corpus (16)

• Do experiments suggest a hierarchy problem?
• Neutrino Mass Spectrum with ${\nu }_{\mu }$ $\to$ ${\nu }_s$ Oscillations of Atmospheric Neutrinos
• Large Solar Angle and Seesaw Mechanism: a Bottom-up Perspective
• Discrete Flavor Symmetry, Dynamical Mass Textures, and Grand Unification
• Seesaw mechanism and structure of neutrino mass matrix
• Signatures of Non-Universal Soft Breaking Sfermion Masses at Hadron Colliders
• Seesaw mechanism, quark-lepton symmetry and Majorana phases
• Low-energy formulas for neutrino masses with $\tan \beta$-dependent hierarchy
• Mass Hierarchies and the Seesaw Neutrino Mixing
• Heavy neutrino mass scale and quark-lepton symmetry
• Solar neutrinos and grand unification
• Seesaw model and its Lorentz group formulation
• Low-energy constraints from unification of matter multiplets
• Right-handed neutrino mass and bottom-tau ratio in strong coupling unification
• Neutrino masses and mixings in a seesaw framework
• Phenomenological analysis of properties of the RH Majorana neutrino in the seesaw mechanism