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Title: Type II seesaw dominance in SO(10)

Abstract

Grand unified theories where the neutrino mass is given by type II seesaw have the potential to provide interesting connections between the neutrino and charged fermion sectors. We explore the possibility of having a dominant type II seesaw contribution in supersymmetric SO(10). We show that this can be achieved in the model where symmetry breaking is triggered by 54 and 45 dimensional representations, without the need for additional fields other than those already required to have a realistic charged fermion mass spectrum. Physical consequences, such as the implementation of the Bajc, Senjanovic, and Vissani mechanism, the possibility of the fields responsible for type II seesaw dominance being messengers of supersymmetry breaking, and the realization of baryo and leptogenesis in these theories, are discussed.

Authors:
;  [1];  [2]
  1. Centro de Fisica Fundamental, Universidad de Los Andes, Merida (Venezuela, Bolivarian Republic of)
  2. International Centre for Theoretical Physics, 34100 Trieste (Italy)
Publication Date:
OSTI Identifier:
21432324
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 82; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.82.075014; (c) 2010 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; GRAND UNIFIED THEORY; MASS; MASS SPECTRA; NEUTRINOS; PARTICLE PRODUCTION; SO-10 GROUPS; SUPERSYMMETRY; SYMMETRY BREAKING; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; LEPTONS; LIE GROUPS; MASSLESS PARTICLES; MATHEMATICAL MODELS; PARTICLE MODELS; QUANTUM FIELD THEORY; SO GROUPS; SPECTRA; SYMMETRY; SYMMETRY GROUPS; UNIFIED GAUGE MODELS

Citation Formats

Melfo, Alejandra, Ramirez, Alba, and Senjanovic, Goran. Type II seesaw dominance in SO(10). United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.82.075014.
Melfo, Alejandra, Ramirez, Alba, & Senjanovic, Goran. Type II seesaw dominance in SO(10). United States. doi:10.1103/PHYSREVD.82.075014.
Melfo, Alejandra, Ramirez, Alba, and Senjanovic, Goran. 2010. "Type II seesaw dominance in SO(10)". United States. doi:10.1103/PHYSREVD.82.075014.
@article{osti_21432324,
title = {Type II seesaw dominance in SO(10)},
author = {Melfo, Alejandra and Ramirez, Alba and Senjanovic, Goran},
abstractNote = {Grand unified theories where the neutrino mass is given by type II seesaw have the potential to provide interesting connections between the neutrino and charged fermion sectors. We explore the possibility of having a dominant type II seesaw contribution in supersymmetric SO(10). We show that this can be achieved in the model where symmetry breaking is triggered by 54 and 45 dimensional representations, without the need for additional fields other than those already required to have a realistic charged fermion mass spectrum. Physical consequences, such as the implementation of the Bajc, Senjanovic, and Vissani mechanism, the possibility of the fields responsible for type II seesaw dominance being messengers of supersymmetry breaking, and the realization of baryo and leptogenesis in these theories, are discussed.},
doi = {10.1103/PHYSREVD.82.075014},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 82,
place = {United States},
year = 2010,
month =
}
  • Recently type-II seesaw in a supersymmetricSO(10) framework has been found useful in explaining large solar and atmospheric mixing angles as well as a larger value of {theta}{sub 13} while unifying quark and lepton masses. An important question in these models is whether there exists consistency between coupling unification and type-II seesaw dominance. Scenarios where this consistency can be demonstrated have been given in a SUSY framework. In this paper we give examples where type-II dominance occurs in SO(10) models without supersymmetry but with additional TeV-scale particles and also in models with split-supersymmetry. Grand unification is realized in a two stepmore » process via breaking of SO(10) to SU(5) and then to a TeV-scale standard model supplemented by extra fields and an SU(5) Higgs multiplet 15{sub H} at a scale of about 10{sup 12} GeV to give a type-II seesaw. The predictions for proton lifetime in these models are in the range {tau}{sub p}{sup 0}=2x10{sup 35} yrs. to 6x10{sup 35} yrs. A number of recent numerical fits to GUT-scale fermion masses can be accommodated within this model.« less
  • We carefully analyze the renormalization group equations in the type I+II seesaw scenario in the extended standard model and the minimal supersymmetric standard model. Furthermore, we present analytic formulas of the mixing angles and phases and discuss the renormalization group effect on the different mixing parameters in the type II seesaw scenario. The renormalization group equations of the angles are independent of the Majorana phases. In addition, there is a contribution which is proportional to the mass squared difference for a hierarchical spectrum. This is in contrast to the inverse proportionality to the mass squared difference in the effective fieldmore » theory case.« less
  • We show that in left-right-symmetric models one can have m/sub v//sub e/:m/sub v//sub ..mu../:m/sub v//sub tau/approx. =eV:KeV:MeV without any fine-tuning of parameters. The ..nu../sub ..mu../ and ..nu../sub tau/ decay via Majoron emission with lifetimes short enough to avoid cosmological constraints. The key ingredient of the model is the breaking of D parity, present in SO(10), at a scale much higher than the scale of SU(2)/sub R/ breaking. Using the Fritzsch ansatz for up-quark mass matrices and a diagonal form for the heavy neutrino masses, we predict m/sub t/<53 GeV, 2.3 TeV//sub R//sub =/<10 TeV, and m/sub ..nu..//sub >//sub e//sub =/greatermore » than or equal to0.2 eV.« less
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