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Title: Neutrino masses and mixings in a minimal SO (10) model

Abstract

We consider a minimal formulation of SO(10) grand unified theory wherein all the fermion masses arise from Yukawa couplings involving one 126 and one 10 of Higgs multiplets. It has recently been recognized that such theories can explain, via the type-II seesaw mechanism, the large {nu}{sub {mu}}-{nu}{sub {tau}} mixing as a consequence of b-{tau} unification at the grand unified theory scale. In this picture, however, the Cabibbo-Kobayashi-Maskawa quark-mixing matrix phase {delta} lies preferentially in the second quadrant, in contradiction with experimental measurements. We revisit this minimal model and show that the conventional type-I seesaw mechanism generates phenomenologically viable neutrino masses and mixings, while being consistent with Cabibbo-Kobayashi-Maskawa quark-mixing matrix CP violation. We also present improved fits in the type-II seesaw scenario and suggest fully consistent fits in a mixed scenario.

Authors:
 [1];  [1];  [2]
  1. Department of Physics, Oklahoma Center for High Energy Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20774457
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 72; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.72.115003; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CP INVARIANCE; GRAND UNIFIED THEORY; HIGGS BOSONS; HIGGS MODEL; KOBAYASHI-MASKAWA MATRIX; MUON NEUTRINOS; NEUTRINO OSCILLATION; PARTICLE MULTIPLETS; QUARKS; REST MASS; SO-10 GROUPS; TAU NEUTRINOS

Citation Formats

Babu, K.S., Macesanu, C., and Department of Physics, Syracuse University, Syracuse, New York 13244-1130. Neutrino masses and mixings in a minimal SO (10) model. United States: N. p., 2005. Web. doi:10.1103/PhysRevD.72.115003.
Babu, K.S., Macesanu, C., & Department of Physics, Syracuse University, Syracuse, New York 13244-1130. Neutrino masses and mixings in a minimal SO (10) model. United States. doi:10.1103/PhysRevD.72.115003.
Babu, K.S., Macesanu, C., and Department of Physics, Syracuse University, Syracuse, New York 13244-1130. Thu . "Neutrino masses and mixings in a minimal SO (10) model". United States. doi:10.1103/PhysRevD.72.115003.
@article{osti_20774457,
title = {Neutrino masses and mixings in a minimal SO (10) model},
author = {Babu, K.S. and Macesanu, C. and Department of Physics, Syracuse University, Syracuse, New York 13244-1130},
abstractNote = {We consider a minimal formulation of SO(10) grand unified theory wherein all the fermion masses arise from Yukawa couplings involving one 126 and one 10 of Higgs multiplets. It has recently been recognized that such theories can explain, via the type-II seesaw mechanism, the large {nu}{sub {mu}}-{nu}{sub {tau}} mixing as a consequence of b-{tau} unification at the grand unified theory scale. In this picture, however, the Cabibbo-Kobayashi-Maskawa quark-mixing matrix phase {delta} lies preferentially in the second quadrant, in contradiction with experimental measurements. We revisit this minimal model and show that the conventional type-I seesaw mechanism generates phenomenologically viable neutrino masses and mixings, while being consistent with Cabibbo-Kobayashi-Maskawa quark-mixing matrix CP violation. We also present improved fits in the type-II seesaw scenario and suggest fully consistent fits in a mixed scenario.},
doi = {10.1103/PhysRevD.72.115003},
journal = {Physical Review. D, Particles Fields},
number = 11,
volume = 72,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}