Predictive neutrino spectrum in minimal SO(10) grand unification
- Bartol Research Institute, University of Delaware, Newark, Delaware 19716 (United States)
- Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)
We show that in minimal SO(10) models where the fermions have Yukawa couplings to only one (complex) 10 and one 126 of Higgs scalars the standard model doublet contained in the 126 receives an induced vacuum expectation value at tree level. In addition to correcting the bad asymptotic mass relations [ital m][sub [ital d]]=[ital m][sub [ital e]] and [ital m][sub [ital s]]=[ital m][sub [mu]], this also leads to a predictive neutrino spectrum. We find that (i) the [nu][sub [ital e]-][nu][sub [mu]] mixing angle lies in the range sin[theta][sub [ital e][mu]]=0--0.3, (ii) sin[theta][sub [ital e][tau]][congruent]3[vert bar][ital V][sub [ital t][ital d]][vert bar][congruent]0.05, (iii) sin[theta][sub [mu][tau]][congruent]3[vert bar][ital V][sub [ital c][ital b]][vert bar]=0.12--0.16, and (iv) [ital m][sub [nu][tau]]/[ital m][sub [nu][mu]][ge]10[sup 3], implying that [nu][sub [mu]-][nu][sub [tau]] oscillations should be accessible to forthcoming experiments.
- DOE Contract Number:
- FG02-91ER40626
- OSTI ID:
- 6382847
- Journal Information:
- Physical Review Letters; (United States), Vol. 70:19; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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GRAND UNIFIED THEORY
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SO-10 GROUPS
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ELEMENTARY PARTICLES
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NEUTRINOS
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