Supersymmetric SO(10) simplified

Journal Article · Wed Mar 01 04:00:00 EST 1995 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.51.2463· OSTI ID:6580221

Babu, K S; Barr, S M ^[1]

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1. Bartol Research Institute, University of Delaware, Newark, Delaware 19716 (United States)

In the context of supersymmetric SO(10) grand unified models, it is shown that the gauge symmetry breaking as well as a natural doublet-triplet splitting can be achieved with a minimal Higgs system consisting of a single adjoint and a pair of vector and spinor multiplets. Such a Higgs spectrum has been shown to arise in the free fermionic formulation of superstrings. Since the symmetry-breaking mechanism relies on nonrenormalizable operators, some of the Higgs particles of the model turn out to have masses somewhat below the GUT scale. As a consequence, the unification scale is raised to about 2[times]10[sup 17] GeV and sin[sup 2][theta][sub [ital W]] is predicted to be slightly larger than the minimal SUSY SU(5) value. Including threshold uncertainties, which turn out to be surprisingly small in the model, we show that the sin[sup 2][theta][sub [ital W]] prediction is consistent with experiments.

• DOE Contract Number: FG02-91ER40626
• OSTI ID: 6580221
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 51:5; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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GRAND UNIFIED THEORY
HIGGS BOSONS
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SYMMETRY GROUPS
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