Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-08
Phys.Rev.D83:035002,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
28 pages, 1 figure. Text amended. One reference added. To appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.83.035002
We investigate the conditions on the Higgs sector that allow supersymmetric SO(10) grand unified theories (GUT) to break spontaneously to the standard electroweak model (SM) at the renormalizable level. If one considers Higgs representations of dimension up to the adjoint, a supersymmetric standard model vacuum requires in most cases the presence of non-renormalizable (NR) operators. The active role of Planck induced NR operators in the breaking of the gauge symmetry introduces a hierarchy in the mass spectrum at the GUT scale that may be an issue for gauge unification and proton decay. We show that the minimal Higgs scenario that allows for a renormalizable breaking to the SM is obtained by considering flipped $SO(10) \otimes U(1)$ with one adjoint ($45_H$) and two pairs of $16_H \oplus \bar{16}_H$ Higgs representations. We consider a non-anomalous matter content and discuss the embedding of the model in an $E_6$ grand unified scenario just above the flipped SO(10) scale.
Bertolini Stefano
Luzio Luca Di
Malinsky Michal
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