SU(5) x Z{sub 13} grand unification model

Journal Article · Sat Dec 01 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.115010· OSTI ID:21023954

Dias, Alex G ^[1]; Franco, Edison T; Pleitez, Vicente ^[2]

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1. Centro de Ciencias Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adelia 166, 09210-170, Santo Andre, SP (Brazil)
2. Instituto de Fisica Teorica, Universidade Estadual Paulista, Rua Pamplona 145, 01405-900, Sao Paulo, SP (Brazil)

We propose an SU(5) grand unified model with an invisible axion and the unification of the three coupling constants which is in agreement with the values, at M{sub Z}, of {alpha}, {alpha}{sub s}, and sin{sup 2}{theta}{sub W}. A discrete, anomalous, Z{sub 13} symmetry implies that the Peccei-Quinn symmetry is an automatic symmetry of the classical Lagrangian protecting, at the same time, the invisible axion against possible semiclassical gravity effects. Although the unification scale is of the order of the Peccei-Quinn scale the proton is stabilized by the fact that in this model the standard model fields form the SU(5) multiplets completed by new exotic fields and, also, because it is protected by the Z{sub 13} symmetry.

• OSTI ID: 21023954
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AXIONS
COUPLING CONSTANTS
GRAVITATION
LAGRANGIAN FUNCTION
MULTIPLETS
PROTONS
SEMICLASSICAL APPROXIMATION
STANDARD MODEL
SU-5 GROUPS
SYMMETRY