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SO(10) and the invisible axion

Journal Article · · Phys. Rev. D; (United States)
We study the Dine, Fischler, and Srednicki mechanism for solving the strong CP problem in the context of the SO(10) unified gauge theory. We find that this mechanism can be implemented in a minimally extended SO(10) model, where the SO(10) symmetry breaks down to SU(3) x SU(2) x U(1) via SU(5). The resulting theory is consistent with the standard hot-big-bang cosmology and with present phenomenology. We also show that, in other minimally extended SO(10) models, where SO(10) breaks down to SU(3) x SU(2) x U(1) either directly or via SU(4) x SU(2) x SU(2), the Dine, Fischler, and Srednicki mechanism cannot be implemented.
Research Organization:
The Rockefeller University, New York, New York 10021
DOE Contract Number:
AC02-81ER40033
OSTI ID:
5193427
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 25:9; ISSN PRVDA
Country of Publication:
United States
Language:
English