Natural strongCPconservation in flipped physics
- 13 August 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 65 (7) , 820-822
- https://doi.org/10.1103/physrevlett.65.820
Abstract
A natural axion-free solution of the strong CP problem at tree level is noted within an E(6) grand unified theory. Using this as a springboard, it is shown that several flipped SU(5) theories which occur in superstring phenomenology contain within them a mechanism which enforces θ¯=0 at high accuracy.Keywords
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