Chiral Fermions from Compactification of O(32) and E(8) ⊗ E(8) String Theories
- 18 March 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 54 (11) , 1114-1117
- https://doi.org/10.1103/physrevlett.54.1114
Abstract
Compactification to four dimensions of a low-energy approximation to ten-dimensional O(32) string theory leads only to grand unified theories with trivial replication of families. The E(8) ⊗ E(8) string is more promising and leads in four dimensions to SU(8) with six families. If compactification breaks the symmetry to lower-rank groups, e.g., SU(7) or E(6), there may be any number of families. In the SU(8) and SU(7) models there is nontrivial family symmetry.Keywords
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