Mass scales in grand unified theories
- 1 November 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 26 (9), 2396-2419
- https://doi.org/10.1103/physrevd.26.2396
Abstract
Explicit expressions for the upper and lower bounds for all unification mass scales in allowed breakdowns of SU(5) and SO(10) are reviewed. All breakdown patterns of through maximal subgroups are catalogued and bounds on the mass scales in such chains are derived. In all cases but one, the mass scale characterizing proton decay is at least as large as in SU(5). The dependence of the bounds on is examined and all bounds are found to be members of a single-parameter family whose significance is discussed. A weak- scale parameter is introduced in analogy with the strong scale and the unification masses are found to depend simply on and in a certain approximation.
Keywords
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