| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10724417 | Physics Letters B | 2009 | 6 Pages |
Abstract
Quantum gravity or string compactification can lead to effective dimension-5 operators in Grand Unified Theories which modify the gauge kinetic terms. We exhaustively discuss the group-theoretic nature of such operators for the popular SU(5), SO(10), and E(6) models. In particular, for SU(5) only a Higgs in the 200 representation can help bring the couplings to unification below the Planck scale and in consistency with proton decay limits while for a supersymmetric version 24, 75, or 200 representations are all acceptable. The results also have a direct application in non-universality of gaugino masses in a class of supersymmetric models where identical group-theoretic features obtain.
Related Topics
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Authors
Joydeep Chakrabortty, Amitava Raychaudhuri,