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A note on dimension-5 operators in GUTs and their impact
J CHAKRABORTTY, A RAYCHAUDHURI
Published in ELSEVIER SCIENCE BV
2009
Volume: 673
   
Issue: 1
Pages: 57 - 62
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. © 2009 Elsevier B.V. All rights reserved.
About the journal
JournalData powered by TypesetPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
PublisherData powered by TypesetELSEVIER SCIENCE BV
ISSN0370-2693
Open AccessYes