SU (5) unification revisited

Amit Giveon*, Lawrence J. Hall, Uri Sarid

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

92 Scopus citations


Model-independent criteria for unification in the SU (5) framework are studied. These are applied to the minimal supersymmetric standard model and to the standard model with a split 45 Higgs representation. Although the former is consistent with SU (5) unification, the superpartner masses can vary over a wide range, and may even all lie well beyond the reach of planned colliders. Adding a split 45 to the standard model can also satisfy the unification criteria, so supersymmetric SU (5) is far from unique. Furthermore, we learn that separate Higgs doublets must couple to the top and bottom quarks in order to give a correct mb/mτ prediction.

Original languageAmerican English
Pages (from-to)138-144
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - 14 Nov 1991
Externally publishedYes

Bibliographical note

Funding Information:
M.K. Gaillard and I. Hinchliffe for useful comments and discussions. This work is supported in part by the US Department of Energy under contract DE-AC03-76SF00098 and in part by the National Science Foundation under grant PHY90-21 139. The work of A.G. is supported in part by a Chaim Weizmann fellowship. L.H. acknowledges support from an NSF PYI award.


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