Motivated by the recent HERA events which are consistent with a possible leptoquark interpretation, we discuss the prospects for including additional light colour triplets and anti-triplets in the spectrum of supersymmetric unified theories. We focus on a particular string-inspired Pati-Salam model, and propose a simple mechanism by which a light colour triplet of charge -1/(3) plus anti-triplet of charge 1/(3), may have a mass of order 200 GeV, with one of the new states having leptoquark couplings and with proton decay suppressed. We also discuss possible scenarios for gauge unification in such a model.
Physics Letters B
- Pub Date:
- February 1997
- High Energy Physics - Phenomenology
- 14 pages, latex, 2 eps figs included. Note change of title in this shortened version to appear in Phys.Lett.B