Branes vs. GUTS: challenges for string inspired phenomenology

Abstract

This paper studies the compatibility of having a grand unification scheme for particle physics, while at the same time having a perturbative string theory description of such a scheme on a D-brane. This is studied in a model independent approach and finds a negative result. Some additional observations related to model building on branes are made.

4 pages, latex. v2: Improved discussion on impossibility on some Yukawa couplings and references added. v3:reference added

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