Flavour structure, flavour symmetry and supersymmetry

Abstract

We discuss the role played by the horizontal flavour symmetry in supersymmetric theories. In particular, we consider the horizontal symmetry $SU(3{)}_H$ between the three fermion families and show how this concept can help in explaining the fermion mass spectrum and mixing pattern in the context of SUSY GUTs.

Comments: 12 LaTeX pages. Talk presented at the Int. Workshop `30 Years of Supersymmetry', Minneapolis, USA, 13-27 Oct. 2000. To appear in Nucl. Phys. Proc. Suppl