Composite models with chiral symmetry

Two model field theories involving scalar and fermion fields with contact interactions are analyzed. The models are solved in the large-N limit. It is shown that chiral symmetry of the Lagrangian is realized in the spectrum. The anomalous magnetic moment of the composite fermions is shown to be m_Fm_B², where m_F and m_B are the masses of the fermionic and bosonic preons, respectively. Finally a semirealistic model which incorporates the known gauge interactions is constructed.