%0 Journal Article
%T Selection Rules for Nonrenormalizable Couplings in Superstring Theories
%A T. Kobayashi
%J Physics
%D 1995
%I arXiv
%R 10.1016/0370-2693(95)00643-Y
%X We study nonrenormalizable coupling terms in $Z_N$ orbifold models. Nontrivial selection rules of couplings are provided and cannot be understood in terms of a simple symmetry of effective field theories. We also discuss phenomenological implications of theses selection rules for the quark mass matrices.
%U http://arxiv.org/abs/hep-ph/9504371v1