Phenomenological implications from moduli fields in strings

Abstract

We study some phenomenological consequences of having moduli fields with large vacuum expectation values (v.e.v.). The v.e.vs of the moduli are dynamically determined once supersymmetry is broken in 4D string theories. The study constraints the possible Yukawa interactions and modular weights for matter fields.

Comments: 9 pages (LaTeX), Oxford preprint OUTP-93-34P