Gauge and Gravitational Couplings from Modular Orbits in Orbifold Compactifications

Abstract

We discuss the appearance of modular functions at the one-loop gauge and gravitational couplings in (0,2) non-decomposable N=1 four dimensional orbifold compactifications of the heterotic string. We define the limits for the existence of states causing singularities in the moduli space in the perturbative regime for a generic vacuum of the heterotic string. The "proof" provides evidence for the explanation of the stringy Higgs effect.

17 pages, LaTex

References in corpus (2)

• Non-Simply-Connected Gauge Groups and Rational Points on Elliptic Curves
• The Master Equation for the Prepotential-Pub

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