Superstring Threshold Corrections to Yukawa Couplings

Abstract

A general method of computing string corrections to the Kähler metric and Yukawa couplings is developed at the one-loop level for a general compactification of the heterotic superstring theory. It also provides a direct determination of the so-called Green-Schwarz term. The matter metric has an infrared divergent part which reproduces the field-theoretical anomalous dimensions, and a moduli-dependent part which gives rise to threshold corrections in the physical Yukawa couplings. Explicit expressions are derived for symmetric orbifold compactifications.

26 pages, LATEX NUB-3057 -- IC/92/402 -- CPTH-A185.0892

References in corpus (2)

• Duality Anomaly Cancellation, Minimal String Unification and the Effective Low-Energy Lagrangian of 4-D Strings
• Moduli Corrections to Gauge and Gravitational Couplings in four dimensional Superstrings

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