Superstring Threshold Corrections to Yukawa Couplings

Details Superstring Threshold Corrections to Yukawa Couplings Superstring Threshold Corrections to Yukawa Couplings

1992-12-07

arxiv.org/abs/hep-th/9212045v1

Nucl.Phys.B407:706-724,1993

Physics

High Energy Physics

High Energy Physics - Theory

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

Scientific paper

10.1016/0550-3213(93)90095-7

A general method of computing string corrections to the K\"ahler 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.

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