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On Gauge Couplings in String Theory

Vadim Kaplunovsky·Jan Louis
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Abstract

We investigate the field dependence of the gauge couplings of $N=1$ string vacua from the point of view of the low energy effective quantum field theory. We find that field-theoretical considerations severely constrain the form of the string loop corrections; in particular, the dilaton dependence of the gauge couplings is completely universal at the one-loop level. The moduli dependence of the string threshold corrections is also constrained, and we illustrate the power of such constraints with a detailed discussion of the orbifold vacua and the $(2,2)$ (Calabi-Yau) vacua of the heterotic string.

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Vadim Kaplunovsky, Jan Louis. 1995-02-15. On Gauge Couplings in String Theory. https://doi.org/10.1016/0550-3213(95)00172-o

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