One loop corrections to coupling constants in String Effective Field Theory

Details One loop corrections to coupling constants in String Effective Field Theory One loop corrections to coupling constants in String Effective Field Theory

1996-05-02

arxiv.org/abs/hep-th/9605012v1

Physics

High Energy Physics

High Energy Physics - Theory

Plain TeX, 19pp

Scientific paper

In the framework of a recently proposed method for computing exactly string amplitudes regularized in the infra-red, I determine the one-loop correlators for auxiliary fields in the symmetric $Z_2\times Z_2$ orbifold model. The $D$-field correlation function turns out to give the one-loop corrections for the gauge couplings, which amounts to a string-theory supersymmetry Ward identity. The two-point function for uncharged $F$ fields leads to the one-loop renormalization of the moduli K\"ahler metric, and eventually to the corrections for the Yukawa couplings.

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