World-Sheet Corrections Via D-Instantons

Details World-Sheet Corrections Via D-Instantons World-Sheet Corrections Via D-Instantons

1999-07-07

arxiv.org/abs/hep-th/9907041v1

JHEP 0002:030,2000

Physics

High Energy Physics

High Energy Physics - Theory

19 pp

Scientific paper

10.1088/1126-6708/2000/02/030

We use a D-instanton or physical gauge approach to re-derive the heterotic string worldsheet instanton contribution to the superpotential in Calabi-Yau compactification. We derive an analogous formula for worldsheet instanton corrections to the moduli space metric in heterotic string or Type I compactification on a K3 surface. In addition, we give a global analysis of the phase of the worldsheet path integral of the heterotic string, showing precisely how the B-field must be interpreted.

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