# Heterotic / type I duality and D-brane instantons

Abstract : We study heterotic/type I duality in d=8,9 uncompactified dimensions. We consider the special (BPS saturated'') F^4 and R^4 terms in the effective one-loop heterotic action, which are expected to be non-perturbatively exact. Under the standard duality map these translate to tree-level, perturbative and non-perturbative contributions on the type I side. We check agreement with the one-loop open string calculation, and discuss the higher-order perturbative contributions, which arise because of the mild non-holomorphicities of the heterotic elliptic genus. We put the heterotic world-sheet instanton corrections in a form that can be motivated as arising from a D-brane instanton calculation on the type-I side.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-00003618
Contributor : Vanhove Pierre Connect in order to contact the contributor
Submitted on : Thursday, December 16, 2004 - 3:33:10 PM
Last modification on : Monday, November 15, 2021 - 12:10:03 PM

### Citation

Constantin Bachas, C. Fabre, E. Kiritsis, N. A. Obers, P. Vanhove. Heterotic / type I duality and D-brane instantons. Nuclear Physics B, Elsevier, 2006, ⟨10.1016/S0550-3213(97)00639-1⟩. ⟨hal-00003618⟩

### Metrics

Les métriques sont temporairement indisponibles