Unoriented D-brane Instantons vs Heterotic worldsheet Instantons
Massimo Bianchi, Jose F. Morales
TL;DR
This paper explores the relationship between unoriented D-brane instantons and heterotic worldsheet instantons, analyzing their effects on Fermi interactions of hyperini in a dual string theory setup.
Contribution
It provides a detailed comparison of instanton effects in Type I and heterotic string theories, highlighting their equivalence in generating specific Fermi interactions.
Findings
Unoriented D-brane instantons produce Fermi interactions matching heterotic worldsheet instantons.
The duality between Type I and heterotic theories is confirmed through instanton effect analysis.
The results deepen understanding of non-perturbative effects in string dualities.
Abstract
We discuss Fermi interactions of four hyperini generated by ``stringy'' instantons in a Type I / Heterotic dual pair on T^4/Z_2.
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