Stringy instantons and dualities

✍ Scribed by M. Frau

• Book ID: 105357916
• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 190 KB
• Volume: 59
• Category: Article
• ISSN: 0015-8208
• DOI: 10.1002/prop.201100022

✦ Synopsis

Abstract

We discuss non‐perturbative corrections to the gauge kinetic functions in a four‐dimensional 𝒩 = 2 gauge theory realized with a system of D7/D3‐branes in a compactification of type I^′^ theory on 𝒯~4~ℤ~2~ × ℤ~2~. The non‐perturbative contributions arise when D(–1) branes, corresponding to stringy instantons, are added to the system; such contributions can be explicitly evaluated using localization techniques and precisely match the results predicted by the heterotic/type I^′^ duality. This agreement represents a very non‐trivial test of the stringy multi‐instanton calculus.