Instanton calculus in R-R background and the topological string

Marco Billó, Marialuisa Frau, Francesco Fucito, Alberto Lerda

Risultato della ricerca: Contributo su rivistaArticolo di reviewpeer review

Abstract

We study a system of fractional D3 and D(-1) branes in a Ramond-Ramond closed string background and show that it describes the gauge instantons of script N sign = 2 super Yang-Mills theory and their interactions with the graviphoton of script N sign = 2 supergravity. In particular, we analyze the instanton moduli space using string theory methods and compute the prepotential of the effective gauge theory exploiting the localization methods of the instanton calculus showing that this leads to the same information given by the topological string. We also comment on the relation between our approach and the so-called Ω-background.

Lingua originaleInglese
Numero di articolo012
RivistaJournal of High Energy Physics
Volume2006
Numero di pubblicazione11
DOI
Stato di pubblicazionePubblicato - 1 nov 2006

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