(Non-)BPS bound states and D-brane instantons

• Verfasst von: Cvetič, Mirjam [VerfasserIn]
• Verfasst von: Richter, Robert [VerfasserIn]
• Verfasst von: Weigand, Timo [VerfasserIn]
• Titel: (Non-)BPS bound states and D-brane instantons
• Verf.angabe: Mirjam Cvetič, Robert Richter and Timo Weigand
• Fussnoten: Gesehen am 09.01.2018
• Titel Quelle: Enthalten in: Journal of high energy physics
• Jahr Quelle: 2008
• Band/Heft Quelle: (2008,07) Artikel-Nummer 12, 34 Seiten
• ISSN Quelle: 1029-8479
• DOI: doi:10.1088/1126-6708/2008/07/012
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1566962706

Abstract

We study non-perturbative effects in four-dimensional ##IMG## [http://ej.iop.org/icons/Entities/calN.gif] Script N = 1 supersymmetric orientifold compactifications due to D-brane instantons which are not invariant under the orientifold projection. We show that they can yield superpotential contributions via a multi-instanton process at threshold. Some constituents of this configuration form bound states away from the wall of marginal stability which can decay in other regions of moduli space. A microscopic analysis reveals how contributions to the superpotential are possible when new BPS states compensate for their decay. We study this concretely for D2-brane instantons along decaying special Lagrangians in Type IIA and for D5-branes instantons carrying holomorphic bundles in Type I theory.