Comments on orientifolds without vector structure

• Verfasst von: Bachas, Constantin [VerfasserIn]
• Verfasst von: Weigand, Timo [VerfasserIn]
• Titel: Comments on orientifolds without vector structure
• Verf.angabe: Constantin Bachas, Massimo Bianchi, Ralph Blumenhagen, Dieter Lust and Timo Weigand
• Fussnoten: Gesehen am 09.01.2018
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2008
• Band/Heft Quelle: (2008) Artikel-Nummer 0805.3696, 34 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1566960428

Abstract

We revisit type I compactifications with a Spin(32)/Z2 gauge bundle that admits no vector structure. We elucidate the relation of this Z2 obstruction to discrete B-field flux and to 't Hooft flux and clarify some subtleties in the T-duality transformation to type IIA intersecting D-brane models. We reexamine the earliest 3-generation GUT model on magnetized D-branes and show its consistency when a discrete B-flux is switched on. We further generalize partially known results for toroidal models to type I compactifications without vector structure and their mirror dual type IIA orientifolds on genuine Calabi-Yau manifolds. We illustrate this by working out the example of the quintic in some detail.