title: Abelian gauge symmetries and fluxed instantons in compactifications of type IIB and F-theory
creator: Kerstan, Max Bromo Buenaventura
subject: ddc-530
subject: 530 Physics
description: We discuss the role of Abelian gauge symmetries in type IIB orientifold compactifications and their F-theory uplift. Particular emphasis is placed on U(1)s which become massive through the geometric St¨uckelberg mechanism in type IIB. We  present a proposal on how to take such geometrically massive U(1)s and the associated fluxes into account in the Kaluza-Klein reduction of F-theory with the help of non-harmonic forms. Evidence for this proposal is obtained by working out the F-theory effective action including such non-harmonic forms and matching the results with the known type IIB expressions. We furthermore discuss how world-volume fluxes on D3-brane instantons affect the instanton charge with respect to U(1) gauge symmetries and the chiral zero mode spectrum. The classical partition function of M5-instantons in F-theory is discussed and compared with  the type IIB results for D3-brane instantons. The type IIB match allows us to determine the correct M5 partition function. Selection rules for the absence of chiral charged zero modes on M5-instantons in backgrounds with G4 flux are discussed and compared with the type IIB results. The dimensional reduction of the democratic formulation of M-theory is presented in the appendix.
date: 2013
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/15668/1/Dissertation_Max_Kerstan.pdf
identifier: DOI:10.11588/heidok.00015668
identifier: urn:nbn:de:bsz:16-heidok-156687
identifier:   Kerstan, Max Bromo Buenaventura  (2013) Abelian gauge symmetries and fluxed instantons in compactifications of type IIB and F-theory.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/15668/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng