Flux interactions on D-branes and instantons

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dc.creatorBillo', Marco
dc.creatorFerro, Livia
dc.creatorFrau, Marialuisa
dc.creatorFucito, Francesco
dc.creatorLerda, Alberto
dc.creatorMorales, Jose F.
dc.date2008-07-10
dc.date2008-09-29
dc.date.accessioned2026-07-07T12:14:58Z
dc.date.available2026-07-07T12:14:58Z
dc.descriptionWe provide a direct world-sheet derivation of the couplings of NS-NS and R-R fluxes to various types of D-branes (including instantonic ones) by evaluating disk amplitudes among two open string vertex operators at a generic brane intersection and one closed string vertex representing the background fluxes. This world-sheet approach is in full agreement with the derivation of the flux couplings in the brane effective actions based on supergravity methods, but it is applicable also to more general brane configurations involving fields with twisted boundary conditions. As an application, we consider an orbifold compactification of Type IIB string theory with fractional D-branes preserving N=1 supersymmetry and study the flux-induced fermionic mass terms both on space-filling branes and on instantonic ones. Our results show the existence of a relation between the soft supersymmetry breaking and the lifting of some instanton fermionic zero-modes, which may lead to new types of non-perturbative couplings in brane-world models.
dc.description48 pages, 2 figures. One reference and some comments added
dc.identifierhttps://arxiv.org/abs/0807.1666
dc.identifierhttp://arxiv.org/abs/0807.1666
dc.identifierJHEP0810:112,2008
dc.identifierdoi:10.1088/1126-6708/2008/10/112
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211374
dc.subjectHigh Energy Physics - Theory
dc.titleFlux interactions on D-branes and instantons
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