Open strings in the system D5/D9

Abstract

We construct the six-dimensional Lagrangian for the massless twisted open strings with one end-point ending on a stack of D5 and the other on a stack of D9 branes, interacting with the gauge multiplets living respectively on the D5 and D9 branes. It is first obtained by uplifting to six dimensions the four-dimensional Lagrangian of the N=2 hypermultiplet and manifestly exhibits an SU(2) symmetry. We show by an explicit calculation that it is N=1 supersymmetric in six dimensions and then we check various terms of this Lagrangian by computing string amplitudes on the disk. Finally, starting from this Lagrangian and assuming the presence of non-zero magnetic fluxes along the extra compact dimensions, we determine the spectrum of the Kaluza-Klein states which agrees with the corresponding one obtained from string theory in the field theory limit.

54 pages, Latex

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• Three generation magnetized orbifold models
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• Kaehler Metrics and Yukawa Couplings in Magnetized Brane Models
• Higher Point Spin Field Correlators in D=4 Superstring Theory
• Non-perturbative Vacuum Destabilization and D-brane Dynamics
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• $N^3$ entropy of M5 branes from dielectric effect
• Superfield description of 10D SYM theory with magnetized extra dimensions
• Shifted orbifold models with magnetic flux
• Correlators of arbitrary untwisted operators and excited twist operators for N branes at angles
• Canonical quantization of a string describing $N$ branes at angles
• Light cone quantization and interactions of a new closed bosonic string inspired to D1 string
• Towards a fully stringy computation of Yukawa couplings on non factorized tori and non abelian twist correlators (I): the classical solution and action
• On the gauge chosen by the bosonic open string
• The Classical Solution for the Bosonic String in the Presence of Three D-branes Rotated by Arbitrary SO(4) Elements
• One-loop vacuum energy in 10D super-Yang-Mills theory on magnetized tori with/without 4D N=1 supersymmetric completion