Dirac branes for Dirichlet branes: Supergravity actions

Nontrivial Bianchi identities with local magnetic sources are solved by recognizing that gauge potentials are sections rather than globally defined functions, but properly accounting for the source degrees of freedom requires a modification of the field strength. Following work by Teitelboim and by...

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Bibliographic Details
Published in:Physical review. D 2020-08, Vol.102 (4), p.1, Article 046017
Main Author: Frey, Andrew R.
Format: Article
Language:English
Subjects:
Branes
Couplings
Degrees of freedom
Dirichlet problem
Field strength
String theory
Supergravity
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Summary:Nontrivial Bianchi identities with local magnetic sources are solved by recognizing that gauge potentials are sections rather than globally defined functions, but properly accounting for the source degrees of freedom requires a modification of the field strength. Following work by Teitelboim and by Cariglia and Lechner, we extend Dirac's string formalism for monopoles to D-branes in type IIA and IIB string theory. We give novel derivations of brane-induced Chern-Simons terms in the supergravity actions, including a prescription for integrating over potentials in the presence of magnetic sources. We give a noncovariant formulation of the IIB theory, keeping only the independent degrees of freedom of the self-dual 4-form potential. Finally, it is well known that D8-branes source the mass parameter of IIA supergravity; we show that the additional couplings of the massive IIA supergravity, including on other D-brane worldvolumes, are a consequence of the corresponding Dirac branes.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.102.046017