Spectral flow and boundary string field theory for angled D-branes

Abstract

D-branes intersecting at an arbitrary fixed angle generically constitute a configuration unstable toward recombination. The reconnection of the branes nucleates at the intersection point and involves a generalization of the process of brane decay of interest to non-perturbative string dynamics as well as cosmology. After reviewing the string spectrum of systems of angled branes, we show that worldsheet twist superfields may be used in the context of Boundary Superstring Field Theory to describe the dynamics. Changing the angle between the branes is seen from the worldsheet as spectral flow with boundary insertions flowing from bosonic to fermionic operators. We calculate the complete tachyon potential and the low energy effective action as a function of angle and find an expression that interpolates between the brane-antibrane and the Dirac-Born-Infeld actions. The potential captures the mechanism of D-brane recombination and provides for interesting new physics for tachyon decay.

32 pages, 9 figures; v2 references added; v3 discussion clarified

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• Rolling Tachyon
• Tachyon Matter
• Brane Inflation
• D-Branes And K-Theory
• Cosmic String Production Towards the End of Brane Inflation
• Branes Intersecting at Angles
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• Spacelike Branes
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• Boundary Superstring Field Theory
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Cited by in corpus (14)

• Collisions of Cosmic F- and D-strings
• Cosmological Scaling Solutions of Multiple Tachyon Fields with Inverse Square Potentials
• Strings between branes
• Induced Gravity on Intersecting Branes
• The shape of nonabelian D-branes
• Tachyon Condensation for Intersecting Branes at Small and Large Angles
• Fluxbrane Inflation
• A World-Volume Perspective on the Recombination of Intersecting Branes
• Nucleon decay in gauge unified models with intersecting D6-branes
• Finite Temperature Corrections to Tachyon Mass in Intersecting D-Branes
• BPS Limit of Multi- D- and DF-strings in Boundary String Field Theory
• Genus one super-Green function revisited and superstring amplitudes with non-maximal supersymmetry
• Intersecting D-brane Stacks and Tachyons at Finite Temperature
• Condensation de tachyon dans le système brane-antibrane