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Intersecting flavor branes

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Abstract

We consider an instance of the AdS/CFT duality where the bulk theory contains an open string tachyon, and study the instability from the viewpoint of the boundary field theory. We focus on the specific example of the AdS5 × S 5 background with two probe D7 branes intersecting at general angles. For generic angles supersymmetry is completely broken and there is an open string tachyon between the branes. The field theory action for this system is obtained by coupling to \( \mathcal{N}=4 \) super Yang-Mills two \( \mathcal{N}=2 \) hyper multiplets in the fundamental representation of the SU(N) gauge group, but with different choices of embedding of the two \( \mathcal{N}=2 \) subalgebras into \( \mathcal{N}=4 \). On the field theory side we find a one-loop Coleman-Weinberg instability in the effective potential for the fundamental scalars. We identify a mesonic operator as the dual of the open string tachyon. By AdS/CFT, we predict the tachyon mass for small ’t Hooft coupling (large bulk curvature) and confirm that it violates the AdS stability bound.

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Authors and Affiliations

  1. C.N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, NY, 11794-3840, USA

    Elli Pomoni & Leonardo Rastelli

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  1. Elli Pomoni
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  2. Leonardo Rastelli
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Correspondence to Elli Pomoni.

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ArXiv ePrint: 1002.0006

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Pomoni, E., Rastelli, L. Intersecting flavor branes. J. High Energ. Phys. 2012, 171 (2012). https://doi.org/10.1007/JHEP10(2012)171

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