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arXiv · 1012.4813

On the sign of the dilaton in the soft wall models

Andreas Karch·Emanuel Katz·Dam T. Son·Mikhail A. Stephanov
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Abstract

We elaborate on the existence of a spurious massless scalar mode in the vector channel of soft-wall models with incorrectly chosen sign of the exponential profile defining the wall. We re-iterate the point made in our earlier paper and demonstrate that the presence of the mode is robust, depending only on the infra-red asymptotics of the wall. We also re-emphasize that desired confinement properties can be realized with the correct sign choice.

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Andreas Karch, Emanuel Katz, Dam T. Son, Mikhail A. Stephanov. 2010-12-21. On the sign of the dilaton in the soft wall models. https://doi.org/10.1007/jhep04(2011)066

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