On the sign of the dilaton in the soft wall models
arXiv:1012.4813 · doi:10.1007/JHEP04(2011)066
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.
10 pages
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