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We discuss a holographic soft-wall model developed for the description ofmesons and baryons with adjustable quantum numbers n, J, L, S. This approach isbased on an action which describes hadrons with broken conformal invariance andwhich incorporates confinement through the presence of a background dilatonfield. We show that in the case of the bound-state problem (hadronic massspectrum) two versions of the model with a positive and negative dilatonprofile are equivalent to each other by a special transformation of the bulkfield. We also comment on recent works which discuss the dilaton sign in thecontext of soft-wall approaches.

Dilaton in a soft-wall holographic approach to mesons and baryons