Extended soft-wall model for the QCD phase diagram

The soft-wall model, emerging as bottom-up holographic scenario anchored in the AdS/CFT correspondence, displays the disappearance of normalisable modes referring to vector mesons at a temperature $T_{\text{dis}}$ depending on the chemical potential $\mu$, $T_{\text{dis}}(\mu )$. We explore options for making $T_{\text{dis}}(\mu )$ consistent with the freeze-out curve $T_{\mathrm{f}\mathrm{.}\mathrm{o}\mathrm{.}}(\mu )$ from relativistic heavy-ion collisions and the cross-over curve $T_{\mathrm{c}}(\mu )$ from QCD at small values of $\mu$.