An Improved Dilaton Background in Soft-Wall Model

Abstract: We adopted the form of v.e.v. of the bulk scalar field proposed by P.Zhang in this paper, and changed the dilaton background from $e<sup>{-\kappa<sup>2z<sup>2}$ to $$e^{{-\kappa^{2z^2+\alpha}} z}$$ accordingly. The calculation shows that, as if we choose proper parameters, we can get a better result than both the present soft-wall models and the hard-wall model while keeping Regge behavior unchanged.