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 [11] in this paper, and changed the dilaton background from \( {e^{ - {\kappa^2}{z^2}}} \) to \( {e^{ - {\kappa^2}{z^2} + \alpha z}} \) 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.