Glueballs at high temperature within the Hard-Wall holographic model

Abstract

In this investigation an holographic description of the deconfined phase transition of scalar and tensor glueballs is presented within the so called hard-wall model. The spectra of these bound states of gluons have been calculated from the linearized Einstein equations for a graviton propagating from a thermal $Ad{S}_5$ space to an AdS Black-Hole. In this framework, the deconfined phase is reached via a two steps mechanism. We propose that the transition between the AdS thermal sector to the BH is described via a first order phase transition, with discontinuous masses at the critical temperature, which has been determined by Herzog's method of regulating the free energy densities. Then, the glueball masses diverge with increasing $T$ in the BH phase and thus lead to deconfined states à la Hagedorn.

arXiv comment13 pages, 10 figures. Published version on "The European Physical Journal C"

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